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Ji C, Zhang Y, Feng Y, Zhang X, Gong F, Yao H, Sun X, Pan Z. Circular replication-associated protein-encoding single-stranded DNA virus with risk of spillover is widely prevalent in domestic animals in China. Virus Res 2024; 339:199204. [PMID: 37607596 PMCID: PMC10654594 DOI: 10.1016/j.virusres.2023.199204] [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: 06/05/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 08/24/2023]
Abstract
Circular replication-associated protein (Rep)-encoding single-stranded (CRESS) DNA viruses are highly diverse and have a broad range of hosts. In this study, we report the detection of Bo-Circo-like virus AH20-1 in the feces of diarrheal cattle. The virus has a circular genome of 3,912 nucleotides, three major putative open reading frames, and encodes a Rep gene of 310 amino acids. We found that the virus is closely related to the Bo-Circo-like virus CH strain, which belongs to the novel Kirkoviridae family. Furthermore, we conducted a nationwide surveillance program and found that the virus is prevalent in China (23.6%, 205/868), with the BCLa subtype being the predominant strain. Our findings suggest that the virus can infect sheep, highlighting the potential for cross-species transmission. Our pressure analysis indicates that the CRESS-DNA Kirkoviridae family has broad host adaptation, and that selection pressure played an important role in the evolution of its Rep genes. Our study underscores the need for continued epidemiological surveillance of this virus due to its widespread prevalence in our ruminant population and potential for cross-species transmission.
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Affiliation(s)
- Chengyuan Ji
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yiqiu Feng
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xinqin Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Fengju Gong
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Huochun Yao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Xueqiang Sun
- China Animal Health and Epidemiology Center, Key Laboratory of Animal Biosafety Risk Prevention and Control (South), Qingdao 266000, China.
| | - Zihao Pan
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China..
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Samie A, Maluleke RP, Tanih N, ElBakri A. Molecular epidemiology of Microsporidia among HIV-positive and HIV-negative patients in the Limpopo province, South Africa. J Infect Dev Ctries 2021; 15:710-718. [PMID: 34106896 DOI: 10.3855/jidc.12988] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 08/10/2020] [Indexed: 10/31/2022] Open
Abstract
INTRODUCTION Human microsporidiosis represents an important and rapidly emerging opportunistic disease. The present study investigated the prevalence of microsporidia among HIV positive and HIV negative patients with or without diarrhoea in Vhembe and Mopani Districts in the Limpopo Province. METHODOLOGY A total of 170 stool samples were collected from these patients and microsporidia species was detected using a Real-Time PCR targeting a conserved region of the small ribosomal subunit rRNA (SSU-rRNA) gene of Enterocytozoon bieneusi, Encephalitozoon intestinalis, Encephalitozoon hellem, and Encephalitozoon cuniculi. RESULTS Fifty six (32.9%) were positive for microsporidia. The prevalence was higher in HIV negative patients (36.6%) while 24.1% of patients who were HIV positive had microsporidia. Microsporidia was more common among patients aged between 1 and 10 years (52.6%). However among the HIV positive patients, microsporidia prevalence was higher among those that were not taking antiretrovirals (ARVs) compared to those who were on ARVs, (36.6%) and (24.1%), respectively. Microsporidia was also noted to be significantly associated with diarrheal and stomach pains; p = 0.02 and p = 0.048, respectively. Furthermore, microsporidia infections was more prevalent among patients who had animals at home (p = 0.037). CONCLUSIONS Study has shown a high prevalence of microsporidia among patients attending primary health centers in the Mopani District for the first time. Prevalence of microsporidia was higher among HIV negative and HIV positive patients who were not on ARV treatment. Keeping animals in the household appeared to be a risk of getting infected with microsporidia. Further studies are needed to determine the genetic characteristics of these organisms in the study population.
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Affiliation(s)
- Amidou Samie
- Molecular Parasitology and opportunistic infections program, Department of Microbiology, University of Venda, Thohoyandou, Limpopo, South Africa
| | - Rhulani Patricia Maluleke
- Molecular Parasitology and opportunistic infections program, Department of Microbiology, University of Venda, Thohoyandou, Limpopo, South Africa
| | | | - Ali ElBakri
- Department of Medical Laboratory Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates.
