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Sheikh SY, Hassan F, Shukla D, Bala S, Faruqui T, Akhter Y, Khan AR, Nasibullah M. A review on potential therapeutic targets for the treatment of leishmaniasis. Parasitol Int 2024; 100:102863. [PMID: 38272301 DOI: 10.1016/j.parint.2024.102863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 12/22/2023] [Accepted: 01/21/2024] [Indexed: 01/27/2024]
Abstract
Leishmania, a protozoan parasite, is responsible for the occurrence of leishmaniasis, a disease that is prevalent in tropical regions. Visceral Leishmaniasis (VL), also known as kala-azar in Asian countries, is one of the most significant forms of VL, along with Cutaneous Leishmaniasis (CL) and Mucocutaneous Leishmaniasis (ML). Management of this condition typically entails the use of chemotherapy as the sole therapeutic option. The current treatments for leishmaniasis present several drawbacks, including a multitude of side effects, prolonged treatment duration, disparate efficacy across different regions, and the emergence of resistance. To address this urgent need, it is imperative to identify alternative treatments that are both safer and more effective. The identification of appropriate pharmacological targets in conjunction with biological pathways constitutes the initial stage of drug discovery. In this review, we have addressed the key metabolic pathways that represent potential pharmacological targets as well as prominent treatment options for leishmaniasis.
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Affiliation(s)
- Sabahat Yasmeen Sheikh
- Department of Chemistry, Integral University, Dasauli, Kursi road, Lucknow 226026, India
| | - Firoj Hassan
- Department of Chemistry, Integral University, Dasauli, Kursi road, Lucknow 226026, India
| | - Deepanjali Shukla
- Department of Chemistry, Integral University, Dasauli, Kursi road, Lucknow 226026, India
| | - Shashi Bala
- Department of Chemistry, Lucknow University, Lucknow 226026, India
| | - Tabrez Faruqui
- Department of Biosciences, Integral University, Lucknow 226026, India
| | - Yusuf Akhter
- Department of Biotechnology, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow 226025, India
| | - Abdul Rahman Khan
- Department of Chemistry, Integral University, Dasauli, Kursi road, Lucknow 226026, India
| | - Malik Nasibullah
- Department of Chemistry, Integral University, Dasauli, Kursi road, Lucknow 226026, India.
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Gomes ECDS, da Silva IEP, de Araújo HDA, Barbosa CS. Malacological, socio-environmental evaluation, and evidence of local transmission and maintenance of schistosomiasis in an urban area of Northeast Brazil. Acta Trop 2024; 252:107145. [PMID: 38336344 DOI: 10.1016/j.actatropica.2024.107145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 01/27/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
To present the current epidemiological scenario of schistosomiasis related to urban transmission through an epidemiological risk assessment in Porto de Galinhas, a coastal area of Pernambuco, Brazil. Malacological and parasitological surveys were performed between the years 2018 and 2020. Snails were identified taxonomically and examined to confirm infection by Schistosoma mansoni, and so to identify Schistosomiasis Transmission Foci (STF) by the artificial light exposure technique. Stool samples were examined using the Kato-Katz method to identify schistosomiasis cases. Socioeconomic, environmental, behavioural and health data were collected by a questionnaire applied to participates in the survey and used to predict the schistosomiasis risk occurrence by multivariate logistic regression. In all, a total of 6466 snails of Biomphalaria glabrata were collected and 36 breeding sites were identified, of which 25 % were STF. A total of 2236 individuals took part of the survey which identified 187 cases of schistosomiasis, registering a positivity percentage of 8.36 %. The surveys identified the neighbourhoods with the highest risk for transmission while the socioenvironmental analysis identifies other risk factors for disease occurrence, such as gender, age range, level of education and absence of water drainage. We found that areas with poor sanitation, flooding during winter periods and dwellings located near mangroves should be treated by health authorities as priority areas for health interventions to minimize disease transmission. In addition, efforts to improve the population's educational level could certainly contribute to the adoption of measures to prevent and control this neglected tropical disease.
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Affiliation(s)
- Elainne Christine de Souza Gomes
- Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Cidade Universitária, Av. Professor Moraes Rego, 1235, CEP: 50.740-465, Recife, PE, Brazil.
| | - Iris Edna Pereira da Silva
- Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Cidade Universitária, Av. Professor Moraes Rego, 1235, CEP: 50.740-465, Recife, PE, Brazil
| | - Hallysson Douglas Andrade de Araújo
- Health Department of Ipojuca County (PE) - Brazil, Rua Cel. João Souza Leão, CEP: 55.590-000, Ipojuca, PE, Brazil; Biotechnology and Drugs Laboratory and Biomaterials Technology Laboratory - Academic Center of Vitória de Santo Antão, Federal University of Pernambuco, Rua Alto do Reservatório, s/n - Bela Vista, CEP: 55.608-680, Vitória de Santo Antão, PE, Brazil; Keizo Asami Institute (iLIKA), Federal University of Pernambuco, Cidade Universitária, Av. Prof. Moraes Rego, 1235 CEP: 50670-901, Recife, PE, Brazil
| | - Constança Simões Barbosa
- Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Cidade Universitária, Av. Professor Moraes Rego, 1235, CEP: 50.740-465, Recife, PE, Brazil
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Chanda MM, Purse BV, Hemadri D, Patil SS, Yogisharadhya R, Prajapati A, Shivachandra SB. Spatial and temporal analysis of haemorrhagic septicaemia outbreaks in India over three decades (1987-2016). Sci Rep 2024; 14:6773. [PMID: 38514747 PMCID: PMC10957987 DOI: 10.1038/s41598-024-56213-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 03/04/2024] [Indexed: 03/23/2024] Open
Abstract
Haemorrhagic septicaemia (HS) is an economically important disease affecting cattle and buffaloes and the livelihoods of small-holder farmers that depend upon them. The disease is caused by Gram-negative bacterium, Pasteurella multocida, and is considered to be endemic in many states of India with more than 25,000 outbreaks in the past three decades. Currently, there is no national policy for control of HS in India. In this study, we analysed thirty year (1987-2016) monthly data on HS outbreaks using different statistical and mathematical methods to identify spatial variability and temporal patterns (seasonality, periodicity). There was zonal variation in the trend and seasonality of HS outbreaks. Overall, South zone reported maximum proportion of the outbreaks (70.2%), followed by East zone (7.2%), Central zone (6.4%), North zone (5.6%), West zone (5.5%) and North-East zone (4.9%). Annual state level analysis indicated that the reporting of HS outbreaks started at different years independently and there was no apparent transmission between the states. The results of the current study are useful for the policy makers to design national control programme on HS in India and implement state specific strategies. Further, our study and strategies could aid in implementation of similar approaches in HS endemic tropical countries around the world.
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Affiliation(s)
- Mohammed Mudassar Chanda
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India.
| | - Bethan V Purse
- UK Centre for Ecology and Hydrology, Benson Lane, Crowmarsh Gifford, Oxfordshire, OX10 8BB, UK
| | - Divakar Hemadri
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Sharanagouda S Patil
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Revanaiah Yogisharadhya
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Awadhesh Prajapati
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Sathish Bhadravati Shivachandra
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
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Correia C, Leite AC, Fraga AG, Proença MF, Pedrosa J, Carvalho MA. Discovery of 2,9-diaryl-6-carbamoylpurines as a novel class of antitubercular agents. Eur J Med Chem 2024; 268:116297. [PMID: 38458108 DOI: 10.1016/j.ejmech.2024.116297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/01/2024] [Accepted: 03/01/2024] [Indexed: 03/10/2024]
Abstract
A series of novel 9-alkyl/aryl-2-aryl-6-carbamoylpurines were synthesized, and their activity against Mycobacterium tuberculosis strain H37Rv was assessed. The SAR analysis on the first set of derivatives, with an alkyl or aryl unit at N-9 and a phenolic unit at C-2, showed that the activity depends on the purine ring substituents at N-9 and C-2. A phenyl group at N-9 combined with a 3-hydroxyphenyl or 4-hydroxyphenyl at C-2 improve the activity. The most active compound of this set has a phenyl group at N-9 and a 4-hydroxyphenyl group at C-2, displaying an IC90 = 1.2 μg/mL and a selectivity index higher than 25.5. This compound served as a Hit to design the second set of derivatives. A phenyl group at N-9 was maintained, and the group at C-2 was diversified. The SAR analysis showed that the aryl unit at C-2 must have an oxygen or nitrogen atom bonded in the para position. A proton, a small alkyl or a substituted aryl group may also be bonded to the oxygen. The compound with the 4-methoxyphenyl group at C-2, 1Bd, exhibits the highest activity with an IC90 < 0.19 μg/mL. This compound is highly potent against M. tuberculosis strain H37Rv and non-toxic for VERO mammalian cells with an SI > 153.8. Compound 1Bd was also non-cytotoxic against primary macrophage cultures at IC90, 2xIC90, and 10xIC90 and significantly reduced the bacterial load in M. tuberculosis-infected macrophages at the same concentrations. Compound 1Bd showed a favorable pharmacokinetic profile when administered orally, with major lung and liver accumulation. In vivo antimycobacterial efficacy of 1Bd was tested at 25 mg/kg. At the tested regimen, a decrease in bacterial burden was observed in the liver. Optimization of the treatment regimen should be performed to fully potentiate the in vivo efficacy of our lead molecule, particularly in the lung, the main target organ of M. tuberculosis.
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Affiliation(s)
- Carla Correia
- CQUM - Centre of Chemistry, Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Ana Claúdia Leite
- CQUM - Centre of Chemistry, Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; PT Government Associate Laboratory ICVS/3B's, Portugal
| | - Alexandra G Fraga
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; PT Government Associate Laboratory ICVS/3B's, Portugal
| | - M Fernanda Proença
- CQUM - Centre of Chemistry, Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Jorge Pedrosa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; PT Government Associate Laboratory ICVS/3B's, Portugal
| | - M Alice Carvalho
- CQUM - Centre of Chemistry, Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
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Recopuerto-Medina LM, Gutierrez FCU, San Diego JAS, Alviar NAE, Santos JRM, Dagamac NHA. MaxEnt modeling of the potential risk of schistosomiasis in the Philippines using bioclimatic factors. Parasitol Int 2024; 98:102827. [PMID: 38030120 DOI: 10.1016/j.parint.2023.102827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 12/01/2023]
Abstract
Schistosomiasis is a parasitic infection caused by Schistosoma japonicum. It remains a principal local health issue in the Philippines, demonstrating endemicity in 28 provinces and afflicting thousands of Filipino individuals annually. Despite this, no clear distribution maps for the disease have been comprehensively reported. Therefore, species distribution modeling (SDM) employing the MaxEnt algorithm and GIS application techniques was utilized to denote the potential risk of schistosomiasis in the country. With a high AUC score of 0.846, the SDM yielded a favorable and reliable correlative map illustrating a predicted schistosomal temporal distribution concentrated primarily on the country's eastern portion with a more pronounced wet than dry season. The precipitation of the driest quarter was determined to be the most significant contributing factor among the bioclimatic variables evaluated. This suggests a possible increase in adaptations concerning the rainfall and thermal tolerances of the parasites' vectors. Moreover, socioeconomic status between Philippine regions revealed an inverse proportion with the number of schistosomiasis cases. This study also discussed the potential role of climate change on the range shifts and the potential risk of parasite infection in the Philippines.
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Affiliation(s)
- Loida M Recopuerto-Medina
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines
| | - Franchesca Chiny U Gutierrez
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines
| | - Jose Antonio S San Diego
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines
| | - Nickhole Andrei E Alviar
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines
| | - Joseff Rayven M Santos
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines
| | - Nikki Heherson A Dagamac
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila 1008, Philippines; Research Center for the Natural and Applied Sciences, University of Santo Tomas, España, Manila 1008, Philippines; The Graduate School, University of Santo Tomas, España, Manila 1008, Philippines.
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Recopuerto-Medina LM, Aguado ABM, Baldonado BMM, Bilasano RNB, Dullano SML, Molo JMR, Dagamac NHA. Predicting the potential nationwide distribution of the snail vector, Oncomelania hupensis quadrasi, in the Philippines using the MaxEnt algorithm. Parasitol Res 2023; 123:41. [PMID: 38095735 DOI: 10.1007/s00436-023-08032-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 11/09/2023] [Indexed: 12/18/2023]
Abstract
Schistosomiasis remains a major public health concern affecting approximately 12 million people in the Philippines due to inadequate information about the disease and limited prevention and control efforts. Schistosoma japonicum, one of the causative agents of the disease, requires an amphibious snail Oncomelania hupensis quadrasi (O. h. quadrasi) to complete its life cycle. Using the geographical information system (GIS) and maximum entropy (MaxEnt) algorithm, this study aims to predict the potential high-risk habitats of O. h. quadrasi driven by environmental factors in the Philippines. Based on the bioclimatic determinants, a very high-performance model was generated (AUC = 0.907), with the mean temperature of the driest quarter (25.3%) contributing significantly to the prevalence of O. h. quadrasi. Also, the snail vector has a high focal distribution, preferring areas with a pronounced wet season and high precipitation throughout the year. However, the findings provided evidence for snail adaptation to different environmental conditions. High suitability of snail habitats was found in Quezon, Camarines Norte, Camarines Sur, Albay, Sorsogon, Northern Samar, Eastern Samar, Leyte, Bohol, Surigao del Norte, Surigao del Sur, Agusan del Norte, Davao del Norte, North Cotabato, Lanao del Norte, Misamis Occidental, and Zamboanga del Sur. Furthermore, snail habitat establishment includes natural and man-made waterlogged areas, with the progression of global warming and climate change predicted to be drivers of increasing schistosomiasis transmission zones in the country.
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Affiliation(s)
- Loida M Recopuerto-Medina
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Andrea Bernice M Aguado
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Bianca Manuela M Baldonado
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Rica Nikki B Bilasano
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Sophia Miel L Dullano
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Justine Marie R Molo
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines
| | - Nikki Heherson A Dagamac
- Department of Biological Sciences, College of Science, University of Santo Tomas, España, 1008, Manila, Philippines.
- Research Center for the Natural and Applied Sciences, University of Santo Tomas, España, 1008, Manila, Philippines.
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Boonroumkaew P, Sadaow L, Janwan P, Rodpai R, Sanpool O, Buadee P, Suprom C, Thanchomnang T, Intapan PM, Maleewong W. Improved diagnostic sensitivity of human strongyloidiasis using point-of-care mixed recombinant antigen-based immunochromatography. Parasite 2023; 30:60. [PMID: 38099622 PMCID: PMC10723528 DOI: 10.1051/parasite/2023063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 11/25/2023] [Indexed: 12/17/2023] Open
Abstract
Strongyloidiasis is a neglected tropical disease that can cause fatal complications due to hyperinfection and disseminated strongyloidiasis in immunocompromised patients. We used two Strongyloides stercoralis recombinant antigenic proteins, L3NieAg.01 (NIE) and IgG-immunoreactive antigen (SsIR), to develop the recombinant antigen-based immunochromatography test (ICT) kit. We constructed and compared kits using either the NIE (NIE ICT kit) or the SsIR (SsIR ICT kit) antigens and a kit using a mixture of both (NIE-SsIR ICT kit) for detection of anti-Strongyloides IgG antibody in human serum samples. Serum samples from normal healthy individuals (Group I, n = 40), proven strongyloidiasis patients (Group II, n = 100), and those with other parasitic infections (Group III, n = 154) were evaluated. Sensitivity and specificity were 81.0% and 84.0% for the NIE ICT kit, 89.0% and 83.5% for the SsIR ICT kit, and 95.0% and 90.2% for the NIE-SsIR ICT kit, respectively. The NIE-SsIR ICT kit provided the best diagnostic results; it can supplement stool examination for clinical diagnosis and can be used to screen for asymptomatic S. stercoralis infection in people at risk in endemic areas. The NIE-SsIR ICT kit can also be used in large-scale sero-epidemiological investigations in endemic areas without the need for additional facilities or ancillary supplies.
