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Dera KSM, Dieng MM, Moyaba P, Ouedraogo GMS, Pagabeleguem S, Njokou F, Ngambia Freitas FS, de Beer CJ, Mach RL, Vreysen MJB, Abd-Alla AMM. Prevalence of Spiroplasma and interaction with wild Glossina tachinoides microbiota. Parasite 2023; 30:62. [PMID: 38117272 PMCID: PMC10732139 DOI: 10.1051/parasite/2023064] [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: 09/04/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023] Open
Abstract
Tsetse flies (Diptera: Glossinidae) are vectors of the tropical neglected diseases sleeping sickness in humans and nagana in animals. The elimination of these diseases is linked to control of the vector. The sterile insect technique (SIT) is an environment-friendly method that has been shown to be effective when applied in an area-wide integrated pest management approach. However, as irradiated males conserve their vectorial competence, there is the potential risk of trypanosome transmission with their release in the field. Analyzing the interaction between the tsetse fly and its microbiota, and between different microbiota and the trypanosome, might provide important information to enhance the fly's resistance to trypanosome infection. This study on the prevalence of Spiroplasma in wild populations of seven tsetse species from East, West, Central and Southern Africa showed that Spiroplasma is present only in Glossina fuscipes fuscipes and Glossina tachinoides. In G. tachinoides, a significant deviation from independence in co-infection with Spiroplasma and Trypanosoma spp. was observed. Moreover, Spiroplasma infections seem to significantly reduce the density of the trypanosomes, suggesting that Spiroplasma might enhance tsetse fly's refractoriness to the trypanosome infections. This finding might be useful to reduce risks associated with the release of sterile males during SIT implementation in trypanosome endemic areas.
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Affiliation(s)
- Kiswend-Sida M Dera
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
- Insectarium de Bobo Dioulasso – Campagne d’Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT) 01 BP 1087 Bobo Dioulasso 01 Burkina Faso
| | - Mouhamadou M Dieng
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
- Université Gaston Berger Saint Louis Senegal
| | - Percy Moyaba
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
- Epidemiology, Parasites and Vectors, Agricultural Research Council-Onderstepoort Veterinary Research (ARC-OVR) Pretoria South Africa
| | - Gisele MS Ouedraogo
- Insectarium de Bobo Dioulasso – Campagne d’Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT) 01 BP 1087 Bobo Dioulasso 01 Burkina Faso
| | - Soumaïla Pagabeleguem
- Insectarium de Bobo Dioulasso – Campagne d’Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT) 01 BP 1087 Bobo Dioulasso 01 Burkina Faso
- University of Dedougou B.P. 176 Dédougou 01 Burkina Faso
| | - Flobert Njokou
- Laboratory of Parasitology and Ecology, Faculty of Sciences, University of Yaounde I Po. Box 812 Yaoundé Cameroon
| | | | - Chantel J de Beer
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
| | - Robert L Mach
- Institute of Chemical, Environmental, and Bioscience Engineering, Research Area Biochemical Technology, Vienna University of Technology, Gumpendorfer Straße 1a 1060 Vienna Austria
| | - Marc JB Vreysen
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
| | - Adly MM Abd-Alla
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture 1400 Vienna Austria
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2
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Gjorgjieva T, Chaloemtoem A, Shahin T, Bayaraa O, Dieng MM, Alshaikh M, Abdalbaqi M, Del Monte J, Begum G, Leonor C, Manikandan V, Drou N, Arshad M, Arnoux M, Kumar N, Jabari A, Abdulle A, ElGhazali G, Ali R, Shaheen SY, Abdalla J, Piano F, Gunsalus KC, Daggag H, Al Nahdi H, Abuzeid H, Idaghdour Y. Systems genetics identifies miRNA-mediated regulation of host response in COVID-19. Hum Genomics 2023; 17:49. [PMID: 37303042 DOI: 10.1186/s40246-023-00494-4] [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: 03/23/2023] [Accepted: 05/10/2023] [Indexed: 06/13/2023] Open
Abstract
BACKGROUND Individuals infected with SARS-CoV-2 vary greatly in their disease severity, ranging from asymptomatic infection to severe disease. The regulation of gene expression is an important mechanism in the host immune response and can modulate the outcome of the disease. miRNAs play important roles in post-transcriptional regulation with consequences on downstream molecular and cellular host immune response processes. The nature and magnitude of miRNA perturbations associated with blood phenotypes and intensive care unit (ICU) admission in COVID-19 are poorly understood. RESULTS We combined multi-omics profiling-genotyping, miRNA and RNA expression, measured at the time of hospital admission soon after the onset of COVID-19 symptoms-with phenotypes from electronic health records to understand how miRNA expression contributes to variation in disease severity in a diverse cohort of 259 unvaccinated patients in Abu Dhabi, United Arab Emirates. We analyzed 62 clinical variables and expression levels of 632 miRNAs measured at admission and identified 97 miRNAs associated with 8 blood