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Pessoa RF, Duarte Figueiredo IA, Dantas Ferreira SR, Lima de Farias Cavalcanti Silva AR, Marinho Paiva RL, Cordeiro LV, de Oliveira Lima E, Cabrera SP, Sarmento Silva TM, de Andrade Cavalcante F. Investigation of ethnomedicinal use of Commiphora leptophloeos (Mart.) J. B. Gillett (Burseraceae) in treatment of diarrhea. J Ethnopharmacol 2021; 268:113564. [PMID: 33166628 DOI: 10.1016/j.jep.2020.113564] [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] [Received: 05/13/2020] [Revised: 10/07/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Commiphora leptophloeos (Mart.) J.B. Gillett, popularly known as "imburana", "imburana-de-cheiro" or "imburana-de-espinho", has been used in folk medicine for the treatment of gastrointestinal diseases, such as diarrhea. The indian tribes "Kairir-Shokó and shokó use the bark to treat diarrhea. However, there is no scientific evidence to justify the therapeutic use of this species. AIM OF THE STUDY To investigate the ethnomedicinal use of Commiphora leptophloeos, with respect to the antimicrobial, antisecretory, antimotility and antispasmodic activities of the crude ethanolic extract obtained from its leaves (CL-EtOHL) and the mechanism underlying this action in rodents. MATERIAL AND METHODS In the evaluation of antibacterial and antifungal activities was determined the minimum inhibitory concentration (MIC) of the extract, against different strains of bacteria and fungi. All experimental protocols were approved by the Animal Ethics Committee of the Federal University of Paraíba (045/2016). In addition, behavioral screening and acute toxicity assessment of CL-EtOHL were performed in female mice (n = 6). In the investigation of antidiarrheal activity (n = 6), frequency of defecation and number of liquid stools, were classified during 4 h, and intestinal fluid and transit were measured. In addition, the antispasmodic effect on rat ileum (n = 5) was also investigated. RESULTS The ethanolic extract is rich in flavonoids and the main were identified as C-glycosylated flavonoids (isoorientin, orientin, and vitexin). In the evaluation of antimicrobial and antifungal activity, the extract showed moderate efficacy only against the tested strains of Candida krusei ATCC-6258, Candida parapsilosis ATCC-22019 and Candida glabrata ATCC-90030. The extract had no toxic effect until 2000 mg/kg. In castor oil-induced diarrhea, CL-EtOHL inhibited, in a dose-dependent manner, both total defecation frequency (ED50 = 380.4 ± 145.4 mg/kg) and the number of watery stools (ED50 = 151.2 ± 76.3 mg/kg). The extract showed no effect on fluid accumulation or normal intestinal transit. On the other hand, when the animals were pretreated with castor oil, the extract decreased the distance traveled by the activated charcoal (ED50 = 177.0 ± 50.3 mg/kg). In the investigation of antispasmodic effect, CL-EtOHL antagonized the contractions induced by KCl 30 mM (IC50 = 208.2 ± 25.9 μg/mL) and CCh 10-6 M (IC50 = 95. ± 22.0 μg/mL). To verify the participation of muscarinic receptors in this effect, cumulative carbachol curves were performed in the absence and presence of the extract, and a non-competitive pseudo-irreversible antagonism of these receptors was observed. CONCLUSION The data indicate that ethanol extract obtained from the leaves of Commiphora leptophloeos has an antidiarrheal effect due to inhibition of the intestinal motility and antispasmodic effect, through the antagonism of muscarinic receptors. In addition, we suggest that flavonoids isolated from CL-EtOHL may be responsible for antidiarrheal activity of this extract. This explains its ethnomedicinal use in the treatment of diarrhea.
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Affiliation(s)
- Rayane Fernandes Pessoa
- Programa de Pós-graduação Em Produtos Naturais e Sintéticos Bioativos/Universidade Federal da Paraíba, Brazil
| | | | | | | | | | - Laísa Vilar Cordeiro
- Programa de Pós-graduação Em Produtos Naturais e Sintéticos Bioativos/Universidade Federal da Paraíba, Brazil
| | - Edeltrudes de Oliveira Lima
- Programa de Pós-graduação Em Produtos Naturais e Sintéticos Bioativos/Universidade Federal da Paraíba, Brazil; Departamento de Ciências Farmacêuticas/Universidade Federal da Paraíba, Brazil
| | | | | | - Fabiana de Andrade Cavalcante
- Programa de Pós-graduação Em Produtos Naturais e Sintéticos Bioativos/Universidade Federal da Paraíba, Brazil; Departamento de Fisiologia e Patologia/Universidade Federal da Paraíba, Brazil.