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Affiliation(s)
- Patcharaporn Boonroumkaew
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Lakkhana Sadaow
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Penchom Janwan
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
- Department of Medical Technology, School of Allied Health Sciences, Walailak University 80161 Nakhon Si Thammarat Thailand
- Hematology and Transfusion Science Research Center, Walailak University 80161 Nakhon Si Thammarat Thailand
| | - Rutchanee Rodpai
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Oranuch Sanpool
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Punyisa Buadee
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Chanida Suprom
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Tongjit Thanchomnang
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
- Faculty of Medicine, Mahasarakham University 44000 Maha Sarakham Thailand
| | - Pewpan M. Intapan
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
| | - Wanchai Maleewong
- Department of Parasitology, Faculty of Medicine, Khon Kaen University 40002 Khon Kaen Thailand
- Mekong Health Science Research Institute, Khon Kaen University 40002 Khon Kaen Thailand
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Otieno B, Elson L, Matharu AK, Riithi N, Chongwo E, Katana K, Nasambu C, Mutebi F, Feldmeier H, Krücken J, Fillinger U, Abubakar A. Neurocognitive and mental health outcomes in children with tungiasis: a cross-sectional study in rural Kenya and Uganda. Infect Dis Poverty 2023; 12:100. [PMID: 37964353 PMCID: PMC10644620 DOI: 10.1186/s40249-023-01154-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 11/06/2023] [Indexed: 11/16/2023] Open
Abstract
BACKGROUND Tungiasis, a neglected tropical parasitosis, disproportionately affects children. Few empirical studies have reported neurocognitive and mental health outcomes of children with ectoparasitic skin diseases like tungiasis. Pathophysiology of tungiasis suggests it could detrimentally affect cognition and behaviour. This study pioneered the investigation of neurocognitive and mental health outcomes in children with tungiasis. METHODS This was a multi-site cross-sectional study including 454 quasi-randomly sampled school-children aged 8-14 from 48 randomly selected schools in two counties in Kenya and a district in Uganda. The participants were stratified into infected and uninfected based on the presence of tungiasis. The infected were further classified into mild and severe infection groups based on the intensity of the infection. Adapted, validated, and standardized measures of cognition and mental health such as Raven Matrices and Child Behaviour Checklist were used to collect data. Statistical tests including a multilevel, generalized mixed-effects linear models with family link set to identity were used to compare the scores of uninfected and infected children and to identify other potential risk factors for neurocognitive and behavioural outcomes. RESULTS When adjusted for covariates, mild infection was associated with lower scores in literacy [adjusted β(aβ) = - 8.9; 95% confidence interval (CI) - 17.2, - 0.6], language (aβ = - 1.7; 95% CI - 3.2, - 0.3), cognitive flexibility (aβ = - 6.1; 95% CI - 10.4, - 1.7) and working memory (aβ = - 0.3; 95% CI - 0.6, - 0.1). Severe infection was associated with lower scores in literacy (aβ = - 11.0; 95% CI - 19.3, - 2.8), response inhibition, (aβ = - 2.2; 95% CI - 4.2, - 0.2), fine motor control (aβ = - 0.7; 95% CI - 1.1, - 0.4) and numeracy (aβ = - 3; 95% CI - 5.5, - 0.4). CONCLUSIONS This study provides first evidence that tungiasis is associated with poor neurocognitive functioning in children. Since tungiasis is a chronic disease with frequent reinfections, such negative effects may potentially impair their development and life achievements.
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Affiliation(s)
- Berrick Otieno
- Kenya Medical Research Institute (KEMRI)-Wellcome Trust Programme, Hospital Road, Kilifi, Kenya.
| | - Lynne Elson
- Kenya Medical Research Institute (KEMRI)-Wellcome Trust Programme, Hospital Road, Kilifi, Kenya
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Abneel K Matharu
- International Centre of Insect Physiology and Ecology (ICIE), Human Health Theme, Nairobi, Kenya
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Naomi Riithi
- International Centre of Insect Physiology and Ecology (ICIE), Human Health Theme, Nairobi, Kenya
| | - Esther Chongwo
- Institute for Human Development, Aga Khan University, Nairobi, Kenya
| | - Khamis Katana
- Kenya Medical Research Institute (KEMRI)-Wellcome Trust Programme, Hospital Road, Kilifi, Kenya
| | - Carophine Nasambu
- Kenya Medical Research Institute (KEMRI)-Wellcome Trust Programme, Hospital Road, Kilifi, Kenya
| | - Francis Mutebi
- School of Veterinary Medicine and Animal Resources, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala , Uganda
| | | | - Jürgen Krücken
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Ulrike Fillinger
- International Centre of Insect Physiology and Ecology (ICIE), Human Health Theme, Nairobi, Kenya
| | - Amina Abubakar
- Kenya Medical Research Institute (KEMRI)-Wellcome Trust Programme, Hospital Road, Kilifi, Kenya
- Institute for Human Development, Aga Khan University, Nairobi, Kenya
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Ibarra Bouzada LME, Martinez Beningaza A, Cecere MC, Babino L, Guerenstein PG. Two sticky traps baited with synthetic host odors to capture Triatoma infestans, an important vector of Chagas disease. Acta Trop 2023; 246:106993. [PMID: 37516421 DOI: 10.1016/j.actatropica.2023.106993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/31/2023]
Abstract
Chagas disease is a vector-borne disease caused by Trypanosoma cruzi, which is transmitted by triatomine insects. Triatoma infestans is one of the main vectors. Efforts to eliminate T. infestans have often failed in the Gran Chaco, the largest endemic area of this species. Known methods for assessing triatomine house infestation include timed-manual collections by skilled personnel, bug notifications by householders' and/or non-baited detection devices. However, the detection sensitivity of those methods needs to be improved, especially when the bugs are present at low densities. In this work we design and evaluate the performance of two types of sticky traps (pitfall and climbing traps), when baited with a synthetic host odor lure, to capture T. infestans nymphs within an experimental box under semi-controlled laboratory conditions. Nine assays were conducted for each type of trap using a different experimental box per type of trap design and per treatment. These treatments were: test (T, trap baited with the synthetic lure), positive control (C+, trap baited with a mouse) and negative control (C-, empty trap). One hundred percent of the sticky pitfall and 89% of the climbing traps baited with the synthetic lure captured at least one insect. Moreover, the sticky pitfall trap and the sticky climbing trap, both baited with the synthetic lure, captured 30% and 40% of the insects in a single night, respectively. In both cases, the trap with the synthetic lure captured significantly more insects than the non-baited trap. However, the synthetic lure could be improved, as the traps with this lure captured significantly less insects than the traps with a live host. In summary, the two types of synthetically-baited traps tested were able to capture T. infestans nymphs, indicating that both designs are effective under the laboratory experimental conditions and insect abundance used in this work. These traps deserve to be tested in a field setting.
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Affiliation(s)
- Lucía M E Ibarra Bouzada
- Laboratorio de Estudio de la Biología de Insectos, Centro de Investigaciones Científicas y de Transferencia Tecnológica a la Producción (CONICET - Prov. Entre Ríos - UADER), Diamante, Entre Ríos E3105, Argentina; Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral, Santa Fe S3000, Argentina.
| | - Andrea Martinez Beningaza
- Laboratorio de Estudio de la Biología de Insectos, Centro de Investigaciones Científicas y de Transferencia Tecnológica a la Producción (CONICET - Prov. Entre Ríos - UADER), Diamante, Entre Ríos E3105, Argentina
| | - M Carla Cecere
- Laboratorio de Eco-Epidemiología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina; Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Lucía Babino
- Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
| | - Pablo G Guerenstein
- Laboratorio de Estudio de la Biología de Insectos, Centro de Investigaciones Científicas y de Transferencia Tecnológica a la Producción (CONICET - Prov. Entre Ríos - UADER), Diamante, Entre Ríos E3105, Argentina; Facultad de Ingeniería, Universidad Nacional de Entre Ríos, Oro Verde, Entre Ríos E3100, Argentina
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10
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Schurer JM, Murara E, van Oirschot J, Ooms G. Antivenom for sale? Availability and affordability of snakebite medicines across public and private health facilities in Rwanda. Toxicon 2023; 234:107292. [PMID: 37734455 DOI: 10.1016/j.toxicon.2023.107292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/05/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023]
Abstract
Antivenom is considered the safest and most effective treatment against snake envenomation (SBE); however, global shortages mean that many low-income countries struggle to meet demand. In Rwanda, chronic shortages of essential medicines are an important barrier to robust healthcare delivery and discourage snakebite victims from seeking hospital care. The aim of this retrospective, cross-sectional study was to evaluate the availability and affordability of commodities to treat SBE at hospitals and health centers. In total, our team interviewed pharmacy managers at 111 public and 31 private health facilities (N = 142) to complete a validated quantitative questionnaire, entering data electronically through KoBoCollect. Commodity prices were collected in 2023RWF and for the lowest cost item across any category. A commodity was considered affordable if a treatment regimen cost less than one day's wages, using the international poverty line to approximate a low-income worker's wages. Across all health facilities, mean availability of SBE commodities was relatively good (77.1%). Snake antivenom was only available at public hospitals and was concentrated in urban rather than rural areas. Two snake antivenom types were observed, one of which was not appropriate for treating envenomation by East African snakes. Overall, this meant that only 4.2% of facilities stocked safe and effective antivenom. Black stones, an ineffective traditional treatment, were sold by 5.6% of health providers. Moreover, antivenom did not meet the minimum threshold for affordability, costing on average 10 days of work for a single dose among uninsured individuals. Altogether, this study highlights serious performance gaps among pharmacies responsible for procuring and supplying SBE commodities and helps to explain the widespread belief that SBE treatment is unaffordable at hospitals and health centers. Urgent action is needed to ensure that all hospital and health center pharmacies located in high-risk areas stock appropriate antivenom and that re-stocking time for essential medicines is reduced.
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Affiliation(s)
- Janna M Schurer
- Center for One Health, University of Global Health Equity, Butaro, Rwanda; Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine at Tufts University, North Grafton, USA.
| | - Elijah Murara
- Center for One Health, University of Global Health Equity, Butaro, Rwanda
| | | | - Gaby Ooms
- Health Action International, Amsterdam, the Netherlands; Utrecht WHO Collaborating Centre for Pharmaceutical Policy and Regulation, Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, the Netherlands.
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11
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Rivera EP, Arrivillaga MR, Juárez JG, De Urioste-Stone SM, Berganza E, Pennington PM. Adoption of community-based strategies for sustainable vector control and prevention. BMC Public Health 2023; 23:1834. [PMID: 37730592 PMCID: PMC10512496 DOI: 10.1186/s12889-023-16516-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 08/11/2023] [Indexed: 09/22/2023] Open
Abstract
Community engagement strategies provide tools for sustainable vector-borne disease control. A previous cluster randomized control trial engaged nine intervention communities in seven participatory activities to promote management of the domestic and peri-domestic environment to reduce risk factors for vector-borne Chagas disease. This study aims to assess the adoption of this innovative community-based strategy, which included chickens' management, indoor cleaning practices, and domestic rodent infestation control, using concepts from the Diffusion of Innovations Theory. We used questionnaires and semi-structured interviews to understand perceptions of knowledge gained, intervention adoption level, innovation attributes, and limiting or facilitating factors for adoption. The analysis process focused on five innovation attributes proposed by the Diffusion of Innovations Theory: relative advantage, compatibility, complexity, trialability, and observability. Rodent management was highly adopted by participants, as it had a relative advantage regarding the use of poison and was compatible with local practices. The higher complexity was reduced by offering several types of trapping systems and having practical workshops allowed trialability. Observability was limited because the traps were indoors, but information and traps were shared with neighbors. Chicken management was not as widely adopted due to the higher complexity of the method, and lower compatibility with local practices. Using the concepts proposed by the Diffusion of Innovations Theory helped us to identify the enablers and constraints in the implementation of the Chagas vector control strategy. Based on this experience, community engagement and intersectoral collaboration improve the acceptance and adoption of novel and integrated strategies to improve the prevention and control of neglected diseases.
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Affiliation(s)
- Elizabeth Pellecer Rivera
- Centro de Estudios en Salud, Universidad del Valle de Guatemala, 18 Av. 11-95 Zona 15 VH III, Guatemala City, Guatemala.
- Ecology and Environmental Sciences, University of Maine, Orono, ME, USA.
| | - Margarita Rivera Arrivillaga
- Centro de Estudios en Salud, Universidad del Valle de Guatemala, 18 Av. 11-95 Zona 15 VH III, Guatemala City, Guatemala.
| | - José G Juárez
- Centro de Estudios en Salud, Universidad del Valle de Guatemala, 18 Av. 11-95 Zona 15 VH III, Guatemala City, Guatemala
| | - Sandra M De Urioste-Stone
- Centro de Estudios en Salud, Universidad del Valle de Guatemala, 18 Av. 11-95 Zona 15 VH III, Guatemala City, Guatemala
- Present Address: School of Forest Resources, University of Maine, Orono, ME, USA
| | - Elsa Berganza
- Área de Salud de Jutiapa, Ministerio de Salud Pública y Asistencia Social, Jutiapa, Guatemala
| | - Pamela Marie Pennington
- Centro de Estudios en Salud, Universidad del Valle de Guatemala, 18 Av. 11-95 Zona 15 VH III, Guatemala City, Guatemala
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Lamolle G, Iriarte A, Simón D, Musto H. Amino acid usage and protein expression levels in the flatworm Schistosoma mansoni. Mol Biochem Parasitol 2023; 255:111581. [PMID: 37478919 DOI: 10.1016/j.molbiopara.2023.111581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 07/23/2023]
Abstract
Schistosoma mansoni is a parasitic flatworm that causes a human disease called schistosomiasis, or bilharzia. At the genomic level, S. mansoni is AT-rich, but has some compositional heterogeneity. Indeed, some regions of its genome are GC-rich, mainly in the regions located near the extreme ends of the chromosomes. Recently, we showed that, despite the strong bias towards A/T ending codons, highly expressed genes tend to use GC-rich codons. Here, we address the following question: are highly expressed sequences biased in their amino acid frequencies? Our analyses show that these sequences in S. mansoni, as in species ranging from bacteria to human, are strongly biased in nucleotide composition. Highly expressed genes tend to use GC-rich codons (in the first and second codon positions), which code the energetically cheapest amino acids. Therefore, we conclude that amino acid usage, at least in highly expressed genes, is strongly shaped by natural selection to avoid energetically expensive residues. Whether this is an adaptation to the parasitic way of life of S. mansoni, is unclear since the same pattern occurs in free-living species.
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Affiliation(s)
- Guillermo Lamolle
- Unidad de Genómica Evolutiva, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Andrés Iriarte
- Unidad de Genómica Evolutiva, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay; Laboratorio de Biología Computacional, Departamento de Desarrollo Biotecnológico, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Avenida A. Navarro 3051, 11600 Montevideo, Uruguay
| | - Diego Simón
- Unidad de Genómica Evolutiva, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay; Laboratorio de Virología Molecular, Centro de Investigaciones Nucleares, Universidad de la República, Mataojo 2055, 11400 Montevideo, Uruguay; Laboratorio de Evolución Experimental de Virus, Institut Pasteur de Montevideo, Mataojo 2020, 11400 Montevideo, Uruguay
| | - Héctor Musto
- Unidad de Genómica Evolutiva, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay.