phenotypes significantly associated with later ICU admission. Integrative miRNA-mRNA cross-correlation analysis identified multiple miRNA-mRNA-blood endophenotype associations and revealed the effect of miR-143-3p on neutrophil count mediated by the expression of its target gene BCL2. We report 168 significant cis-miRNA expression quantitative trait loci, 57 of which implicate miRNAs associated with either ICU admission or a blood endophenotype. CONCLUSIONS This systems genetics study has given rise to a genomic picture of the architecture of whole blood miRNAs in unvaccinated COVID-19 patients and pinpoints post-transcriptional regulation as a potential mechanism that impacts blood traits underlying COVID-19 severity. The results also highlight the impact of host genetic regulatory control of miRNA expression in early stages of COVID-19 disease.
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Affiliation(s)
- T Gjorgjieva
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
| | - A Chaloemtoem
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - T Shahin
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - O Bayaraa
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M M Dieng
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Alshaikh
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Abdalbaqi
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - J Del Monte
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - G Begum
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - C Leonor
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - V Manikandan
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - N Drou
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Arshad
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Arnoux
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - N Kumar
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - A Jabari
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - A Abdulle
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - G ElGhazali
- Sheikh Khalifa Medical City-Union 71 PureHealth, Abu Dhabi, United Arab Emirates
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - R Ali
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - S Y Shaheen
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - J Abdalla
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - F Piano
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - K C Gunsalus
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - H Daggag
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - H Al Nahdi
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - H Abuzeid
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - Y Idaghdour
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates.
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Dieng MM, Augustinos AA, Demirbas-Uzel G, Doudoumis V, Parker AG, Tsiamis G, Mach RL, Bourtzis K, Abd-Alla AMM. Interactions between Glossina pallidipes salivary gland hypertrophy virus and tsetse endosymbionts in wild tsetse populations. Parasit Vectors 2022; 15:447. [PMID: 36447246 PMCID: PMC9707009 DOI: 10.1186/s13071-022-05536-9] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/07/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Tsetse control is considered an effective and sustainable tactic for the control of cyclically transmitted trypanosomosis in the absence of effective vaccines and inexpensive, effective drugs. The sterile insect technique (SIT) is currently used to eliminate tsetse fly populations in an area-wide integrated pest management (AW-IPM) context in Senegal. For SIT, tsetse mass rearing is a major milestone that associated microbes can influence. Tsetse flies can be infected with microorganisms, including the primary and obligate Wigglesworthia glossinidia, the commensal Sodalis glossinidius, and Wolbachia pipientis. In addition, tsetse populations often carry a pathogenic DNA virus, the Glossina pallidipes salivary gland hypertrophy virus (GpSGHV) that hinders tsetse fertility and fecundity. Interactions between symbionts and pathogens might affect the performance of the insect host. METHODS In the present study, we assessed associations of GpSGHV and tsetse endosymbionts under field conditions to decipher the possible bidirectional interactions in different Glossina species. We determined the co-infection pattern of GpSGHV and Wolbachia in natural tsetse populations. We further analyzed the interaction of both Wolbachia and GpSGHV infections with Sodalis and Wigglesworthia density using qPCR. RESULTS The results indicated that the co-infection of GpSGHV and Wolbachia was most prevalent in Glossina austeni and Glossina morsitans morsitans, with an explicit significant negative correlation between GpSGHV and Wigglesworthia density. GpSGHV infection levels > 103.31 seem to be absent when Wolbachia infection is present at high density (> 107.36), suggesting a potential protective role of Wolbachia against GpSGHV. CONCLUSION The result indicates that Wolbachia infection might interact (with an undefined mechanism) antagonistically with SGHV infection protecting tsetse fly against GpSGHV, and the interactions between the tsetse host and its associated microbes are dynamic and likely species specific; significant differences may exist between laboratory and field conditions.