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Adedokun ST, Yaya S. Factors influencing mothers' health care seeking behaviour for their children: evidence from 31 countries in sub-Saharan Africa. BMC Health Serv Res 2020; 20:842. [PMID: 32894107 PMCID: PMC7487813 DOI: 10.1186/s12913-020-05683-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 05/13/2020] [Accepted: 08/23/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Almost half of the estimated 5.3 million deaths of under-five children in 2018 occurred in sub-Saharan Africa with morbidity contributing substantially to these deaths. Seeking medical care for children has been described as an important measure of reducing mortality occasioned by morbidity. This study examined factors influencing mothers' health seeking behaviour for their children in sub-Saharan Africa. METHODS This study made use of data from Demographic and Health Surveys (DHS) of 31 countries in sub-Saharan Africa. The study involved 75,982 children who received or did not receive measles vaccine and 93,142 children who sought or did not seek medical care when affected by fever or cough and diarrhoea. Binary logistic regression was applied in the analysis. RESULTS Most of the children (74%) received measles vaccine while less than one-fifth sought medical care for fever or cough (16%) and diarrhoea (10%). Majority of the children of women who received measles vaccine and sought medical care when they had fever or cough are from richest households. Children of women with primary and secondary or higher education, children of working women and children of women that attended antenatal care during pregnancy are more likely to seek medical care for fever or cough. While children of women who live in urban areas and children of second or higher order of birth are less likely to receive measles vaccine, children aged 24-35 months and those who were of average size at birth are less likely to seek medical care for diarrhoea. CONCLUSIONS This study has revealed that mothers' health care seeking behaviour for their children is influenced by social, maternal and child factors. Any intervention aimed at improving child health in sub-Sharan Africa should take these factors into consideration.
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Affiliation(s)
- Sulaimon T Adedokun
- Department of Demography and Social Statistics, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Sanni Yaya
- School of International Development and Global Studies, Faculty of Social Sciences, University of Ottawa, 120 University Private, Ottawa, ON, K1N 6N5, Canada. .,The George Institute for Global Health, The University of Oxford, Oxford, UK.
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Berhe B, Bugssa G, Bayisa S, Alemu M. Foodborne intestinal protozoan infection and associated factors among patients with watery diarrhea in Northern Ethiopia; a cross-sectional study. J Health Popul Nutr 2018; 37:5. [PMID: 29499754 PMCID: PMC5834838 DOI: 10.1186/s41043-018-0137-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/24/2018] [Indexed: 05/14/2023]
Abstract
BACKGROUND Intestinal protozoa are parasites transmitted by consumption of contaminated water and food and mainly affect children and elder people and cause considerable health problems. They are the leading causes of outpatient morbidity due to diarrhea in the developing countries. So, assessing water and food source of diarrheal patients and identifying the main associated factors for transmission of protozoan parasitic infections help for effective control measures of protozoan infections. Hence, the current study was aimed at determining the prevalence of foodborne intestinal protozoa infections and associated factors among diarrheic patients in North Ethiopia. METHODS A health facility based cross-sectional study was conducted among 223 patients with watery diarrhea in four selected government health facilities in North Ethiopia from November 2016-June 2017. A structured questionnaire was used to collect data on socio-demography of study participants and factors associated with foodborne protozoa infections. The diarrheic stool samples were collected, transported, and processed using direct wet mount, formal-ether concentration and modified ZiehlNeelson staining methods. The data were analyzed using SPSS version 21 and descriptive statistics, bi-variate, and multivariate logistic regressions were computed. P-value < 0.05 at 95% confidence interval was considered statistically significant. RESULTS The overall prevalence of foodborne protozoa infection was 101 (45.3%). The predominant protozoa species identified was Entamoeba histolytica/dispar 55 (24.7%), followed by Giardia intestinalis 25 (11.2%) and Cryptosporidium species 5 (2.2%). The highest proportion of protozoa infection was observed among males (23.3%) and the age group 15-24 years (13.5%). Statistically significant associations were observed between foodborne protozoan infection and not using any type of recipe to decontaminate salads and fruits (AOR = 2.64, 95 CI: 1.34-5.19, P = 0.005) and using vinegar as a decontaminant (AOR = 2.83, 95 CI: 1.24-6.48, P = 0.014). Eating out (meals at a restaurant) on the other hand was found to be protective for foodborne protozoan infection (AOR = 0.43, 95 CI: 0.23-0.78, P = 0.006). CONCLUSION Our study revealed that foodborne protozoa infections are of public health significance in the study area. Vinegar, which is frequently used as a recipe for decontaminating salads and fruits, is inversely related to foodborne protozoa parasite infection .