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13
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Kyejo W, Panjwani S, Ismail A, Mathew B, Ngimba C, Mwanga A. Gall bladder schistosomiasis diagnosed incidentally post laparoscopic cholecystectomy: A case report. Int J Surg Case Rep 2023; 110:108787. [PMID: 37669608 PMCID: PMC10510073 DOI: 10.1016/j.ijscr.2023.108787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/07/2023] Open
Abstract
INTRODUCTION AND IMPORTANCE Schistosomiasis is a neglected tropical disease caused by parasitic worms of the genus Schistosoma. It primarily affects the intestines, liver, and urinary tract however, rare cases have been reported where the parasite invades other organs. This case report presents an incidental finding of schistosomiasis, upon histopathology evaluation, in a patient who underwent laparoscopic cholecystectomy for symptomatic gallstone disease with recurrent attacks of cholecystitis. CASE PRESENTATION We present the case of a 42-year-old female patient who presented to the emergency department with symptoms and signs suggestive of acute cholecystitis. She underwent conservative management with interval laparoscopic cholecystectomy with histopathology findings of Schistosoma eggs within the walls of the gallbladder. Underwent eradication therapy with praziquantel. CLINICAL DISCUSSION The finding of Schistosoma eggs in the gallbladder wall during routine histopathological examination highlights the importance of considering schistosomiasis, and other parasites, in cases of recurrent bouts of cholecystitis. The case challenges the conventional understanding of the transmission patterns of this parasitic infection and raises questions about potential atypical life cycle routes within the human body. It also emphasizes the importance of routine histopathology analysis of specimen removed from the body. CONCLUSION This case report presents a rare occurrence of schistosomiasis cholecystitis in a 42-year-old female patient underscoring the importance of considering parasitic infections. Thorough histopathological examination in routine surgeries is crucial for early detection and targeted treatment. The patient's positive response to praziquantel therapy highlights its effectiveness in managing schistosomiasis, which is a neglected tropical disease.
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Affiliation(s)
- Willbroad Kyejo
- The Aga Khan University, East Africa Medical college, Tanzania.
| | - Sajida Panjwani
- The Aga Khan University, East Africa Medical college, Tanzania.
| | - Allyzain Ismail
- The Aga Khan University, East Africa Medical college, Tanzania.
| | - Blessing Mathew
- Department of General Surgery, The Aga Khan Hospital, Dar-es-Salaam, Tanzania.
| | - Caroline Ngimba
- Department of Pathology, The Aga Khan Hospital, Dar-es-Salaam, Tanzania.
| | - Ally Mwanga
- Department of Surgical Gastroenterology, Muhimbili University of Health and Allied Sciences, Dar-Es-Salaam, Tanzania
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Stelzle D, Makasi C, Welte TM, Ruether C, Schmidt V, Gabriel S, Bottieau E, Fleury A, Ngowi BJ, Winkler AS. Report of three patients with extensive neurocysticercosis in rural southern Tanzania: neurological, serological and neuroradiological findings. J Med Case Rep 2023; 17:311. [PMID: 37408061 DOI: 10.1186/s13256-023-03974-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 05/05/2023] [Indexed: 07/07/2023] Open
Abstract
BACKGROUND Neurocysticercosis (NCC) is common in eastern Africa, but disease presentation varies considerably. Most patients have single or few NCC-typical lesions in their brain but some present with a large number of lesions. We present three patients with positive antibody-based serology for Taenia solium cysticercosis screened at the Vwawa district hospital, Mbozi district, southern Tanzania, in whom extensive NCC was confirmed by neuroimaging. CASE PRESENTATIONS Patient 1 was a 55-year-old female from the tribe Malila smallholder farmer who has had four generalized tonic-clonic epileptic seizures over a period of 11 years and one episode of transient left hemiparesis one year before seizure onset. The patient also reported monthly to weekly episodes of severe, progressive, unilateral headache. The computed tomography (CT) scan of the brain showed 25 NCC lesions of which 15 were in the vesicular stage. Patient 2 was a 30-year-old male from tribe Nyha mechanic who reported monthly episodes of moderate to severe, progressive, bilateral headache, but no epileptic seizures. The CT scan showed 63 NCC lesions of which 50 were in the vesicular stage. Patient 3 was a 54-year-old female from the tribe Malila smallholder farmer who suffered from frequent generalized tonic-clonic epileptic seizures with potential signs of focal seizure onset. She also reported weekly to daily episodes of severe, progressive, unilateral headache. The CT scan showed 29 NCC lesions of which 28 were in the vesicular stage. CONCLUSIONS Clinical presentation of NCC with multiple brain lesions varies considerably ranging from few epileptic seizures and severe headache to severe epilepsy with frequent epileptic seizures. Individuals with neurological signs/symptoms that may be due to NCC, based for example on epidemiological criteria or serological evidence of cysticercosis, are recommended to undergo neuroimaging before anthelminthic treatment is considered.
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Affiliation(s)
- D Stelzle
- Center for Global Health, Department of Neurology, School of Medicine, Technical University of Munich, Munich, Germany.
| | - C Makasi
- Muhimbili Medical Research Centre, National Institute for Medical Research, Dar es Salaam, Tanzania
- Faculty of Medicine, Kilimanjaro Christian Medical University College, Moshi, Tanzania
| | - T M Welte
- Center for Global Health, Department of Neurology, School of Medicine, Technical University of Munich, Munich, Germany
- Epilepsy Center, Department of Neurology, University Hospital Erlangen, Erlangen, Germany
| | - C Ruether
- Department of Neuroradiology, RoMed Clinic Rosenheim, Rosenheim, Germany
| | - V Schmidt
- Center for Global Health, Department of Neurology, School of Medicine, Technical University of Munich, Munich, Germany
| | - S Gabriel
- Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - E Bottieau
- Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - A Fleury
- Departamento de Medicina Genómica y Toxicología ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México/Instituto Nacional de Neurología y Neurocirugía, Ciudad de Mexico, Mexico
| | - B J Ngowi
- Muhimbili Medical Research Centre, National Institute for Medical Research, Dar es Salaam, Tanzania
- University of Dar Es Salaam, Mbeya College of Health and Allies Sciences, Mbeya, Tanzania
| | - A S Winkler
- Center for Global Health, Department of Neurology, School of Medicine, Technical University of Munich, Munich, Germany
- Department of Community Medicine and Global Health, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
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Jacques Dit Lapierre TJW, Cruz MGFDML, Brito NPF, Resende DDM, Souza FDO, Pilau EJ, da Silva MFB, Neves BJ, Murta SMF, Rezende Júnior CDO. Hit-to-lead optimization of a pyrazinylpiperazine series against Leishmania infantum and Leishmania braziliensis. Eur J Med Chem 2023; 256:115445. [PMID: 37156183 DOI: 10.1016/j.ejmech.2023.115445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 04/17/2023] [Accepted: 05/01/2023] [Indexed: 05/10/2023]
Abstract
An early hit-to-lead optimization of a novel pyrazinylpiperazine series against L. infantum and L. braziliensis has been performed after an extensive SAR focusing on the benzoyl fragment of hit (4). Deletion of the meta-Cl of (4) led to the obtention of the para-hydroxyl derivative (12), on which the design of most monosubstituted derivatives of the SAR was based. Further optimization of the series, involving disubstituted benzoyl fragments and the hydroxyl substituent of (12), allowed the obtention of a total of 15 compounds with increased antileishmanial potency (IC50 < 10 μM), nine of which displayed activity in the low micromolar range (IC50 < 5 μM). This optimization ultimately identified the ortho, meta-dihydroxyl derivative (46) as an early lead for this series (IC50 (L. infantum) = 2.8 μM, IC50 (L. braziliensis) = 0.2 μM). Additional assessment of some selected compounds against other trypanosomatid parasites revealed that this series is selective towards Leishmania parasites, and in silico ADMET predictions revealed satisfactory profiles for these compounds, allowing further lead optimization of the pyrazinylpiperazine class against Leishmania.
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Affiliation(s)
| | | | - Nícolas Peterson Ferreira Brito
- Laboratório de Síntese de Candidatos a Fármacos, Instituto de Química, Universidade Federal de Uberlândia (UFU), Uberlândia, MG, 38400-902, Brazil
| | - Daniela de Melo Resende
- Grupo de Genômica Funcional de Parasitos, Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ Minas), Belo Horizonte, MG, 30190-002, Brazil
| | - Felipe de Oliveira Souza
- Laboratório de Biomoléculas e Espectrometria de Massas (LaBioMass), Universidade Estadual de Maringá (UEM), Maringá, PR, 807020-900, Brazil
| | - Eduardo Jorge Pilau
- Laboratório de Biomoléculas e Espectrometria de Massas (LaBioMass), Universidade Estadual de Maringá (UEM), Maringá, PR, 807020-900, Brazil
| | - Meryck Felipe Brito da Silva
- Laboratory of Cheminformatics (LabChem), Faculdade de Farmácia, Universidade Federal de Goiás, Goiânia, GO, 74605-170, Brazil
| | - Bruno Junior Neves
- Laboratory of Cheminformatics (LabChem), Faculdade de Farmácia, Universidade Federal de Goiás, Goiânia, GO, 74605-170, Brazil
| | - Silvane Maria Fonseca Murta
- Grupo de Genômica Funcional de Parasitos, Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ Minas), Belo Horizonte, MG, 30190-002, Brazil
| | - Celso de Oliveira Rezende Júnior
- Laboratório de Síntese de Candidatos a Fármacos, Instituto de Química, Universidade Federal de Uberlândia (UFU), Uberlândia, MG, 38400-902, Brazil.
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de Souza DK, Addo SO, Desewu K, Nzelu CO, Mosore MT, Nimo-Paintsil S, Attram N, Appawu M, Wilson MD, Boakye DA. Investigating potential sand fly vectors after the first reported outbreak of cutaneous leishmaniasis in Ghana. Parasit Vectors 2023; 16:154. [PMID: 37118766 PMCID: PMC10148561 DOI: 10.1186/s13071-023-05767-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/03/2023] [Indexed: 04/30/2023] Open
Abstract
BACKGROUND Leishmaniasis is a parasitic disease caused by species of the genus Leishmania, which are transmitted through the bite of infected female sand flies. Since the first reported outbreak of cutaneous leishmaniasis in Ghana, in 1999, there has been limited published information on its vectors and reservoir hosts there. Previous studies have shown strong dominance of the sand fly genus Sergentomyia over the genus Phlebotomus in Ghana. Thus the aim of this study was to determine the possible sand fly vector species in Ghana, as well as their human-feeding behavior, from the time of the first reported outbreak of CL in the country. METHODS Sand flies were collected from randomly selected houses in three communities. They were identified and used for blood meal source identification and the detection of Leishmania infection using molecular methods. RESULTS: A total of 1051 female sand flies were morphologically identified, of which Sergentomyia africana africana (29%) was the predominant species. Among the 275 female sand flies that had blood-fed, the identified blood meal sources included chicken (33.8%) and goat (12.4%); the percentage of human blood meals was 32%. Single-source and mixed-source blood meals were identified in Sergentomyia africana africana (11.6%), Sergentomyia ingrami (14.9%) and Sergentomyia simillima (20%), with S. simillima having the highest proportion of blood meals that included human blood (14.6%). Using molecular methods, unfed sand flies and identified human-feeding species were examined for the presence of Leishmania DNA. Pool screening analysis revealed three pools of S. ingrami positive for Leishmania major DNA, with an infection rate of 1.27% (95% confidence interval 2.467-3.647). CONCLUSIONS The findings suggest that some Sergentomyia species may be involved in the transmission of cutaneous leishmaniasis in Ghana. However, the role of S. ingrami as a vector of leishmaniasis in Ghana needs to be conclusively validated by isolating the parasite from this species and through experimental transmission studies.
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Affiliation(s)
- Dziedzom K de Souza
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana.
| | - Seth Offei Addo
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Kwame Desewu
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
- Ghana Health Service, Accra, Ghana
| | - Chukwunonso O Nzelu
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
- Snyder Institute for Chronic Diseases, Departments of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine and Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Mba T Mosore
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Shirley Nimo-Paintsil
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Naiki Attram
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Maxwell Appawu
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Michael D Wilson
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
| | - Daniel A Boakye
- Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, LG 581, Legon, Accra, Ghana
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Wang YC, Law A, Namsanor J, Sithithaworn P. Examining ecosystem (dis-)services on liver fluke infection in rural Northeast Thailand. Infect Dis Poverty 2023; 12:38. [PMID: 37076937 PMCID: PMC10114451 DOI: 10.1186/s40249-023-01079-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 03/09/2023] [Indexed: 04/21/2023] Open
Abstract
BACKGROUND The direct reliance of humans on and their interactions with freshwater ecosystems in the Lower Mekong Basin have given rise to parasitic infections, which is particularly prevalent in Northeast Thailand where raw fish consumption is practiced. This study examined the interactions between environments, ecosystem (dis-)services, human raw fish consumption habits, and raw fish dish sharing on liver fluke infection risk. METHOD Water fecal contents and the first intermediate snail host were sampled between June and September of 2019. One hundred twenty questionnaires were surveyed in two villages of different environmental surroundings, one next to a river and the other located inland, in Northeast Thailand. Multivariate regression analyses using linear mixed effect models assessed the influence of social, behavioral and perceptual factors on raw fish consumption frequency, willingness to avoid consumption and liver fluke infection status. Social network analysis compared the degree of raw fish dish sharing between the villages and assessed the probable influence of connections to fish procurement locations and sharing activities on liver fluke infection risk. RESULTS High abundance of the first intermediate snail host and presence of fecal contamination in water could endanger both villages to ecosystem disservices of parasitic transmission. The river-side village relied more on provisioning ecosystem services than the inland village (29.7% vs. 16.1% of villages) to consume raw fish as their main source of protein. Males in both villages (64.5 and 40.4 days/year for the respective villages) are also likely to consume koi pla and pla som, higher risk fish dishes, more frequently than females (4.1 and 4.3 days/year for the respective villages). The consumption habits of both villages were driven mostly by deriving cultural ecosystem services. Participation in raw fish dish sharing activities significantly reduced the odds of an individual being willing to avoid the consumption (Odds ratio = 0.19). Network analysis suggested that river-side villagers had a more direct raw fish dish sharing interaction and they procured fish from multiple locations; these characteristics might potentially account for more liver fluke infected households in the village. CONCLUSION Villagers' raw fish consumption is driven by deriving cultural ecosystem services, and the geographic settings of the villages potentially affect villagers' fish procurement locations and infection risk. The findings underscore the linkages between villagers and their surrounding ecosystem environments as pertinent determinants for foodborne parasitic disease risk.