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Affiliation(s)
- Mouhamadou M. Dieng
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria
| | - Antonios A. Augustinos
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria ,Present Address: Department of Plant Protection, Institute of Industrial and Forage Crops, Hellenic Agricultural Organization-Demeter, 26442 Patras, Greece
| | - Güler Demirbas-Uzel
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria
| | - Vangelis Doudoumis
- grid.11047.330000 0004 0576 5395Laboratory of Systems Microbiology and Applied Genomics, Department of Environmental Engineering, University of Patras, 2 Seferi Str., 30100 Agrinio, Greece
| | - Andrew G. Parker
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria ,Present Address: Roppersbergweg 15, 2381 Laab im Walde, Austria
| | - George Tsiamis
- grid.11047.330000 0004 0576 5395Laboratory of Systems Microbiology and Applied Genomics, Department of Environmental Engineering, University of Patras, 2 Seferi Str., 30100 Agrinio, Greece
| | - Robert L. Mach
- grid.5329.d0000 0001 2348 4034Institute of Chemical, Environmental, and Biological Engineering, Research Area Biochemical Technology, Vienna University of Technology, Gumpendorfer Straße 1a, 1060 Vienna, Austria
| | - Kostas Bourtzis
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria
| | - Adly M. M. Abd-Alla
- grid.420221.70000 0004 0403 8399Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Wagrammer Straße 5, 100, 1400 Vienna, Austria
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4
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Dieng MM, Augustinos AA, Demirbas-uzel G, Doudoumis V, Parker AG, Tsiamis G, Mach RL, Bourtzis K, Abd-alla AMM. Interactions between Glossina pallidipes Salivary Gland Hypertrophy Virus and tsetse endosymbionts in wild tsetse populations.. [DOI: 10.21203/rs.3.rs-1139411/v2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
Background
Tsetse control is considered an effective and sustainable tactic for the control of cyclically transmitted trypanosomosis in the absence of effective vaccines and inexpensive, effective drugs. The sterile insect technique (SIT) is currently used to eliminate tsetse fly populations in an area-wide integrated pest management (AW-IPM) context in Senegal. For SIT, tsetse mass-rearing is a major milestone that associated microbes can influence. Tsetse flies can be infected with micro-organisms, including the primary and obligate Wigglesworthia glossinidia, the commensal Sodalis glossinidius, and Wolbachia pipientis. In addition, tsetse populations often carry a pathogenic DNA virus, the Glossina pallidipes Salivary Gland Hypertrophy Virus (GpSGHV) that hinders tsetse fertility and fecundity. Interactions between symbionts and pathogens might affect the performance of the insect host.
Methods
In the present study, we assessed associations of GpSGHV and tsetse endosymbionts under field conditions to decipher the possible bidirectional interactions in different Glossina species. We determined the co-infection pattern of GpSGHV and Wolbachia in natural tsetse populations. We further analyzed the interaction of both Wolbachia and GpSGHV infection with Sodalis and Wigglesworthia density using qPCR.