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Affiliation(s)
- Birhane Berhe
- Department of Bio-Medical Laboratory Science, College of Health Science, Adigrat University, Adigrat, Ethiopia
| | - Gessessew Bugssa
- Department of Medical Parasitology and Entomology, Institute of Biomedical Sciences, College of Health Science, Mekelle University, Mekelle, Ethiopia
| | - Sena Bayisa
- Department of Medical Parasitology and Entomology, Institute of Biomedical Sciences, College of Health Science, Mekelle University, Mekelle, Ethiopia
| | - Megbaru Alemu
- Department of Medical Microbiology, Immunology and Parasitology, Bahir Dar University, Mekelle, Ethiopia
- Department of Microbiology, Immunology and Parasitology, Bahir Dar University, PO Box 79, Bahir Dar, Ethiopia
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Seimetz E, Slekiene J, Friedrich MND, Mosler HJ. Identifying behavioural determinants for interventions to increase handwashing practices among primary school children in rural Burundi and urban Zimbabwe. BMC Res Notes 2017; 10:280. [PMID: 28705260 PMCID: PMC5513052 DOI: 10.1186/s13104-017-2599-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 07/25/2016] [Accepted: 07/07/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This article presents the development of a school handwashing programme in two different sub-Saharan countries that applies the RANAS (risk, attitudes, norms, ability, and self-regulation) systematic approach to behaviour change. METHODS Interviews were conducted with 669 children enrolled in 20 primary schools in Burundi and 524 children in 20 primary schools in Zimbabwe. Regression analyses were used to assess the influence of the RANAS behavioural determinants on reported handwashing frequencies. RESULTS The results revealed that, in both countries, a programme targeting social norms and self-efficacy would be most effective. In Burundi, raising the children's perceived severity of the consequences of contracting diarrhoea, and in Zimbabwe, increasing the children's health knowledge should be part of the programme. CONCLUSIONS The school handwashing programme should create awareness of the benefits of handwashing through educational activities, raise the children's ability and confidence in washing hands at school through infrastructural improvements, and highlight the normality of washing hands at school through events and poster creation.
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Affiliation(s)
- Elisabeth Seimetz
- Department of Environmental Social Sciences, Eawag: Swiss Federal Institute of Aquatic Science & Technology, Ueberlandstrasse 133, P.O. Box 61, 8600, Duebendorf, Switzerland
| | - Jurgita Slekiene
- Department of Environmental Social Sciences, Eawag: Swiss Federal Institute of Aquatic Science & Technology, Ueberlandstrasse 133, P.O. Box 61, 8600, Duebendorf, Switzerland
| | - Max N D Friedrich
- Department of Environmental Social Sciences, Eawag: Swiss Federal Institute of Aquatic Science & Technology, Ueberlandstrasse 133, P.O. Box 61, 8600, Duebendorf, Switzerland
| | - Hans-Joachim Mosler
- Department of Environmental Social Sciences, Eawag: Swiss Federal Institute of Aquatic Science & Technology, Ueberlandstrasse 133, P.O. Box 61, 8600, Duebendorf, Switzerland.
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da Silva ADS, de Melo E Silva K, Neto JC, Costa VCDO, Pessôa HDLF, Tavares JF, da Silva MS, Cavalcante FDA. Croton grewioides Baill. (Euphorbiaceae) Shows Anti diarrheal Activity in Mice. Pharmacognosy Res 2016; 8:202-5. [PMID: 27365990 PMCID: PMC4908850 DOI: 10.4103/0974-8490.181465] [Citation(s) in RCA: 2] [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] [Indexed: 01/13/2023] Open
Abstract
Based on chemotaxonomy, we decided to investigate the possible antidiarrheal activity in mice of a crude ethanolic extract obtained from aerial parts of Croton grewioides (CG-EtOH). We tested for any possible toxicity in rat erythrocytes and acute toxicity in mice. Antidiarrheal activity was assessed by determining the effect of CG-EtOH on defecation frequency, liquid stool, intestinal motility and intestinal fluid accumulation. CG-EtOH showed no in vitro cytotoxicity and was not orally lethal. In contrast, the extract given intraperitoneally (at 2000 mg/kg) was lethal, but only in females. CG-EtOH produced a significant and equipotent antidiarrheal activity, both in defecation frequency (ED50 = 106.0 ± 8.1 mg/kg) and liquid stools (ED50 = 105.0 ± 9.2 mg/kg). However, CG-EtOH (125 mg/kg) decreased intestinal motility by only 22.7% ± 4.4%. Moreover, extract markedly inhibited the castor oil-induced intestinal contents (ED50 = 34.6 ± 5.4 mg/kg). We thus conclude that CG-EtOH is not orally lethal and contains active principles with antidiarrheal activity, and this effect seems to involve mostly changes in intestinal secretion.
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Affiliation(s)
- Anne Dayse Soares da Silva
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Karoline de Melo E Silva
- Institute of Biological Sciences and Health, Federal University of Alagoas, Maceió 57020-720, AL, Brazil
| | - José Clementino Neto
- Institute of Biological Sciences and Health, Federal University of Alagoas, Maceió 57020-720, AL, Brazil
| | | | - Hilzeth de Luna F Pessôa
- Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Josean Fechine Tavares
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Marcelo Sobral da Silva
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Fabiana de Andrade Cavalcante
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Physiology and Pathology, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
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