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Affiliation(s)
- Yi-Chen Wang
- Department of Geography, National University of Singapore, 1 Arts link, Block AS2, 117568, Singapore, Singapore.
| | - Andrea Law
- Department of Geography, National University of Singapore, 1 Arts link, Block AS2, 117568, Singapore, Singapore
| | - Jutamas Namsanor
- Department of Geography, National University of Singapore, 1 Arts link, Block AS2, 117568, Singapore, Singapore
| | - Paiboon Sithithaworn
- Department of Parasitology and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, 123 Mittraphap Rd, Mueang Khon Kaen District, 40002, Khon Kaen, Thailand
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Chiko Y, Shiokawa K, Namihira I, Itagaki K, Maruyama K, Tachibana Y, Ryu Y, Sakai T. Report of Weil's disease with a fatal course triggered by Jarisch-Herxheimer reaction. J Infect Chemother 2023:S1341-321X(23)00100-9. [PMID: 37075979 DOI: 10.1016/j.jiac.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/16/2023] [Accepted: 04/15/2023] [Indexed: 04/21/2023]
Abstract
Leptospirosis, a zoonotic disease characterized by a spectrum of influenza-like symptoms, can manifest as severe cases so called Weil's disease. Early diagnosis and treatment are crucial to avoid the potentially fatal course of the disease. Within 24 hours of the initial administration of antibiotics, patients may experience the Jarisch-Herxheimer reaction (JHR), characterized by chills, fever, hypotension, and impaired consciousness. The Okinawa Prefecture, where our hospital is situated, boasts the highest incidence rate of leptospirosis among all regions in Japan. This reports our encounter with the initial leptospirosis case after a period of 16 years within the Okinawa Prefecture. This case exhibited JHR and required the utilization of noradrenaline (NA). Despite evidence indicating that JHR does not correlate with mortality, we contend that diagnosis of Weil's disease necessitates admission to an intensive care unit (ICU) and vigilant monitoring for JHR, as it may result in impairment of general condition and fatal outcome, as observed in our case.
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Affiliation(s)
- Yuki Chiko
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan.
| | - Kinue Shiokawa
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Ikumi Namihira
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Kensuke Itagaki
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Kengo Maruyama
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Yuki Tachibana
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Yoshinori Ryu
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
| | - Tatsuya Sakai
- Department of General Medicine, Okinawa Prefectural Yaeyama Hospital, Ishigaki, Japan
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Dean L, Tolhurst R, Nallo G, Kollie K, Bettee A, Theobald S. A health-systems journey towards more people-centred care: lessons from neglected tropical disease programme integration in Liberia. Health Res Policy Syst 2023; 21:29. [PMID: 37055758 PMCID: PMC10103472 DOI: 10.1186/s12961-023-00975-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 02/25/2023] [Indexed: 04/15/2023] Open
Abstract
BACKGROUND Neglected tropical diseases (NTDs) are associated with high levels of morbidity and disability as a result of stigma and social exclusion. To date, the management of NTDs has been largely biomedical. Consequently, ongoing policy and programme reform within the NTD community is demanding the development of more holistic disease management, disability and inclusion (DMDI) approaches. Simultaneously, integrated, people-centred health systems are increasingly viewed as essential to ensure the efficient, effective and sustainable attainment of Universal Health Coverage. Currently, there has been minimal consideration of the extent to which the development of holistic DMDI strategies are aligned to and can support the development of people-centred health systems. The Liberian NTD programme is at the forefront of trying to establish a more integrated, person-centred approach to the management of NTDs and provides a unique learning site for health systems decision makers to consider how shifts in vertical programme delivery can support overarching systems strengthening efforts that are designed to promote the attainment of health equity. METHODS We use a qualitative case study approach to explore how policy and programme reform of the NTD programme in Liberia supports systems change to enable the development of integrated people-centred services. RESULTS A cumulation of factors, catalysed by the shock to the health system presented by the Ebola epidemic, created a window of opportunity for policy change. However, programmatic change aimed at achieving person-centred practice was more challenging. Deep reliance on donor funding for health service delivery in Liberia limits the availability of flexible funding, and the ongoing funding prioritization towards specific disease conditions limits flexibility in health systems design that can shape more person-centred care. CONCLUSION Sheikh et al.'s four key aspects of people centred health systems, that is, (1) putting peoples voices and needs first; (2) people centredness in service delivery; (3) relationships matter: health systems as social institutions; and (4) values drive people centred health systems, enable the illumination of varying push and pull factors that can facilitate or hinder the alignment of DMDI interventions with the development of people-centred health systems to support disease programme integration and the attainment of health equity.
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Affiliation(s)
- Laura Dean
- Department of International Public Health, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK.
| | - Rachel Tolhurst
- Department of International Public Health, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Gartee Nallo
- University of Liberia Pacific Institute for Research and Evaluation, Monrovia, Monsterrado, Liberia
| | - Karsor Kollie
- Neglected Tropical Disease Programme, Ministry of Health, Government of Liberia, Monrovia, Monsterrado, Liberia
| | - Anthony Bettee
- Neglected Tropical Disease Programme, Ministry of Health, Government of Liberia, Monrovia, Monsterrado, Liberia
| | - Sally Theobald
- Department of International Public Health, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
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Anisuzzaman, Hossain MS, Hatta T, Labony SS, Kwofie KD, Kawada H, Tsuji N, Alim MA. Food- and vector-borne parasitic zoonoses: Global burden and impacts. Adv Parasitol 2023; 120:87-136. [PMID: 36948728 DOI: 10.1016/bs.apar.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Around 25% of the global population suffer from one or more parasitic infections, of which food- and vector-borne parasitic zoonotic diseases are a major concern. Additionally, zoonoses and communicable diseases, common to man and animals, are drawing increased attention worldwide. Significant changes in climatic conditions, cropping pattern, demography, food habits, increasing international travel, marketing and trade, deforestation, and urbanization play vital roles in the emergence and re-emergence of parasitic zoonoses. Although it is likely to be underestimated, the collective burden of food- and vector-borne parasitic diseases accounts for ∼60 million disability-adjusted life years (DALYs). Out of 20 neglected tropical diseases (NTDs) listed by the World Health Organization (WHO) and the Centres for Disease Control and Prevention (CDC), 13 diseases are of parasitic origin. There are about 200 zoonotic diseases of which the WHO listed eight as neglected zoonotic diseases (NZDs) in the year 2013. Out of these eight NZDs, four diseases, namely cysticercosis, hydatidosis, leishmaniasis, and trypanosomiasis, are caused by parasites. In this review, we discuss the global burden and impacts of food- and vector-borne zoonotic parasitic diseases.
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Affiliation(s)
- Anisuzzaman
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.
| | - Md Shahadat Hossain
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Takeshi Hatta
- Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Minami, Sagamihara, Kanagawa, Japan
| | - Sharmin Shahid Labony
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Kofi Dadzie Kwofie
- Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Minami, Sagamihara, Kanagawa, Japan; Department of Parasitology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Hayato Kawada
- Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Minami, Sagamihara, Kanagawa, Japan
| | - Naotoshi Tsuji
- Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Minami, Sagamihara, Kanagawa, Japan.
| | - Md Abdul Alim
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
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21
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Lowe C, Ahmadabadi Z, Gray D, Kelly M, McManus DP, Williams G. Systematic review of applied mathematical models for the control of Schistosoma japonicum. Acta Trop 2023; 241:106873. [PMID: 36907291 DOI: 10.1016/j.actatropica.2023.106873] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/19/2023] [Accepted: 02/27/2023] [Indexed: 03/14/2023]
Abstract
BACKGROUND Schistosoma japonicum remains endemic in China and the Philippines. Substantial progress has been made in the control of Japonicum in both China and the Philippines. China is reaching elimination thanks to a concerted effort of control strategies. Mathematical modelling has been a key tool in the design of control strategies, in place of expensive randomised-controlled trials. We conducted a systematic review to investigate mathematical models of Japonicum control strategies in China and the Philippines. METHODS We conducted a systematic review on July 5, 2020, in four electronic bibliographic databases - PubMed, Web of Science, SCOPUS and Embase. Articles were screened for relevance and for meeting the inclusion criteria. Data extracted included authors, year of publication, year of data collection, setting and ecological context, objectives, control strategies, main findings, the form and content of the model including its background, type, representation of population dynamics, heterogeneity of hosts, simulation period, source of parameters, model validation and sensitivity analysis. Results After screening, 19 eligible papers were included in the systematic review. Seventeen considered control strategies in China and two in the Philippines. Two frameworks were identified; the mean-worm burden framework and the prevalence-based framework, the latter of which increasingly common. Most models considered human and bovine definitive hosts. There were mixed additional elements included in the models, such as alternative definitive hosts and the role of seasonality and weather. Models generally agreed upon the need for an integrated control strategy rather than reliance on mass drug administration alone to sustain reductions in prevalence. CONCLUSIONS Mathematical modelling of Japonicum has converged from multiple approaches to modelling using the prevalence-based framework with human and bovine definitive hosts and find integrated control strategies to be most effective. Further research could investigate the role of other definitive hosts and model the effect of seasonal fluctuations in transmission.
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Affiliation(s)
- Callum Lowe
- Department of Global Health, National Centre for Epidemiology and Population Health, Australian National University, Building 62a Mills Street, ACT, Acton 2601, Australia.
| | - Zohre Ahmadabadi
- School of Public Health, Discipline of Epidemiology and Biostatistics, University of Queensland, Brisbane, Australia
| | - Darren Gray
- Department of Global Health, National Centre for Epidemiology and Population Health, Australian National University, Building 62a Mills Street, ACT, Acton 2601, Australia; School of Public Health, Discipline of Epidemiology and Biostatistics, University of Queensland, Brisbane, Australia; Infection and Inflammation Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia
| | - Matthew Kelly
- Department of Global Health, National Centre for Epidemiology and Population Health, Australian National University, Building 62a Mills Street, ACT, Acton 2601, Australia
| | - Donald P McManus
- Infection and Inflammation Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia
| | - Gail Williams
- School of Public Health, Discipline of Epidemiology and Biostatistics, University of Queensland, Brisbane, Australia
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Beutler M, Harnischfeger J, Weber MHW, Hahnel SR, Quack T, Blohm A, Ueberall ME, Timm T, Lochnit G, Rennar GA, Gallinger TL, Houhou H, Rahlfs S, Falcone FH, Becker K, Schlitzer M, Haeberlein S, Czermak P, Salzig D, Grevelding CG. Identification and characterisation of the tegument-expressed aldehyde dehydrogenase SmALDH_312 of Schistosoma mansoni, a target of disulfiram. Eur J Med Chem 2023; 251:115179. [PMID: 36948075 DOI: 10.1016/j.ejmech.2023.115179] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/17/2023] [Accepted: 01/31/2023] [Indexed: 02/12/2023]
Abstract
Schistosomiasis is an infectious disease caused by blood flukes of the genus Schistosoma and affects approximately 200 million people worldwide. Since Praziquantel (PZQ) is the only drug for schistosomiasis, alternatives are needed. By a biochemical approach, we identified a tegumentally expressed aldehyde dehydrogenase (ALDH) of S. mansoni, SmALDH_312. Molecular analyses of adult parasites showed Smaldh_312 transcripts in both genders and different tissues. Physiological and cell-biological experiments exhibited detrimental effects of the drug disulfiram (DSF), a known ALDH inhibitor, on larval and adult schistosomes in vitro. DSF also reduced stem-cell proliferation and caused severe tegument damage in treated worms. In silico-modelling of SmALDH_312 and docking analyses predicted DSF binding, which we finally confirmed by enzyme assays with recombinant SmALDH_312. Furthermore, we identified compounds of the Medicine for Malaria Venture (MMV) pathogen box inhibiting SmALDH_312 activity. Our findings represent a promising starting point for further development towards new drugs for schistosomiasis.
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Affiliation(s)
- Mandy Beutler
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Julie Harnischfeger
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - Michael H W Weber
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Steffen R Hahnel
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Thomas Quack
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Ariane Blohm
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Monique E Ueberall
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany; Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - Thomas Timm
- Protein Analytics, Institute of Biochemistry, Justus Liebig University Giessen, Germany
| | - Günter Lochnit
- Protein Analytics, Institute of Biochemistry, Justus Liebig University Giessen, Germany
| | - Georg A Rennar
- Department of Pharmaceutical Chemistry, Philipps Universität Marburg, Germany, Germany
| | - Tom L Gallinger
- Department of Pharmaceutical Chemistry, Philipps Universität Marburg, Germany, Germany
| | - Hicham Houhou
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Stefan Rahlfs
- Institute for Biochemistry and Molecular Biology, Interdisciplinary Research Centre, Justus Liebig University, Germany
| | - Franco H Falcone
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Katja Becker
- Institute for Biochemistry and Molecular Biology, Interdisciplinary Research Centre, Justus Liebig University, Germany
| | - Martin Schlitzer
- Department of Pharmaceutical Chemistry, Philipps Universität Marburg, Germany, Germany
| | - Simone Haeberlein
- Institute of Parasitology, BFS, Justus Liebig University Giessen, Germany
| | - Peter Czermak
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - Denise Salzig
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
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Silva ML, de Santiago-Silva KM, Fabris M, Camargo PG, de Lima Ferreira Bispo M. Proteasome as a Drug Target in Trypanosomatid Diseases. Curr Drug Targets 2023; 24:781-789. [PMID: 37469152 DOI: 10.2174/1389450124666230719104147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/14/2023] [Accepted: 06/21/2023] [Indexed: 07/21/2023]
Abstract
Some diseases caused by trypanosomatid parasites, like Leishmaniasis, Chagas Disease, and Human African Trypanosomiasis (HTA), are challenging to manage, mainly concerning pharmacological therapy because they are associated with vulnerable populations. Unfortunately, there is a lack of significant investments in the search for new drugs. Therefore, one of the strategies to aid the discovery of new drugs is to identify and inhibit molecular targets essential to the parasite's survival, such as the proteasome, which degrades most proteins in the parasite cells. Our study has presented several proteasome inhibitors with various pharmacophoric cores, and two of them, 5, and 13, have stood out in the clinical phase of treatment for leishmaniasis.
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Affiliation(s)
- Mariana Luiza Silva
- Laboratório de Síntese de Moléculas Medicinais (LaSMMed), Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Kaio Maciel de Santiago-Silva
- Laboratório de Síntese de Moléculas Medicinais (LaSMMed), Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Marciéli Fabris
- Laboratório de Síntese de Moléculas Medicinais (LaSMMed), Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Priscila Goes Camargo
- Laboratório de Síntese de Moléculas Medicinais (LaSMMed), Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Marcelle de Lima Ferreira Bispo
- Laboratório de Síntese de Moléculas Medicinais (LaSMMed), Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, Brazil
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Mewara A, Gudisa R, Padhi BK, Kumar P, Sah R, Rodriguez-Morales AJ. Visceral leishmaniasis outbreak in Kenya-a setback to the elimination efforts. New Microbes New Infect 2022; 49-50:101060. [PMID: 36504911 PMCID: PMC9730213 DOI: 10.1016/j.nmni.2022.101060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022] Open
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Alo C, Okedo-Alex IN, Akamike IC, Agu AP, Okeke IM, Amuzie CI, Alo NC. Utilising community volunteers can increase the detection and referral of Buruli ulcer cases in endemic communities in Southeast, Nigeria. Trop Dis Travel Med Vaccines 2022; 8:24. [PMID: 36316742 PMCID: PMC9623928 DOI: 10.1186/s40794-022-00181-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 09/12/2022] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Buruli ulcer (BU) is a debilitating neglected tropical disease which causes disability and mostly affects inhabitants in impoverished settings where access to medical care is challenging. This study aims to determine the effect of training community members as volunteers for or in the detection and referral of people who have Buruli ulcer to the hospital. METHODS The following study is a before and after study in the BU-endemic Local Government Areas (LGA) of Ebonyi State. A cluster random sampling technique was used to select 90 volunteers from three LGAs (30 from each LGA). In each LGA, the volunteers underwent a one-day training and six months field work to identify all those who have any form of ulcer on any part of their bodies. A short questionnaire was used to capture socio-demographic characteristics of the patient, site of the ulcer, duration of the ulcer, initial appearance of the ulcer, referral to hospital, result of laboratory investigation, and treatment received. The data was analysed using the Statistical Package for Social Sciences (SPSS) for Microsoft Windows version 20 software. The Z test statistic was used to compare the number of referred BU patients before and after the intervention by LGA. The Chi square test was used to examine the association between the dependent and independent variables. RESULTS The mean age of volunteers was 39 ± 9.5 while mean age of the patients was 42.3 ± 17.1. Most of the ulcers were on the legs (79.4%) and lasted 1-5 years (65.6%). There was a significant increase in the proportion of BU suspects identified by the community volunteers in all 3 LGAs (Afikpo north (p = < 0.001), Abakaliki (p = 0.02), Ikwo (p = 0.001). The duration of the ulcer was associated with the detection and referral of the patients with higher levels of detection and referral among those whose ulcer had lasted 1-5 years in two of the LGAs (P < 0.001). CONCLUSION We recommend that program managers and stakeholders integrate and scale up the services of trained community health volunteers for the rapid detection of Buruli ulcer cases in rural endemic communities. Awareness and sensitization campaigns on BU preventive measures should be intensified.