Results
The results indicated that the co-infection of GpSGHV and Wolbachia was most prevalent in Glossina austeni and Glossina morsitans morsitans, with an explicit significant negative correlation between GpSGHV and Wigglesworthia density. GpSGHV infection levels of more than 103.31 seems to be absent when Wolbachia infection was present at high density (> 107.36, suggesting a potential protective role of Wolbachia against GpSGHV.
Conclusion
The result indicates that Wolbachia infection might interact (with an undefined mechanism) antagonistically with SGHV infection protecting tsetse fly against GpSGHV, and the interactions between the tsetse host and its associated microbes are dynamic, likely species-specific and significant differences may exist between laboratory and field conditions.
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Affiliation(s)
| | | | | | | | - Andrew G. Parker
- Joint FAO/IAEA Centre of Nuclear Techniques in Food & Agriculture
| | | | | | - Kostas Bourtzis
- Joint FAO/IAEA Centre of Nuclear Techniques in Food & Agriculture
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5
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Dieng MM, Dera KSM, Moyaba P, Ouedraogo GMS, Demirbas-Uzel G, Gstöttenmayer F, Mulandane FC, Neves L, Mdluli S, Rayaisse JB, Belem AMG, Pagabeleguem S, de Beer CJ, Parker AG, Van Den Abbeele J, Mach RL, Vreysen MJB, Abd-Alla AMM. Prevalence of Trypanosoma and Sodalis in wild populations of tsetse flies and their impact on sterile insect technique programmes for tsetse eradication. Sci Rep 2022; 12:3322. [PMID: 35228552 PMCID: PMC8885713 DOI: 10.1038/s41598-022-06699-2] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 02/03/2022] [Indexed: 11/24/2022] Open
Abstract
The sterile insect technique (SIT) is an environment friendly and sustainable method to manage insect pests of economic importance through successive releases of sterile irradiated males of the targeted species to a defined area. A mating of a sterile male with a virgin wild female will result in no offspring, and ultimately lead to the suppression or eradication of the targeted population. Tsetse flies, vectors of African Trypanosoma, have a highly regulated and defined microbial fauna composed of three bacterial symbionts that may have a role to play in the establishment of Trypanosoma infections in the flies and hence, may influence the vectorial competence of the released sterile males. Sodalis bacteria seem to interact with Trypanosoma infection in tsetse flies. Field-caught tsetse flies of ten different taxa and from 15 countries were screened using PCR to detect the presence of Sodalis and Trypanosoma species and analyse their interaction. The results indicate that the prevalence of Sodalis and Trypanosoma varied with country and tsetse species. Trypanosome prevalence was higher in east, central and southern African countries than in west African countries. Tsetse fly infection rates with Trypanosoma vivax and T. brucei sspp were higher in west African countries, whereas tsetse infection with T. congolense and T. simiae, T. simiae (tsavo) and T. godfreyi were higher in east, central and south African countries. Sodalis prevalence was high in Glossina morsitans morsitans and G. pallidipes but absent in G. tachinoides. Double and triple infections with Trypanosoma taxa and coinfection of Sodalis and Trypanosoma were rarely observed but it occurs in some taxa and locations. A significant Chi square value (< 0.05) seems to suggest that Sodalis and Trypanosoma infection correlate in G. palpalis gambiensis, G. pallidipes and G. medicorum. Trypanosoma infection seemed significantly associated with an increased density of Sodalis in wild G. m. morsitans and G. pallidipes flies, however, there was no significant impact of Sodalis infection on trypanosome density.
