Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros.
Rift Valley fever virus (RVFV) is an arthropod-borne phlebovirus reported to be circulating in most parts of Africa. Since 2009, RVFV has been suspected of continuously circulating in the Union of Comoros. To estimate the incidence of RVFV antibody acquisition in the Comorian ruminant population, 19...
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2014
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oai:doaj.org-article:f2fc54ab90e54c28bdc54f842a1ebb962021-11-25T06:32:19ZEvidence for circulation of the rift valley fever virus among livestock in the union of Comoros.1935-27271935-273510.1371/journal.pntd.0003045https://doaj.org/article/f2fc54ab90e54c28bdc54f842a1ebb962014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25078616/?tool=EBIhttps://doaj.org/toc/1935-2727https://doaj.org/toc/1935-2735Rift Valley fever virus (RVFV) is an arthropod-borne phlebovirus reported to be circulating in most parts of Africa. Since 2009, RVFV has been suspected of continuously circulating in the Union of Comoros. To estimate the incidence of RVFV antibody acquisition in the Comorian ruminant population, 191 young goats and cattle were selected in six distinct zones and sampled periodically from April 2010 to August 2011. We found an estimated incidence of RVFV antibody acquisition of 17.5% (95% confidence interval (CI): [8.9-26.1]) with a significant difference between islands (8.2% in Grande Comore, 72.3% in Moheli and 5.8% in Anjouan). Simultaneously, a longitudinal entomological survey was conducted and ruminant trade-related information was collected. No RVFV RNA was detected out of the 1,568 blood-sucking caught insects, including three potential vectors of RVFV mosquito species. Our trade survey suggests that there is a continuous flow of live animals from eastern Africa to the Union of Comoros and movements of ruminants between the three Comoro islands. Finally, a cross-sectional study was performed in August 2011 at the end of the follow-up. We found an estimated RVFV antibody prevalence of 19.3% (95% CI: [15.6%-23.0%]). Our findings suggest a complex RVFV epidemiological cycle in the Union of Comoros with probable inter-islands differences in RVFV circulation patterns. Moheli, and potentially Anjouan, appear to be acting as endemic reservoir of infection whereas RVFV persistence in Grande Comore could be correlated with trade in live animals with the eastern coast of Africa. More data are needed to estimate the real impact of the disease on human health and on the national economy.Matthieu RogerMarina BeralSéverine LicciardiMiradje SouléAbdourahime FaharoudineCoralie ForayMarie-Marie OliveMarianne MaquartAbdouroihamane SoulaimaneAhmed Madi KassimCatherine Cêtre-SossahEric CardinalePublic Library of Science (PLoS)articleArctic medicine. Tropical medicineRC955-962Public aspects of medicineRA1-1270ENPLoS Neglected Tropical Diseases, Vol 8, Iss 7, p e3045 (2014) |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
| spellingShingle |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Matthieu Roger Marina Beral Séverine Licciardi Miradje Soulé Abdourahime Faharoudine Coralie Foray Marie-Marie Olive Marianne Maquart Abdouroihamane Soulaimane Ahmed Madi Kassim Catherine Cêtre-Sossah Eric Cardinale Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| description |
Rift Valley fever virus (RVFV) is an arthropod-borne phlebovirus reported to be circulating in most parts of Africa. Since 2009, RVFV has been suspected of continuously circulating in the Union of Comoros. To estimate the incidence of RVFV antibody acquisition in the Comorian ruminant population, 191 young goats and cattle were selected in six distinct zones and sampled periodically from April 2010 to August 2011. We found an estimated incidence of RVFV antibody acquisition of 17.5% (95% confidence interval (CI): [8.9-26.1]) with a significant difference between islands (8.2% in Grande Comore, 72.3% in Moheli and 5.8% in Anjouan). Simultaneously, a longitudinal entomological survey was conducted and ruminant trade-related information was collected. No RVFV RNA was detected out of the 1,568 blood-sucking caught insects, including three potential vectors of RVFV mosquito species. Our trade survey suggests that there is a continuous flow of live animals from eastern Africa to the Union of Comoros and movements of ruminants between the three Comoro islands. Finally, a cross-sectional study was performed in August 2011 at the end of the follow-up. We found an estimated RVFV antibody prevalence of 19.3% (95% CI: [15.6%-23.0%]). Our findings suggest a complex RVFV epidemiological cycle in the Union of Comoros with probable inter-islands differences in RVFV circulation patterns. Moheli, and potentially Anjouan, appear to be acting as endemic reservoir of infection whereas RVFV persistence in Grande Comore could be correlated with trade in live animals with the eastern coast of Africa. More data are needed to estimate the real impact of the disease on human health and on the national economy. |
| format |
article |
| author |
Matthieu Roger Marina Beral Séverine Licciardi Miradje Soulé Abdourahime Faharoudine Coralie Foray Marie-Marie Olive Marianne Maquart Abdouroihamane Soulaimane Ahmed Madi Kassim Catherine Cêtre-Sossah Eric Cardinale |
| author_facet |
Matthieu Roger Marina Beral Séverine Licciardi Miradje Soulé Abdourahime Faharoudine Coralie Foray Marie-Marie Olive Marianne Maquart Abdouroihamane Soulaimane Ahmed Madi Kassim Catherine Cêtre-Sossah Eric Cardinale |
| author_sort |
Matthieu Roger |
| title |
Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| title_short |
Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| title_full |
Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| title_fullStr |
Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| title_full_unstemmed |
Evidence for circulation of the rift valley fever virus among livestock in the union of Comoros. |
| title_sort |
evidence for circulation of the rift valley fever virus among livestock in the union of comoros. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2014 |
| url |
https://doaj.org/article/f2fc54ab90e54c28bdc54f842a1ebb96 |
| work_keys_str_mv |
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| _version_ |
1718413717082734592 |