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Affiliation(s)
- Chihurumnanya Alo
- grid.412141.30000 0001 2033 5930Department of Community Medicine, Faculty of Medicine, Ebonyi State University, Ebonyi State, Abakaliki, Nigeria ,Department of Community Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakaliki, Ebonyi State Nigeria
| | - Ijeoma Nkem Okedo-Alex
- Department of Community Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakaliki, Ebonyi State Nigeria ,grid.412141.30000 0001 2033 5930African Institute for Health Policy and Health Systems, Ebonyi State University (EBSU) Abakaliki, Abakaliki,, Nigeria
| | - Ifeyinwa Chizoba Akamike
- Department of Community Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakaliki, Ebonyi State Nigeria ,grid.412141.30000 0001 2033 5930African Institute for Health Policy and Health Systems, Ebonyi State University (EBSU) Abakaliki, Abakaliki,, Nigeria
| | - Adaoha Pearl Agu
- grid.412141.30000 0001 2033 5930Department of Community Medicine, Faculty of Medicine, Ebonyi State University, Ebonyi State, Abakaliki, Nigeria ,Department of Community Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakaliki, Ebonyi State Nigeria ,grid.412141.30000 0001 2033 5930Department of Community Medicine, Ebonyi State University Abakaliki, Abakaliki, Ebonyi State Nigeria
| | - Ifeyinwa Maureen Okeke
- Department of Community Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakaliki, Ebonyi State Nigeria
| | - Chidinma Ihuoma Amuzie
- grid.414819.1Department of Community Medicine, Federal Medical Centre, Umuahia, Abia State Nigeria ,Nigeria Field Epidemiology Training Program, Abuja, Nigeria
| | - Nneamaka C. Alo
- Department of Family Medicine, Alex Ekwueme Federal University Teaching Hospital Abakaliki, Abakalik, Ebonyi State Nigeria
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Kushwaha V, Capalash N. Aminoacyl-tRNA synthetase (AARS) as an attractive drug target in neglected tropical trypanosomatid diseases-Leishmaniasis, Human African Trypanosomiasis and Chagas disease. Mol Biochem Parasitol 2022; 251:111510. [PMID: 35988745 DOI: 10.1016/j.molbiopara.2022.111510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 10/15/2022]
Abstract
TriTryp diseases (Leishmaniasis, Human African Trypanosomiasis (HAT), and Chagas disease) are devastating parasitic neglected tropical diseases (NTDs) that affect billions of people in developing countries, cause high mortality in humans, and impose a large socio-economic burden. The current treatment options against tritryp diseases are suboptimal and challenging due to the emergence of resistance against available tritryp drugs. Hence, designing and developing effective anti-tritryp drugs with novel targets are required. Aminoacyl-tRNA synthetases (AARSs) involved in specific aminoacylation of transfer RNAs (tRNAs), interrupt protein synthesis through inhibitors, and retard the parasite growth. AaRSs have long been studied as therapeutic targets in bacteria, and three aaRS inhibitors, mupirocin (against IleRS), tavaborole AN2690 (against LeuRS), and halofuginone (against ProRS), are already in clinical practice. The structural differences between tritryp and human aaRSs and the presence of unique sequences (N-terminal domain/C-terminal domain/catalytic domain) make them potential target for developing selective inhibitors. Drugs based on a single aaRS target developed by high-throughput screening (HTS) are less effective due to the emergence of resistance. However, designing multi-targeted drugs may be a better strategy for resistance development. In this perspective, we discuss the characteristics of tritryp aaRSs, sequence conservation in their orthologs and their peculiarities, recent advancements towards the single-target and multi-target aaRS inhibitors developed through rational design.
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Affiliation(s)
- Vikas Kushwaha
- Department of Biotechnology, Panjab University, Sector-25, South Campus, Chandigarh 160025, India.
| | - Neena Capalash
- Department of Biotechnology, Panjab University, Sector-25, South Campus, Chandigarh 160025, India.
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de Oca-Aguilar ACM, Rebollar-Téllez EA, Sosa-Bibiano EI, López-Avila KB, Torres-Castro JR, Loría-Cervera EN. Effect of land use change on the phlebotomine sand fly assemblages in an emergent focus of cutaneous leishmaniasis in Yucatan, Mexico. Acta Trop 2022; 235:106628. [PMID: 35952923 DOI: 10.1016/j.actatropica.2022.106628] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/14/2022] [Accepted: 07/28/2022] [Indexed: 11/01/2022]
Abstract
As land use intensifies in tropical forests, it is expected that species assemblages will be modified and that key functions of these ecosystems will be affected. The latter scenario is important from a public health perspective, because the land use change has been linked the outbreaks of vector-borne diseases. In this study, we evaluated the response of Phlebotominae (Diptera: Psychodidae) assemblages and their pattern of co-occurrence in four sites with different land use in an emerging cutaneous leishmaniasis focus in Yucatan, Mexico. Our hypothesis is that the conservation status (as forest cover) will positively influence the structure and composition of sand flies' assemblages. Using three different traps over a period of five months, a sampling effort of 1, 440 night-traps was performed. A total of 7, 897 sand fly specimens belonging to six genera and 10 species were collected. Our hypothesis was partially achieved since sand fly diversity increased as forest cover increased and vice versa, however random patterns of co-occurrence in assemblages were detected among sites. Even though the high abundance of sand flies in the forest fragment suggests an amplification effect, our results show that different vector species directly dominate in each site. We discuss the potential implications of the nestedness of species dominance. We suggest that in this emerging focus and under the land use gradient, Lutzomyia cruciata and Psathyromyia cratifer could play a pivotal role in maintaining the transmission cycles of Leishmania. The apparent generalist or colonialist profile of Lu. cruciata in disturbed areas deserves attention, due to the potential risk of leishmaniasis "domiciliation". This information is essential to understand the eco-epidemiology of leishmaniasis and the factors associated with its emergence in Yucatan, Mexico.
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Affiliation(s)
- A C Montes de Oca-Aguilar
- Laboratorio de inmunología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mexico.
| | - E A Rebollar-Téllez
- Laboratorio de Entomología Médica, Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Mexico
| | - E I Sosa-Bibiano
- Laboratorio de inmunología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mexico
| | - K B López-Avila
- Laboratorio de inmunología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mexico
| | - J R Torres-Castro
- Dirección de Prevención y Protección de la Salud de los Servicios de Salud del Estado de Yucatán, Mexico
| | - E N Loría-Cervera
- Laboratorio de inmunología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mexico
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Gwayi-Chore MC, Aruldas K, Avokpaho E, Chirambo CM, Kaliappan SP, Houngbégnon P, Togbevi CI, Chabi F, Nindi P, Simwanza J, Johnson J, Miech EJ, Kalua K, Ibikounlé M, Ajjampur SSR, Weiner BJ, Walson JL, Means AR. Defining optimal implementation packages for delivering community-wide mass drug administration for soil-transmitted helminths with high coverage. BMC Health Serv Res 2022; 22:792. [PMID: 35717193 PMCID: PMC9206125 DOI: 10.1186/s12913-022-08080-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/13/2022] [Indexed: 11/21/2022] Open
Abstract
Background Recent evidence suggests that community-wide mass drug administration (MDA) may interrupt the transmission of soil-transmitted helminths (STH), a group of intestinal worms that infect 1.5 billion individuals globally. Although current operational guidelines provide best practices for effective MDA delivery, they do not describe which activities are most essential for achieving high coverage or how they work together to produce effective intervention delivery. We aimed to identify the various packages of influential intervention delivery activities that result in high coverage of community-wide MDA for STH in Benin, India, and Malawi. Methods We applied coincidence analysis (CNA), a novel cross-case analytical method, to process mapping data as part of the implementation science research of the DeWorm3 Project, a Hybrid Type 1 cluster randomized controlled trial assessing the feasibility of interrupting the transmission of STH using bi-annual community-wide MDA in Benin, India, and Malawi. Our analysis aimed to identify any necessary and/or sufficient combinations of intervention delivery activities (i.e., implementation pathways) that resulted in high MDA coverage. Activities were related to drug supply chain, implementer training, community sensitization strategy, intervention duration, and implementation context. We used pooled implementation data from three sites and six intervention rounds, with study clusters serving as analytical cases (N = 360). Secondary analyses assessed differences in pathways across sites and over intervention rounds. Results Across all three sites and six intervention rounds, efficient duration of MDA delivery (within ten days) singularly emerged as a common and fundamental component for achieving high MDA coverage when combined with other particular activities, including a conducive implementation context, early arrival of albendazole before the planned start of MDA, or a flexible community sensitization strategy. No individual activity proved sufficient by itself for producing high MDA coverage. We observed four possible overall models that could explain effective MDA delivery strategies, all which included efficient duration of MDA delivery as an integral component. Conclusion Efficient duration of MDA delivery uniquely stood out as a highly influential implementation activity for producing high coverage of community-wide MDA for STH. Effective MDA delivery can be achieved with flexible implementation strategies that include various combinations of influential intervention components. Supplementary Information The online version contains supplementary material available at 10.1186/s12913-022-08080-5.
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Affiliation(s)
- Marie-Claire Gwayi-Chore
- Department of Global Health, University of Washington, Seattle, USA. .,The DeWorm3 Project, University of Washington, Seattle, WA, USA.
| | - Kumudha Aruldas
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | | | | | | | | | | | - Félicien Chabi
- Institut de Recherche Clinique du Benin, Abomey-Calavi, Benin
| | - Providence Nindi
- Blantyre Institute for Community Outreach (BICO), Lions Sight First Eye Hospital, Blantyre, Malawi
| | - James Simwanza
- Blantyre Institute for Community Outreach (BICO), Lions Sight First Eye Hospital, Blantyre, Malawi
| | - Jabaselvi Johnson
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Edward J Miech
- Center for Health Services Research, Regenstrief Institute, Indianapolis, USA
| | - Khumbo Kalua
- Blantyre Institute for Community Outreach (BICO), Lions Sight First Eye Hospital, Blantyre, Malawi.,Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Moudachirou Ibikounlé
- Institut de Recherche Clinique du Benin, Abomey-Calavi, Benin.,Centre de Recherche pour la Lutte Contre les Maladies Infectieuses Tropicales, Université d'Abomey-Calavi, Abomey-Calavi, Bénin
| | - Sitara S R Ajjampur
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Bryan J Weiner
- Department of Global Health, University of Washington, Seattle, USA
| | - Judd L Walson
- Department of Global Health, University of Washington, Seattle, USA.,The DeWorm3 Project, University of Washington, Seattle, WA, USA.,Departments of Medicine, Pediatrics, & Epidemiology, University of Washington, Seattle, USA
| | - Arianna Rubin Means
- Department of Global Health, University of Washington, Seattle, USA.,The DeWorm3 Project, University of Washington, Seattle, WA, USA
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Tan CH, Oh AMF, Wong KY, Liew JL, Tan NH, Tan KY. On characterizing the Red-headed Krait (Bungarus flaviceps) venom: Decomplexation proteomics, immunoreactivity and toxicity cross-neutralization by hetero-specific antivenoms. Comp Biochem Physiol Part D Genomics Proteomics 2022; 43:101006. [PMID: 35717758 DOI: 10.1016/j.cbd.2022.101006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 05/31/2022] [Accepted: 06/03/2022] [Indexed: 12/26/2022]
Abstract
The Red-headed Krait (Bungarus flaviceps) is a medically important venomous snake species in Southeast Asia, while there is no specific antivenom available for its envenoming. This study investigated the venom composition through a decomplexation proteomic approach, and examined the immunoreactivity as well as cross-neutralization efficacy of two hetero-specific krait antivenoms, Bungarus candidus Monovalent Antivenom (BcMAV) and Bungarus fasciatus Monovalent Antivenom (BfMAV), against the venom of B. flaviceps from Peninsular Malaysia. A total of 43 non-redundant proteoforms belonging to 10 toxin families were identified in the venom proteome, which is dominated by phospholipases A2 including beta-bungarotoxin lethal subunit (56.20 % of total venom proteins), Kunitz-type serine protease inhibitors (19.40 %), metalloproteinases (12.85 %) and three-finger toxins (7.73 %). The proteome varied in quantitative aspect from the earlier reported Indonesian (Sumatran) sample, suggesting geographical venom variation. BcMAV and BfMAV were immunoreactive toward the B. flaviceps venom, with BcMAV being more efficacious in immunological binding. Both antivenoms cross-neutralized the venom lethality with varying efficacy, where BcMAV was more potent than BfMAV by ~13 times (normalized potency: 38.04 mg/g vs. 2.73 mg/g, defined as the venom amount completely neutralized by one-gram antivenom protein), supporting the potential utility of BcMAV for para-specific neutralization against B. flaviceps venom.
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Tantengco OAG, Rojo RD. Bibliometric analysis of schistosomiasis research in Southeast Asia (1908-2020). Acta Trop 2022; 228:106322. [PMID: 35065014 DOI: 10.1016/j.actatropica.2022.106322] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 01/15/2022] [Accepted: 01/18/2022] [Indexed: 12/17/2022]
Abstract
OBJECTIVES This study determined the characteristics and trends of published articles regarding schistosomiasis in Southeast Asian countries through a bibliometric analysis. METHODS Using the Scopus database, we identified all original research articles on schistosomiasis from 1908 to 2020 from SEA countries: Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, Philippines, Singapore, Thailand, and Vietnam. Bibliographic and citation information was obtained, and visualization of collaboration networks of countries and keywords related to schistosomiasis was conducted using VOSviewer software. RESULTS We obtained 528 schistosomiasis articles published between 1908 and 2020 from SEA countries. The number of publications continued to increase and peaked from 2000 until 2020. The Philippines had the highest number of publications (n = 231), followed by Thailand (n = 153), and Malaysia (n = 64). The leading journals with the highest number of publications in this field include the Southeast Asian Journal of Tropical Medicine and Public Health (n = 96), Acta Tropica (n = 27), and Plos Neglected Tropical Diseases (n = 24). The most common keywords related to schistosomiasis research in SEA were "schistosomiasis", "Schistosoma japonicum", "Schistosoma mekongi", "Schistosoma mansoni", and "praziquantel". International collaboration was significantly correlated with scientific productivity for schistosomiasis research. CONCLUSION Our study showed the research landscape, trends and development, and collaboration among researchers in schistosomiasis in SEA. Our results also revealed the limited schistosomiasis research in several SEA countries. There is a need for more research to improve our understanding of the epidemiology of schistosomiasis in SEA, which can help in improving the control and prevention of this disease.