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Affiliation(s)
- Mouhamadou M Dieng
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria
| | - Kiswend-Sida M Dera
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria.,Insectarium de Bobo Dioulasso-Campagne d'Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT), 01 BP 1087, Bobo Dioulasso 01, Burkina Faso
| | - Percy Moyaba
- Epidemiology, Vectors and Parasites, Agricultural Research Council-Onderstepoort Veterinary Research, Pretoria, South Africa
| | - Gisele M S Ouedraogo
- Insectarium de Bobo Dioulasso-Campagne d'Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT), 01 BP 1087, Bobo Dioulasso 01, Burkina Faso
| | - Guler Demirbas-Uzel
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria
| | - Fabian Gstöttenmayer
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria
| | - Fernando C Mulandane
- University Eduardo Mondlane, Centro de Biotecnologia, Av. de Moçambique Km 1.5, Maputo, Mozambique
| | - Luis Neves
- University Eduardo Mondlane, Centro de Biotecnologia, Av. de Moçambique Km 1.5, Maputo, Mozambique.,Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Sihle Mdluli
- Epidemiology Unit, Department of Veterinary Services, PO Box 4192, Manzini, Eswatini
| | - Jean-Baptiste Rayaisse
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), 01 BP 454, Bobo-Dioulasso 01, Burkina Faso
| | | | - Soumaïla Pagabeleguem
- Insectarium de Bobo Dioulasso-Campagne d'Eradication de la mouche tsetse et de la Trypanosomose (IBD-CETT), 01 BP 1087, Bobo Dioulasso 01, Burkina Faso.,University of Dedougou, B.P. 176, Dédougou 01, Burkina Faso
| | - Chantel J de Beer
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria.,Epidemiology, Vectors and Parasites, Agricultural Research Council-Onderstepoort Veterinary Research, Pretoria, South Africa
| | | | | | - Robert L Mach
- Institute of Chemical, Environmental, and Bioscience Engineering, Vienna University of Technology, Gumpendorfer Straße 1a, 1060, Vienna, Austria
| | - Marc J B Vreysen
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria
| | - Adly M M Abd-Alla
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, 1400, Vienna, Austria.
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Dieng MM, Augustinos AA, Demirbas-uzel G, Doudoumis V, Parker AG, Tsiamis G, Mach RL, Bourtzis K, Abd-alla A. Interactions Between Glossina Pallidipes Salivary Gland Hypertrophy Virus and Tsetse Endosymbionts in Wild Tsetse Populations.. [DOI: 10.21203/rs.3.rs-1139411/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
BackgroundTherefore, tsetse control is considered an effective and sustainable tactic for the control of cyclically transmitted trypanosomosis in the absence of effective vaccines and inexpensive, effective drugs. The sterile insect technique (SIT) is currently used to eliminate tsetse fly populations in an area-wide integrated pest management (AW-IPM) context in Senegal. For SIT, tsetse mass-rearing is a major milestone that associated microbes can influence. Tsetse flies can be infected with micro-organisms, including the primary and obligate Wigglesworthia glossinidia, the commensal Sodalis glossinidius, and Wolbachia pipientis. In addition, tsetse populations often carry a pathogenic DNA virus, the Glossina pallidipes Salivary Gland Hypertrophy Virus (GpSGHV) that hinders tsetse fertility and fecundity. Interactions between symbionts and pathogens might affect the performance of the insect host. MethodsIn the present study, we assessed the possible interaction of GpSGHV and tsetse endosymbionts under field conditions to decipher the bidirectional interactions in different Glossina species. We determined the co-infection pattern of GpSGHV and Wolbachia in natural tsetse populations. We further analyzed the interaction of both Wolbachia and GpSGHV infection with Sodalis and Wigglesworthia density using qPCR. ResultsThe results indicated that the co-infection of GpSGHV and Wolbachia was most prevalent in Glossina austeni and Glossina morsitans morsitans, with an explicit significant negative correlation between GpSGHV and Wigglesworthia infection. GpSGHV infection levels of more than 104 were not observed when Wolbachia infection was present at high density (>108.5), suggesting a potential protective role of Wolbachia against GpSGHV. ConclusionThe result indicates that Wolbachia infection might protect tsetse fly against GpSGHV and the interactions between the tsetse host and its associated microbes are dynamic, likely species-specific and significant differences may exist between laboratory and field conditions.