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Wampande LN, Nyabuga LM, Fowler K, Okengwu GC, Bayisenge U, Schurer JM. Podoconiosis instruction at nursing schools in Kenya, Rwanda, and Uganda. Trop Med Health 2022; 50:14. [PMID: 35148785 PMCID: PMC8831868 DOI: 10.1186/s41182-022-00405-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/27/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Podoconiosis is a preventable, progressive, and non-infectious form of elephantiasis that can contribute to significant disability and economic burden when not treated early. Nurses play a critical role in early detection and response in rural Africa, but it is unclear if they receive adequate training on podoconiosis. We aimed to characterize podoconiosis instruction at all government accredited, post-secondary nursing institutions in three African countries. METHODS Data for this cross-sectional study was collected through a quantitative survey with several open-answer questions. Through a rigorous online search, we identified all post-secondary institutions in Kenya, Rwanda and Uganda accredited to teach human nursing. A total of 289 accredited programs, including 85 certificate, 56 degree and 148 diploma programs were invited to participate. Respondents completed surveys online or by telephone. Measures focused on podoconiosis knowledge, perceptions of quality/quantity of podoconiosis instruction, and barriers to sufficient podoconiosis education. RESULTS We obtained information about 212 curricula across 149 nursing institutions in the three countries (participation rate: 73.4%). Podoconiosis coverage was limited across programs (certificate-24.1%; diploma-55.6%; degree-30.3%). Most respondents felt that the quality and quantity of instruction were insufficient (60.6%, 62.9%), respectively. Exclusion from government curricula, low priority and faculty lack of knowledge were commonly reported barriers to podoconiosis inclusion. CONCLUSIONS This study demonstrated clear gaps in podoconiosis training for nurses across the three countries and highlights a serious challenge in eliminating podoconiosis as a public health problem. Interventions to improve nurses' knowledge could include the development and free distribution of podoconiosis teaching materials, designed for integration into pre-existing courses.
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Affiliation(s)
| | | | - Kelly Fowler
- Center for One Health, University of Global Health Equity, Butaro, Rwanda
| | | | - Ursin Bayisenge
- Center for One Health, University of Global Health Equity, Butaro, Rwanda
| | - Janna M Schurer
- Center for One Health, University of Global Health Equity, Butaro, Rwanda. .,Department of Global Health and Infectious Disease, Cummings School of Veterinary Medicine, North Grafton, USA.
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Akinokun RT, Ilesanmi EB, Adebisi YA, Akingbade O. The status of neglected tropical diseases amidst COVID-19 in Africa: Current evidence and recommendations. Health Promot Perspect 2022; 11:430-433. [PMID: 35079586 PMCID: PMC8767084 DOI: 10.34172/hpp.2021.53] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/20/2021] [Indexed: 12/29/2022] Open
Abstract
Health care services and programs directed towards combating the neglected tropical diseases (NTDs) have been disrupted because of the impact of the coronavirus disease 2019 (COVID-19). The African continent because of its staggering health care system and poor economy disproportionately bears the burden of these diseases. While successes have been recorded in controlling and eliminating the NTDs, policymakers in Africa should consider the potential of the COVID-19 to dwindle these successes an issue of high priority. This commentary seeks to discuss the current status of NTDs in Africa and proffer recommendations to help combat these diseases at this period. It is worthy to say that similar dedication directed towards fighting the COVID-19 should also be deployed into eliminating other diseases like the NTDs which often, are neglected.
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Affiliation(s)
- Rafiat Tolulope Akinokun
- Faculty of Nursing Science, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.,Institute of Nursing Research, Nigeria
| | | | | | - Oluwadamilare Akingbade
- Institute of Nursing Research, Nigeria.,The Nethersole School of Nursing, Chinese University of Hong Kong, Shatin, Hong Kong
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Erber AC, Sandler PJ, de Avelar DM, Swoboda I, Cota G, Walochnik J. Diagnosis of visceral and cutaneous leishmaniasis using loop-mediated isothermal amplification (LAMP) protocols: a systematic review and meta-analysis. Parasit Vectors 2022; 15:34. [PMID: 35073980 PMCID: PMC8785018 DOI: 10.1186/s13071-021-05133-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/16/2021] [Indexed: 12/13/2022] Open
Abstract
Sensitive, reliable and fast diagnostic tools that are applicable in low-resource settings, at the point of care (PoC), are seen as crucial in the fight against visceral leishmaniasis (VL) and cutaneous leishmaniasis (CL). Addressing the need for a PoC test, several diagnostic tests, including serological and molecular methods, have been developed and evaluated in the past. One promising molecular method, already implemented for diagnosis of a range of diseases, is the loop-mediated isothermal amplification (LAMP) protocol. In this systematic review and meta-analysis, using a comprehensive search strategy, we focus on studies evaluating the performance of LAMP for the diagnosis of leishmaniasis in humans and other mammals such as dogs, compared with microscopy and/or any other molecular diagnostic method. A meta-analysis, pooling sensitivity and specificity rates and calculating areas under the curve (AUCs) in summary receiver operating characteristic (SROC) plots, was conducted on datasets extracted from studies, grouped by clinical condition and sample type. We found high sensitivity and specificity for LAMP when compared with microscopy and PCR using blood samples, with pooled estimate values of > 90% for all subgroups, corresponding to calculated AUC values > 0.96, except for LAMP compared to microscopy for diagnosis of CL. However, only a limited number of studies were truly comparable. Most of the observed heterogeneity is likely based on true differences between the studies rather than sampling error only. Due to simple readout methods and low laboratory equipment requirements for sample preparation compared to other molecular methods, LAMP is a promising candidate for a molecular (near-)PoC diagnostic method for VL and CL.
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Affiliation(s)
- Astrid Christine Erber
- Department of Epidemiology, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1st floor, 1090, Vienna, Austria. .,Nuffield Department of Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, New Richards Building, Old Road Campus, Roosevelt Drive, Oxford, OX3 7LG, UK.
| | - Peter Julian Sandler
- Department of Applied Life Sciences, FH Campus Wien University of Applied Sciences, Helmut-Qualtinger Gasse 2, 1030, Vienna, Austria
| | - Daniel Moreira de Avelar
- Pesquisa Clínica e Políticas Públicas em Doenças Infecciosas e Parasitárias, Instituto René Rachou-Fundação Oswaldo Cruz, Fiocruz, Belo Horizonte, Minas Gerais, Brazil
| | - Ines Swoboda
- Department of Applied Life Sciences, FH Campus Wien University of Applied Sciences, Helmut-Qualtinger Gasse 2, 1030, Vienna, Austria
| | - Gláucia Cota
- Pesquisa Clínica e Políticas Públicas em Doenças Infecciosas e Parasitárias, Instituto René Rachou-Fundação Oswaldo Cruz, Fiocruz, Belo Horizonte, Minas Gerais, Brazil
| | - Julia Walochnik
- Institute of Specific Prophylaxis and Tropical Medicine, Medical University of Vienna, Kinderspitalgasse 15, 1090, Vienna, Austria
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Eslahi AV, Hashemipour S, Olfatifar M, Houshmand E, Hajialilo E, Mahmoudi R, Badri M, Ketzis JK. Global prevalence and epidemiology of Strongyloides stercoralis in dogs: a systematic review and meta-analysis. Parasit Vectors 2022; 15:21. [PMID: 35012614 PMCID: PMC8750836 DOI: 10.1186/s13071-021-05135-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 12/16/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Strongyloides stercoralis, a soil-transmitted helminth, occurs in humans, non-human primates, dogs, cats and wild canids. The zoonotic potential between these hosts is not well understood with data available on prevalence primarily focused on humans. To increase knowledge on prevalence, this review and meta-analysis was performed to estimate the global status of S. stercoralis infections in dogs. METHODS Following the PRISMA guidelines, online literature published prior to November 2020 was obtained from multiple databases (Science Direct, Web of Science, PubMed, Scopus and Google Scholar). Prevalence was calculated on a global and country level, by country income and climate, and in stray/animal shelter dogs versus owned dogs. Statistical analyses were conducted using R-software (version 3.6.1). RESULTS From 9428 articles, 61 met the inclusion criteria. The estimated pooled global prevalence of S. stercoralis in dogs was 6% (95% CI 3-9%). Infection was found to be the most prevalent in low-income countries with pooled prevalence of 22% (95% CI 10-36%). The highest pooled prevalence of S. stercoralis in dogs was related to regions with average temperature of 10-20 °C (6%; 95% CI 3-11%), an annual rainfall of 1001-1500 mm (9%; 95% CI 4-15%) and humidity of 40-75% (8%; 95% CI 4-13%). Prevalence was higher in stray and shelter dogs (11%; 95% CI 1-26%) than in owned dogs (3%; 95% CI 1-7%). CONCLUSIONS As with S. stercoralis in humans, higher prevalence in dogs is found in subtropical and tropical regions and lower-income countries, locations which also can have high dog populations. While this study presents the first estimated global prevalence of S. stercoralis in dogs, it is potentially an underestimation with 15 of 61 studies relying on diagnostic methods of lower sensitivity and a paucity of data from most locations. Standardized protocols (e.g. quantity of feces and number of samples for a Baermann) in future studies could improve reliability of results. More prevalence studies and raising veterinary awareness of S. stercoralis are needed for a One Health approach to protect humans and dogs from the impact of the infection.
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Affiliation(s)
- Aida Vafae Eslahi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Sima Hashemipour
- Metabolic Diseases Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Meysam Olfatifar
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Elham Houshmand
- Department of Parasitology, Faculty of Veterinary Medicine, Rasht Branch, Islamic Azad University, Guilan, Iran
| | - Elham Hajialilo
- Department of Parasitology and Mycology, Qazvin University of Medical Sciences, Qazvin, Iran.,Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Razzagh Mahmoudi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Milad Badri
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Jennifer K Ketzis
- Ross University School of Veterinary Medicine, Basseterre, West Indies, St. Kitts and Nevis.
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Badri M, Olfatifar M, Wandra T, Budke CM, Mahmoudi R, Abdoli A, Hajialilo E, Pestehchian N, Ghaffarifar F, Foroutan M, Hashemipour S, Sotoodeh S, Samimi R, Eslahi AV. The prevalence of human trichuriasis in Asia: a systematic review and meta-analysis. Parasitol Res 2022; 121:1-10. [PMID: 34993634 DOI: 10.1007/s00436-021-07365-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/27/2021] [Indexed: 11/30/2022]
Abstract
Trichuriasis is one of the most common soil-transmitted helminth (STH) infections, affecting populations globally. The condition is particularly prevalent in tropical and subtropical areas with low levels of sanitation and poor living conditions. The objective of this systematic review and meta-analysis was to evaluate the prevalence of Trichuris trichiura infection in Asia at the country and region level. Multiple databases/academic search engines (Web of Science, PubMed, ProQuest, Scopus, and Google Scholar) were searched for literature on T. trichiura prevalence in Asia published through January 2021. Pooled prevalence was determined using the meta-package in R (version 3.6.1). Out of 13,836 articles, 226 studies (5,439,500 individuals) from 26 countries met the inclusion criteria. Of the 226 studies, 151 were community-based studies that included individuals across the age spectrum, while 75 studies focused on school children (typically in the 5-16 years age range). The overall T. trichiura pooled prevalence was 15.3% (95% CI: 12.4-19.1%), with a pooled prevalence of 13.3% (95% CI: 10.0-17.1%) for the community studies and 20.9% (95% CI: 14.7-27.9%) for the studies only including school children. For studies including all age groups, individuals in the 1-15 years age group had the highest pooled prevalence at 23.4% (95% CI: 1.7-49.4%). There was a significant difference found in overall pooled prevalence by sex (p < 0.001) and community type (rural versus urban) (p < 0.001). Although prevalence appears to be decreasing, study findings suggest that T. trichiura infection continues to be a public health problem in Asia. Therefore, control programs focused on at-risk individuals in endemic areas are needed.
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Affiliation(s)
- Milad Badri
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Meysam Olfatifar
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Toni Wandra
- Directorate of Postgraduate, Sari Mutiara Indonesia University, Medan, Indonesia
| | - Christine M Budke
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A & M University, College Station, TX, USA
| | - Razzagh Mahmoudi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Amir Abdoli
- Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Elham Hajialilo
- Department of Parasitology and Mycology, Qazvin University of Medical Sciences, Qazvin, Iran.,Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Nader Pestehchian
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ghaffarifar
- Department of Parasitology and Entomology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Foroutan
- Research Center for Environmental Contaminants (RCEC), Abadan University of Medical Sciences, Abadan, Iran
| | - Sima Hashemipour
- Metabolic Diseases Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Simin Sotoodeh
- Clinical Research Development Unit, Kosar Hospital, Qazvin University Of Medical Sciences, Qazvin, Iran
| | - Rasoul Samimi
- Children Growth Research Center Research Institute for Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Aida Vafae Eslahi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
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Gomes ECDS, Silva IEPD, Nascimento WRCD, Loyo RM, Domingues ALC, Barbosa CS. Urban schistosomiasis: An ecological study describing a new challenge to the control of this neglected tropical disease. Lancet Reg Health Am 2021; 8:100144. [PMID: 36778731 PMCID: PMC9904042 DOI: 10.1016/j.lana.2021.100144] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Background Social and environmental vulnerabilities contribute to the persistence and increase of Schistosomiasis, which has been a public health problem in Brazil and worldwide. In this study, we aimed to monitor the entry, installation, and maintenance of schistosomiasis transmission in an urban area on the Brazilian coast over two decades (2000-2010/2010-2020). Methods This population-based cross-sectional study was conducted in Porto de Galinhas, state of Pernambuco, Brazil, to investigate the dynamics of schistosomiasis transmission in the urban area. Through 3 malacological and parasitological surveys and using geoprocessing technologies, schistosomiasis transmission foci (STF), as well as cases of the disease were identified and quantified. Statistical and geoprocessing tools were used to analyse the data. Findings Overall, the number of STF decreased from 15 (2000) to 11 (2010) and then to 9 (2020). Although the infection ratio of snails in 2000 has decreased from 16·1% to 5·8% in 2010, we observed an increase to 7·2% in 2020. Additionally, 6,499 individuals were analysed (2012 in 2000; 2459 in 2010, and 2028 in 2020) and the prevalence of human infection has decreased over years, from 32·5% (2000), 16·6% (2010) to 8·8% (2020). The disorderly urbanization process was directly related to the spatial distribution of STF and schistosomiasis cases, causing a new scenario where people became infected by walking on unpaved and flooded streets. Interpretation Although we observed a decreasing in schistosomiasis cases and STF, this NTD became a health problem related to urbanization in the study area. The challenge to overcome this new sort of transmission will require a greater understanding of the disorderly migration, spatial occupation, and degradation of the environment. Funding National Council for Scientific and Technological Development (CNPq), Ministry of Science, Technology, Innovations and Communications, Brazil.