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Affiliation(s)
| | | | | | | | | | | | - Robert L. Mach
- Vienna University of Technology: Technische Universitat Wien
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Gregoire-Gauthier J, Durrieu L, Duval A, Fontaine F, Dieng MM, Bourgey M, Patey-Mariaud de Serre N, Louis I, Haddad E. Use of immunoglobulins in the prevention of GvHD in a xenogeneic NOD/SCID/γc- mouse model. Bone Marrow Transplant 2011; 47:439-50. [PMID: 21572464 DOI: 10.1038/bmt.2011.93] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The efficacy of IVIG in preventing GvHD has not been definitely demonstrated clinically. Using a xenogeneic model of GvHD in NOD/SCID/γc- (NSG) mice, we showed that weekly administration of IVIG significantly reduced the incidence and associated mortality of GvHD to a degree similar to CsA. Unlike CsA and OKT3, IVIG were not associated with inhibition of human T-cell proliferation in mice. Instead, IVIG significantly inhibited the secretion of human IL-17, IL-2, IFN-γ and IL-15 suggesting that IVIG prevented GvHD by immunomodulation. Furthermore, the pattern of modification of the human cytokine storm differed from that observed with CsA and OKT3. Finally, in a humanized mouse model of immune reconstitution, in which NSG mice were engrafted with human CD34(+) stem cells, IVIG transiently inhibited B-cell reconstitution, whereas peripheral T-cell reconstitution and thymopoiesis were unaffected. Together these in vivo data raise debate related to the appropriateness of IVIG in GvHD prophylaxis. In addition, this model provides an opportunity to further elucidate the precise mechanism(s) by which IVIG inhibit GvHD.
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Affiliation(s)
- J Gregoire-Gauthier
- CHU Sainte-Justine Research Center, Center de Cancérologie Charles-Bruneau, 3175 chemin de la Côte-Ste-Catherine, Montréal, Québec, Canada
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8
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Dem A, Traore B, Diallo BK, Mbodj M, Dieng MM, Kasse AA, Dangou JM, Diouf R, Toure P. [Primary lymphoma of the thyroid: a case report]. Dakar Med 2004; 49:10-2. [PMID: 15782469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Primary lymphoma of the thyroid is an uncommon disease. It diagnosis is difficult without immunohistochemestry. We report a case of thyroid lymphoma diagnosed at the A. Le Dantec Hospital of Dakar. A 22-year old young man presented anterior neck mass. Clinical examination showed a thyroid mass with a susclavicular palpable lymph node. The scintigraphy demonstrated that the mass was cold. Total thyroidectomy with cervical lymphadenectomy was the first treatment. Histological examination of the surgical specimen concluded that the mass was an anaplastic lymphoma (large cells type) involving the sus clavicular lymph nodes (stage IIE). Chemotherapy was administrated after one month with C-MOPP schedule. The patient presented no recurrent sign after 30 month. Fine needle aspiration and immunocytochemestry of the thyroid cold masses will contribute in an accurate diagnosis and the management of disease in our institution.
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Affiliation(s)
- A Dem
- Institut du Cancer, Université Cheikk Anta Diop, Dakar, Sénégal
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Dotou CR, Dieng MM, Zamble BIL, Lafarge H. [Toward strengthening the health politics in Africa: the military health system and its contribution to health policy in Senegal]. Bull Soc Pathol Exot 2004; 97:329-33. [PMID: 15787265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Since the following days of independences, the Senegalese army mission has mainly consisted in defending the national territory integrity and in ensuring the protection of the populations and their goods. In the public health system, thanks to the quality of its human resources the army intervenes specifically at every level of the health care structure. The mission assigned to the Senegalese army health unit is therefore multidimensional. In 2001, the operational budget of the army health services is estimated at 177 millions CFA F (265500 euros), its medical consumption at 212 millions CFA F (323 000 Euros) and its health expenditure at 385 millions CFA F (585 000 euros). The army supports the government health policies in different ways: on the one hand, availability of the ministry of health staff, on the other hand, the direct involvement in health care and the implementation of the national and international health programmes.
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Affiliation(s)
- C R Dotou
- Centre africain détudes supérieures en gestion (CESAG), BP 21944 Dakar Ponty, Sénégal.
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