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Affiliation(s)
- Elainne Christine de Souza Gomes
- Schistosomiasis Reference Laboratory, Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Recife, PE, Brazil.,Corresponding author.
| | - Iris Edna Pereira da Silva
- Schistosomiasis Reference Laboratory, Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Recife, PE, Brazil
| | - Wheverton Ricardo Correia do Nascimento
- Schistosomiasis Reference Laboratory, Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Recife, PE, Brazil.,Department of Tropical Medicine, Federal University of Pernambuco, Recife, PE, Brazil
| | - Rodrigo Moraes Loyo
- Schistosomiasis Reference Laboratory, Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Recife, PE, Brazil
| | | | - Constança Simões Barbosa
- Schistosomiasis Reference Laboratory, Department of Parasitology, Aggeu Magalhães Institute, Fiocruz - Ministry of Health, Recife, PE, Brazil
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Becker SL, Weber SF, de Forest A, Phiri S, Förster P, Nhlema A, Denkinger CM, Nimmesgern A, Neuhann F. Application of a POCCCA rapid diagnostic test and serology for detection of schistosomiasis in HIV-positive individuals in urban Malawi. Acta Trop 2021; 224:106142. [PMID: 34562420 DOI: 10.1016/j.actatropica.2021.106142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 08/07/2021] [Accepted: 09/12/2021] [Indexed: 11/20/2022]
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Dingwoke EJ, Adamude FA, Mohamed G, Klein A, Salihu A, Abubakar MS, Sallau AB. Venom proteomic analysis of medically important Nigerian viper Echis ocellatus and Bitis arietans snake species. Biochem Biophys Rep 2021; 28:101164. [PMID: 34765747 DOI: 10.1016/j.bbrep.2021.101164] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/13/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022] Open
Abstract
Snakebite envenoming remains a neglected tropical disease which poses severe health hazard, especially for the rural inhabitants in Africa. In Nigeria, vipers are responsible for the highest number of deaths. Hydrophilic interaction liquid chromatography coupled with LC-MS/MS was used to analyze the crude venoms of Echis ocellatus (Carpet viper) and Bitis arietans (Puff adder) in order to understand their venom proteomic identities. Results obtained revealed that gel-free proteomic analysis of the crude venoms led to the identification of 85 and 79 proteins, respectively. Seventy-eight (78) proteins were common between the two snake species with a 91.8% similarity score. The identified proteins belong to 18 protein families in E. ocellatus and 14 protein families in B. arietans. Serine proteases (22.31%) and metalloproteinases (21.06%) were the dominant proteins in the venom of B. arietans; while metalloproteinases (34.84%), phospholipase A2s (21.19%) and serine proteases (15.50%) represent the major toxins in the E. ocellatus venom. Other protein families such as three-finger toxins and cysteine-rich venom proteins were detected in low proportions. This study provides an insight into the venom proteomic analysis of the two Nigerian viper species, which could be useful in identifying the toxin families to be neutralized in case of envenomation. Venom proteomic of Nigeria's most medically important snakes is presented. SVMP, SVSP and PLA2 were the major toxin families in E. ocellatus and B. arietans. The venom proteomes of these vipers displayed 91.8% similarity in composition.
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Brannigan JA, Wilkinson AJ. Drug discovery in leishmaniasis using protein lipidation as a target. Biophys Rev 2021; 13:1139-46. [PMID: 35035594 DOI: 10.1007/s12551-021-00855-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/14/2021] [Indexed: 01/03/2023] Open
Abstract
The leishmaniases are infectious diseases caused by a number of species of obligate intracellular protozoa of the genus Leishmania with disease manifesting as cutaneous, mucocutaneous and visceral forms. Despite being endemic in more than 80 countries and its being the cause of high morbidity and mortality, leishmaniasis remains a neglected tropical disease. Chemotherapy is the frontline treatment, but drugs in current use suffer from toxic side effects, difficulties in administration and extended treatment times - moreover, resistance is emerging. New anti-leishmanial drugs are a recognised international priority. Here, we review investigations into N-myristoyltransferase (NMT) as a potential drug target. NMT catalyses the co-translational transfer of a C14 fatty acid from myristoyl-CoA onto the N-terminal glycine residue of a significant subset of proteins in eukaryotic cells. This covalent modification influences the stability and interactions of substrate proteins with lipids and partner proteins. Structure-guided development of new lead compounds emerging from high-throughput screening campaigns targeting Leishmania donovani NMT has led to the discovery of potent inhibitors which have been used to gain insights into the role of protein myristoylation in these parasites and to validate NMT as a drug target.
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40
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Souza LS, Lins-Silva DH, Dorea-Bandeira I, Barouh JL, Tolentino A, Bandeira ID, Quarantini LC. Prevalence and factors associated with depression and anxiety in people living with HTLV-1: A systematic review with meta-analysis and meta-regression. Gen Hosp Psychiatry 2021; 73:54-63. [PMID: 34600354 DOI: 10.1016/j.genhosppsych.2021.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/11/2021] [Accepted: 08/27/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Human T-cell lymphotropic virus type-1 (HTLV-1) infection is a neglected tropical disease associated with many clinical manifestations, such as erythematous-scaling skin lesions, cutaneous lymphomas, and spastic paraparesis, which could be a potential cause of mental health concerns. This study investigates the prevalence of symptoms and diagnoses of depression and anxiety and its associated factors in people living with HTLV-1 (PLWH). METHOD A systematic review was performed in the Pubmed/MEDLINE, Embase, LILACS, and PsycINFO databases for original studies investigating symptoms of depression and anxiety and diagnoses of major depressive disorder and anxiety disorders in PLWH, and a random-effects meta-analysis with meta-regression was performed to obtain a summary frequency of symptoms and diagnoses of depression and anxiety. RESULTS Considering both symptoms and diagnoses, the pooled prevalence for depression was 35% (95% CI: 27 to 43) and for anxiety was 33% (95% CI: 23 to 45). Clinically significant symptoms were more prevalent than diagnosed disorders for depression (47% vs. 21%) and anxiety (44% vs. 11%). PLWH were more likely than seronegative controls to present symptoms and diagnoses of depression (pooled OR: 4.25; 95% CI: 2.7 to 6.68) and anxiety (pooled OR: 3.79; 95% CI: 2.6 to 5.52). Spastic paraparesis was significantly associated with symptoms and diagnoses of depression (pooled OR: 1.81; 95% CI: 1.11 to 2.95) and anxiety (pooled OR: 2.75; 95% CI 1.26 to 5.96). CONCLUSIONS PLWH present a much higher prevalence of symptoms and diagnoses of depression and anxiety than seronegative controls, which could be explained by social vulnerability or neurological impairment associated with spastic paraparesis. More studies comparing asymptomatic PLWH and seronegative controls are needed.
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Affiliation(s)
- Lucca S Souza
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil; Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria do Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Daniel H Lins-Silva
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil; Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria do Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Ingrid Dorea-Bandeira
- Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria do Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Tecnologia e Ciências, Salvador, Bahia, Brazil
| | - Judah L Barouh
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Arthur Tolentino
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Igor D Bandeira
- Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria do Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil; Programa de Pós-Graduação em Medicina e Saúde, Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Lucas C Quarantini
- Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria do Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil; Departamento de Neurociências e Saúde Mental, Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil.
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Amoako YA, Ackam N, Omuojine JP, Oppong MN, Owusu-Ansah AG, Boateng H, Abass MK, Amofa G, Ofori E, Okyere PB, Frimpong M, Bailey F, Molyneux DH, Phillips RO. Mental health and quality of life burden in Buruli ulcer disease patients in Ghana. Infect Dis Poverty 2021; 10:109. [PMID: 34404483 PMCID: PMC8367773 DOI: 10.1186/s40249-021-00891-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/02/2021] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Buruli ulcer disease (BUD) is a necrotic skin neglected tropical disease (NTD) that has both a mental and physical health impact on affected individuals. Although there is increasing evidence suggesting a strong association between neglected tropical diseases (NTDs) and mental illness, there is a relative lack of information on BUD's impact on the mental health and quality of life (QoL) of affected individuals in Ghana. This study is to assess the impact of BUD on mental health and quality of life of patients with active and past BUD infection, and their caregivers. METHODS We conducted a case control study in 3 BUD endemic districts in Ghana between August and November 2019. Face-to-face structured questionnaire-based interviews were conducted on BUD patients with active and past infection, as well as caregivers of BUD patients using WHO Quality of Life scale, WHO Disability Assessment Schedule, Self-Reporting Questionnaire, Buruli Ulcer Functional Limitation Score and Hospital Anxiety and Depression Scale data tools. Descriptive statistics were used to summarize the characteristics of the study participants. Participant groups were compared using student t test and chi-square (χ2) or Fisher's exact tests. Mean quality of life scores are reported with their respective 95% confidence intervals. Data was analysed using STATA statistical software. RESULTS Our results show that BUD patients with active and past infection, along with their caregivers, face significant levels of distress and mental health sequelae compared to controls. Depression (P = 0.003) was more common in participants with active (27%) and past BU infection (17%), compared to controls (0%). Anxiety was found in 42% (11/26) and 20% (6/29) of participants with active and past BUD infection compared to 14% (5/36) of controls. Quality of life was also significantly diminished in active BUD infection, compared to controls. In the physical health domain, mean QoL scores were 54 ± 11.1 and 56 ± 11.0 (95% CI: 49.5‒58.5 and 52.2‒59.7) respectively for participants with active infection and controls. Similarly in the psychological domain, scores were lower for active infection than controls [57.1 ± 15.2 (95% CI: 50.9‒63.2) vs 64.7 ± 11.6 (95% CI: 60.8‒68.6)]. Participants with past infection had high QoL scores in both physical [61.3 ± 13.5 (95% CI: 56.1‒66.5)] and psychological health domains [68.4 ± 14.6 (95% CI: 62.7‒74.0)]. CONCLUSIONS BUD is associated with significant mental health distress and reduced quality of life in affected persons and their caregivers in Ghana. There is a need for integration of psychosocial interventions in the management of the disease.
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Affiliation(s)
- Yaw Ampem Amoako
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. .,School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. .,Komfo Anokye Teaching Hospital, Kumasi, Ghana.
| | - Nancy Ackam
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Michael Ntiamoah Oppong
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Abena Gyawu Owusu-Ansah
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Harriet Boateng
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | | | | | - Portia Boakye Okyere
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Michael Frimpong
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Freddie Bailey
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - David Hurst Molyneux
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Richard Odame Phillips
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.,Komfo Anokye Teaching Hospital, Kumasi, Ghana
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Means AR, Orlan E, Gwayi-Chore MC, Titus A, Kaliappan SP, Togbevi CI, Chabi F, Halliday KE, Nindi P, Avokpaho E, Kalua K, Ibikounlé M, Ajjampur SSR, Weiner BJ, Walson JL, Aruldas K. Structural readiness to implement community-wide mass drug administration programs for soil-transmitted helminth elimination: results from a three-country hybrid study. Implement Sci Commun 2021; 2:80. [PMID: 34281614 PMCID: PMC8287777 DOI: 10.1186/s43058-021-00164-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 05/28/2021] [Indexed: 11/29/2022] Open
Abstract
Background Current soil-transmitted helminth (STH) control programs target pre-school and school-age children with mass drug administration (MDA) of deworming medications, reducing morbidity without interrupting ongoing transmission. However, evidence suggests that STH elimination may be possible if MDA is delivered to all community members. Such a change to the STH standard-of-care would require substantial systems redesign. We measured baseline structural readiness to launch community-wide MDA for STH in Benin, India, and Malawi. Methods After field piloting and adaptation, the structural readiness survey included two constructs: Organizational Readiness for Implementing Change and Organizational Capacity for Change. Sub-constructs of organizational readiness include change commitment and change efficacy. Sub-constructs of organizational capacity include flexibility, organizational structure, and demonstrated capacity. Survey items were also separately organized into seven implementation domains. Surveys were administered to policymakers, mid-level managers, and implementers in each country using a five-point Likert scale. Item, sub-construct, construct, and domain-level medians and interquartile ranges were calculated for each stakeholder level within each country. Results Median organizational readiness for change scores were highest in Malawi (5.0 for all stakeholder groups). In India, scores were 5.0, 4.0, and 5.0 while in Benin, scores were 4.0, 3.0, and 4.0 for policymakers, mid-level managers, and implementers, respectively. Median change commitment was equal to or higher than median change efficacy across all countries and stakeholder groups. Median organizational capacity for change was highest in India, with a median of 4.5 for policymakers and mid-level managers and 5.0 for implementers. In Malawi, the median capacity was 4.0 for policymakers and implementers, and 3.5 for mid-level managers. In Benin, the median capacity was 4.0 for policymakers and 3.0 for mid-level managers and implementers. Median sub-construct scores varied by stakeholder and country. Across countries, items reflective of the implementation domain ‘policy environment’ were highest while items reflective of the ‘human resource’ domain were consistently lower. Conclusion Across all countries, stakeholders valued community-wide MDA for STH but had less confidence in their collective ability to effectively implement it. Perceived capacity varied by stakeholder group, highlighting the importance of accounting for multi-level stakeholder perspectives when determining organizational preparedness to launch new public health initiatives. Trial registration NCT03014167
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Affiliation(s)
| | - Elizabeth Orlan
- Department of Global Health, University of Washington, Seattle, USA
| | | | - Angelin Titus
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | | | | | - Félicien Chabi
- Institut de Recherche Clinique du Benin, Abomey-Calavi, Benin
| | - Katherine E Halliday
- Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Providence Nindi
- Blantyre Institute for Community Outreach (BICO), Lions Sight First Eye Hospital, Blantyre, Malawi
| | | | - Khumbo Kalua
- Blantyre Institute for Community Outreach (BICO), Lions Sight First Eye Hospital, Blantyre, Malawi.,College of Medicine, University of Malawi, Blantyre, Malawi
| | - Moudachirou Ibikounlé
- Institut de Recherche Clinique du Benin, Abomey-Calavi, Benin.,Centre de Recherche pour la lutte contre les Maladies Infectieuses Tropicales (CReMIT/TIDRC), Université d'Abomey-Calavi, Abomey-Calavi, Benin
| | - Sitara S R Ajjampur
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Bryan J Weiner
- Department of Global Health, University of Washington, Seattle, USA
| | - Judd L Walson
- Department of Global Health, University of Washington, Seattle, USA
| | - Kumudha Aruldas
- The Wellcome Trust Research Laboratory, Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
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Lana JT, Mallipudi A, Ortiz EJ, Arevalo JH, Llanos-Cuentas A, Pan WK. Risk factors for cutaneous leishmaniasis in a high-altitude forest region of Peru. Trop Med Health 2021; 49:40. [PMID: 34001266 PMCID: PMC8130303 DOI: 10.1186/s41182-021-00332-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/06/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND American cutaneous leishmaniasis (CL) is a neglected tropical disease typically associated with men working in remote, sylvatic environments. We sought to identify CL risk factors in a highly deforested region where anecdotal reports suggested an atypical proportion of women and children were infected with CL raising concern among authorities that transmission was shifting towards domestic spaces and population centers. METHODS We describe the characteristics of CL patients from four participating clinics after digitizing up to 10 years of patient data from each clinic's CL registries. We assessed risk factors of CL associated with intradomestic, peridomestic, or non-domestic transmission through a matched case-control study with 63 patients who had visited these same clinics for CL (cases) or other medical reasons (controls) between January 2014 and August 2016. The study consisted of an in-home interview of participants by a trained field worker using a standard questionnaire. Risk factors were identified using bivariable and multivariable conditional logistic regression. RESULTS Between 2007 and 2016, a total of 529 confirmed CL positives were recorded in the available CL registries. Children and working aged women made up 58.6% of the cases. Our final model suggests that the odds of sleeping in or very near an agricultural field were five times greater in cases than controls (p = 0.025). Survey data indicate that women, children, and men have similar propensities to both visit and sleep in or near agricultural fields. CONCLUSIONS Women and children may be underappreciated as CL risk groups in agriculturally dependent regions. Despite the age-sex breakdown of clinical CL patients and high rates of deforestation occurring in the study area, transmission is mostly occurring outside of the largest population centers. Curbing transmission in non-domestic spaces may be limited to decreasing exposure to sandflies during the evening, nighttime, and early morning hours. Our paper serves as a cautionary tale for those relying solely on the demographic information obtained from clinic-based data to understand basic epidemiological trends of vector-borne infections.
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Affiliation(s)
- Justin T Lana
- Nicholas School of the Environment, Duke University, Durham, NC, USA.
- Duke Global Health Institute, Duke University, Durham, NC, USA.
| | - Andrés Mallipudi
- The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ernesto J Ortiz
- Duke Global Health Institute, Duke University, Durham, NC, USA
| | - Jairo H Arevalo
- Facultad de Medicina San Fernando, Universidad Nacional de San Martin Tarapoto, Tarapoto, San Martin, Perú
- Laboratorio Referencial de Salud Publica San Martin, Tarapoto, San Martin, Peru
| | - Alejandro Llanos-Cuentas
- Instituto de Medicina Tropical "Alexander von Humboldt", Universidad Peruana Cayetano Heredia, Lima, Lima, Peru
| | - William K Pan
- Nicholas School of the Environment, Duke University, Durham, NC, USA
- Duke Global Health Institute, Duke University, Durham, NC, USA
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Wang YC, Grundy-Warr C, Namsanor J, Kenney-Lazar M, Tang CJY, Goh LYW, Chong YC, Sithithaworn P, Ngonkum S, Khuntikeo N. Masculinity and misinformation: Social dynamics of liver fluke infection risk in Thailand. Parasitol Int 2021; 84:102382. [PMID: 33984515 DOI: 10.1016/j.parint.2021.102382] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 04/17/2021] [Accepted: 05/09/2021] [Indexed: 10/21/2022]
Abstract
Liver fluke infection through the consumption of raw or undercooked freshwater fish is a major public health problem in the Mekong Region. Despite the extensive efforts of liver fluke health campaigns, Northeast Thailand still reports high human infection prevalence as consumption of raw fish dishes has diminished but not ceased. This study examines the roles of social-cultural factors, particularly the influences of masculinity and misinformation, on liver fluke infection risk. Participant observation, questionnaire surveys and semi-structured interviews were conducted in four villages in Kalasin Province, Thailand, to scrutinize reasons for raw fish consumption, gender differences in raw fish culture, processes of liver fluke information dissemination, and the extent of information mismatch. Our results show that one of the key reasons (76.9%) underlying continued raw fish consumption are deeply embedded cultural practices associated with ways of rural life. About 30% of the participants indicated that they would not avoid eating raw fish, regardless of knowing the health consequences. Gender difference is evident, with 75.6% of males consuming raw fish salad (koi pla), compared to 42.7% of females. Some male participants associate raw meat consumption with virility and strength. Such beliefs underscore the cultural linkage of koi pla consumption with masculinity. Misconceptions of liver fluke life cycle and risk of infection remain, as only 15.3% of the participants correctly selected raw fish as the food source for liver fluke infection while 84.2% misunderstood that other raw foods could lead to infection. The multi-layered and hierarchical structure of public health information dissemination from medical professionals to health officers and village health volunteers to villagers has contributed to information mismatch between different layers. Our study builds on others which call for multi-pronged scientific and social strategies, as well as culturally attuned approaches to public health messaging. The study raises masculinity and misinformation as relevant considerations in disease prevention. Incorporating grounded research and gendered perspectives are part of appreciating the cultural roots of raw fish consumption. Realizing the significant role of village health volunteers in information dissemination and in supplying coherent public health messages is vital for effective health campaigns.
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Affiliation(s)
- Yi-Chen Wang
- Department of Geography, National University of Singapore, Singapore.
| | - Carl Grundy-Warr
- Department of Geography, National University of Singapore, Singapore
| | - Jutamas Namsanor
- Department of Geography, National University of Singapore, Singapore; Department of Parasitology, Khon Kaen University, Thailand
| | | | | | - Luke Yi Wei Goh
- Department of Geography, National University of Singapore, Singapore
| | - Yee Ching Chong
- Department of Geography, National University of Singapore, Singapore
| | - Paiboon Sithithaworn
- Department of Parasitology, Khon Kaen University, Thailand; Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Thailand
| | - Sutida Ngonkum
- Faculty of Humanities and Social Sciences, Khon Kaen University, Thailand
| | - Narong Khuntikeo
- Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Thailand
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Tiruneh A, Zemene E, Mekonnen Z. Strongyloidiasis: the most neglected tropical disease in Ethiopia. Infect Dis Poverty 2021; 10:65. [PMID: 33962697 PMCID: PMC8106120 DOI: 10.1186/s40249-021-00851-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/22/2021] [Indexed: 11/10/2022] Open
Abstract
Background Strongyloidiasis is the most neglected of the neglected tropical diseases (NTDs). The aim of this commentary is to describe the possible reasons why strongyloidiasis is so overlooked in Ethiopia, and shed light on better ways of control and elimination of the disease. Main body This commentary highlights three points why strongyloidiasis is the most neglected of the NTDs in Ethiopia. Firstly, lack of clear category within the NTDs resulted in omission of the disease from reports, intervention programs, and preventive chemotherapy guidelines. Secondly, magnitude of the disease is underestimated due to paucity of studies and low sensitivity of diagnostic methods coupled with asymptomatic nature of most of the infections. Finally, ivermectin (the drug of choice for treatment of strongyloidiasis) is not in use for control of the other soil-transmitted helminthiasis, nor is there ivermectin mass drug administration for control of strongyloidiasis. This might have created gap in control and elimination of the disease in Ethiopia and possibly elsewhere. Conclusion Strongyloidiasis appears to be the most neglected of the NTDs mainly due to nature of the infection, low sensitivity of the routine diagnostic tools and it’s exclusion from strategic plans and intervention programs. Moreover, studies on strongyloidiasis should use sensitive diagnostic tools. Strongyloidiasis control and elimination programs should be based on reliable evidence of epidemiology of the disease in Ethiopia. Graphic Abstract ![]()
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Affiliation(s)
- Abebaw Tiruneh
- School of Medical Laboratory Sciences, Institute of Health, Jimma University, Jimma, Ethiopia.
| | - Endalew Zemene
- School of Medical Laboratory Sciences, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Zeleke Mekonnen
- School of Medical Laboratory Sciences, Institute of Health, Jimma University, Jimma, Ethiopia
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Guirou N, Resnikoff S, Yakoura AKH, Gouda M, Bakayoko S, Napo A, Elien RR, Rocca RD, Sylla F, Traoré L. Orbital migration of schistosome eggs: a case report. BMC Ophthalmol 2021; 21:189. [PMID: 33906611 PMCID: PMC8077795 DOI: 10.1186/s12886-021-01956-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/21/2021] [Indexed: 11/10/2022] Open
Abstract
Background Ocular damage, including damage to the conjunctiva, lacrimal gland, eyelids, and orbit, caused by Schistosoma haematobium is sporadic. We report a clinical case of orbital migration of schistosome eggs. Case presentation A 14-year-old boy of Malian nationality presented with a painless swelling of the upper right eyelid, which had been gradually increasing for approximately 3 months. Visual acuity was logMAR 0.10 and 0.00 in the right and left eye, respectively. External examination revealed a right palpebral mass, pushing the globe slightly downward and inward. Computed tomography revealed a mass of the right lacrimal gland. Total excision of the mass was performed by transpalpebral orbitotomy. Pathological examination revealed an inflammatory granulomatous infiltrate of the lacrimal gland consisting of lymphocytes, eosinophils, giant cells, epithelioid cell, histiocytes and calcified Schistosoma eggs with terminal spine. Urine examination revealed eggs of S. haematobium. Praziquantel 40 mg/kg was administered to the patient. The hematuria stopped after 1 week. After 3 years of follow-up, no recurrence was noted. Conclusions The bilharzian granuloma of the lacrimal gland is an ectopic site of the parasite. In this case, the granuloma was cured by surgical excision followed by a course of Praziquantel.
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Affiliation(s)
- Nouhoum Guirou
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali.
| | - Serge Resnikoff
- Brien Holden Vision Institute, University of New South Wales, Sydney, Australia
| | | | - Michel Gouda
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
| | - Seydou Bakayoko
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
| | - Abdoulaye Napo
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
| | - Rodrigue Romulad Elien
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
| | | | - Fatoumata Sylla
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
| | - Lamine Traoré
- CHU-IOTA/ Université des sciences des techniques et des technologies de Bamako, Bamako, Mali
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Mutebi F, Krücken J, Feldmeier H, von Samsom-Himmelstjerna G. Clinical implications and treatment options of tungiasis in domestic animals. Parasitol Res 2021. [PMID: 33818640 DOI: 10.1007/s00436-021-07121-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/09/2021] [Indexed: 10/21/2022]
Abstract
Tunga penetrans, Tunga trimamillata and Tunga hexalobulata are the three species of sand fleas which cause tungiasis in domestic animals. Tunga penetrans and T. trimamillata are zoonotic in the tropical and sub-tropical endemic communities of Latin America and Africa. Tungiasis in animals frequently occurs alongside human tungiasis. Currently, most of the attention given to tungiasis is focusing on the human disease, and animal tungiasis is extremely neglected despite its public health and animal health significance. This review highlights recent findings concerning the clinical implications and treatment options but also summarises the occurrence, major features, public health and economic significance of tungiasis in domestic animals. Pigs, dogs, cats and domestic ruminants have been reported to harbour high intensities of sand fleas in endemic communities. High infection intensities cause significant animal morbidity which is often exacerbated by excoriations and secondary bacterial infections which are potentially fatal. In addition to the potential economic losses accruing from tungiasis-related morbidity, infected domestic animals contribute to transmission and persistence of sand fleas and eventually also to severe human disease. Although control of animal tungiasis is possible by adoption of proper husbandry practices, affected communities may not afford the resources required to implement them. Also, there are no widely acceptable and affordable insecticides for treatment of tungiasis in animals. Extension services aiming at increasing awareness on tungiasis and its control should be intensified. Also, available commercial insecticides should be evaluated for therapeutic and prophylactic properties against animal tungiasis.
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Rollins RL, Cowie RH, Echaluse MV, Medeiros MCI. Host snail species exhibit differential Angiostrongylus cantonensis prevalence and infection intensity across an environmental gradient. Acta Trop 2021; 216:105824. [PMID: 33422544 DOI: 10.1016/j.actatropica.2021.105824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 01/27/2023]
Abstract
Diverse snail species serve as intermediate hosts of the parasitic nematode Angiostrongylus cantonensis, the etiological agent of human neuroangiostrongyliasis. However, levels of A. cantonensis infection prevalence and intensity vary dramatically among these host species. Factors contributing to this variation are largely unknown. Environmental factors, such as precipitation and temperature, have been correlated with overall A. cantonensis infection levels in a locale, but the influence of environment on infection in individual snail species has not been addressed. We identified levels of A. cantonensis prevalence and intensity in 16 species of snails collected from 29 sites along an environmental gradient on the island of Oahu, Hawaii. The relationship between infection levels of individual species and their environment was evaluated using AIC model selection of Generalized Linear Mixed Models incorporating precipitation, temperature, and vegetation cover at each collection site. Our results indicate that different mechanisms drive parasite prevalence and intensity in the intermediate hosts. Overall, snails from rainy, cool, green sites had higher infection levels than snails from dry, hot sites with less green vegetation. Intensity increased at the same rate along the environmental gradient in all species, though at different levels, while the relation between prevalence and environmental variables depended on species. These results have implications for zoonotic transmission, as human infection is a function of infection in the intermediate hosts, ingestion of which is the main pathway of transmission. The probability of human infection is greater in locations with higher rainfall, lower temperature and more vegetation cover because of higher infection prevalence in the gastropod hosts, but this depends on the host species. Moreover, severity of neuroangiostrongyliasis symptoms is likely to be greater in locations with higher rainfall, lower temperature, and more vegetation because of the higher numbers of infectious larvae (infection intensity) in all infected snail species. This study highlights the variation of infection prevalence and intensity in individual gastropod species, the individualistic nature of interactions between host species and their environment, and the implications for human neuroangiostrongyliasis in different environments.
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Affiliation(s)
- Randi L Rollins
- School of Life Sciences, University of Hawaii, 2538 McCarthy Mall, Edmondson 216, Honolulu, Hawaii 96822, USA; Pacific Biosciences Research Center, University of Hawaii, 3050 Maile Way, Gilmore 408, Honolulu, Hawaii 96822, USA.
| | - Robert H Cowie
- Pacific Biosciences Research Center, University of Hawaii, 3050 Maile Way, Gilmore 408, Honolulu, Hawaii 96822, USA
| | - Ma Vida Echaluse
- Pacific Biosciences Research Center, University of Hawaii, 1993 East West Road, Honolulu, Hawaii 96822, USA
| | - Matthew C I Medeiros
- Pacific Biosciences Research Center, University of Hawaii, 1993 East West Road, Honolulu, Hawaii 96822, USA
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Middleton K, Bowen AC. Addressing normalization using culturally relevant approaches: An important adjunct to reducing the burden of impetigo and scabies. Lancet Reg Health West Pac 2021; 7:100102. [PMID: 34327421 PMCID: PMC8315659 DOI: 10.1016/j.lanwpc.2021.100102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 01/20/2021] [Indexed: 11/23/2022]
Affiliation(s)
- Katherine Middleton
- Division of Paediatrics, School of Medicine, University of Western Australia, Perth, Western Australia, Australia
| | - Asha C Bowen
- Division of Paediatrics, School of Medicine, University of Western Australia, Perth, Western Australia, Australia
- Department of Infectious Diseases, Perth Children's Hospital, Child and Adolescent Health Service, Perth, Western Australia, Australia
- Wesfarmers Centre for Vaccines and Infectious Diseases, Telethon Kids Institute, Perth, Western Australia, Australia
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Institute for Health Research, The University of Notre Dame Australia, Perth, Western Australia, Australia
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Chen H, Mozzicafreddo M, Pierella E, Carletti V, Piersanti A, Ali SM, Ame SM, Wang C, Miceli C. Dissection of the gut microbiota in mothers and children with chronic Trichuris trichiura infection in Pemba Island, Tanzania. Parasit Vectors 2021; 14:62. [PMID: 33468220 PMCID: PMC7814639 DOI: 10.1186/s13071-021-04580-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 01/05/2021] [Indexed: 12/21/2022] Open
Abstract
Background Soil-transmitted helminthiases are important neglected tropical diseases that result in a notably high number of disability-adjusted life years worldwide. Characterizing the interactions between the human intestinal microbiome and helminths is of interest in the development of alternative treatments that do not rely on chemotherapeutics and do not lead to drug resistance. Methods We recruited and obtained fecal samples from 32 pairs of mothers and children on Pemba Island and monitored their intestinal microbiota using 16S rRNA gene sequencing. Results We observed that microbial changes occur in the gut microbiota of infected mothers and children. Some short-chain fatty acid (SCFA)-producing bacteria and carbohydrate-degrading bacteria exhibited lower abundance in the infected individuals. Potentially pathogenic Campylobacter and proinflammatory Methanobrevibacter in infected mothers and opportunistic Enterococcus in infected children exhibited greater abundance. Conclusions Our findings could reveal the microbiota profiling in T. trichiura-infected individuals, indicate the potential roles of key microbiota in the host and aid to the development of novel strategies to control T. trichiura infection. Graphic abstract ![]()
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Affiliation(s)
- Hongliang Chen
- College of Veterinary Medicine, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China.,School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Matteo Mozzicafreddo
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Elisa Pierella
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Vanessa Carletti
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Angela Piersanti
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Said M Ali
- Public Health Laboratory Ivo de Carneri, Pemba Island, Chake Chake, Tanzania
| | - Shaali M Ame
- Public Health Laboratory Ivo de Carneri, Pemba Island, Chake Chake, Tanzania
| | - Chunfeng Wang
- College of Veterinary Medicine, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China.
| | - Cristina Miceli
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy.
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