Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.

Outbreaks of highly pathogenic avian influenza have occurred and have been studied in a variety of ecological systems. However, differences in the spatial resolution, geographical extent, units of analysis and risk factors examined in these studies prevent their quantitative comparison. This study a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mathilde C Paul, Marius Gilbert, Stéphanie Desvaux, Harena Rasamoelina Andriamanivo, Marisa Peyre, Nguyen Viet Khong, Weerapong Thanapongtharm, Véronique Chevalier
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7d68e11adc1742ea84c1f446debf0196
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7d68e11adc1742ea84c1f446debf0196
record_format	dspace
spelling	oai:doaj.org-article:7d68e11adc1742ea84c1f446debf01962021-11-25T06:08:15ZAgro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.1932-620310.1371/journal.pone.0101958https://doaj.org/article/7d68e11adc1742ea84c1f446debf01962014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25029441/?tool=EBIhttps://doaj.org/toc/1932-6203Outbreaks of highly pathogenic avian influenza have occurred and have been studied in a variety of ecological systems. However, differences in the spatial resolution, geographical extent, units of analysis and risk factors examined in these studies prevent their quantitative comparison. This study aimed to develop a high-resolution, comparative study of a common set of agro-environmental determinants of avian influenza viruses (AIV) in domestic poultry in four different environments: (1) lower-Northern Thailand, where H5N1 circulated in 2004-2005, (2) the Red River Delta in Vietnam, where H5N1 is circulating widely, (3) the Vietnam highlands, where sporadic H5N1 outbreaks have occurred, and (4) the Lake Alaotra region in Madagascar, which features remarkable similarities with Asian agro-ecosystems and where low pathogenic avian influenza viruses have been found. We analyzed H5N1 outbreak data in Thailand in parallel with serological data collected on the H5 subtype in Vietnam and on low pathogenic AIV in Madagascar. Several agro-environmental covariates were examined: poultry densities, landscape dominated by rice cultivation, proximity to a water body or major road, and human population density. Relationships between covariates and AIV circulation were explored using spatial generalized linear models. We found that AIV prevalence was negatively associated with distance to the closest water body in the Red River Delta, Vietnam highlands and Madagascar. We also found a positive association between AIV and duck density in the Vietnam highlands and Thailand, and with rice landscapes in Thailand and Madagascar. Our findings confirm the important role of wetlands-rice-ducks ecosystems in the epidemiology of AI in diverse settings. Variables influencing circulation of the H5 subtype in Southeast Asia played a similar role for low pathogenic AIV in Madagascar, indicating that this area may be at risk if a highly virulent strain is introduced.Mathilde C PaulMarius GilbertStéphanie DesvauxHarena Rasamoelina AndriamanivoMarisa PeyreNguyen Viet KhongWeerapong ThanapongtharmVéronique ChevalierPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 7, p e101958 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mathilde C Paul Marius Gilbert Stéphanie Desvaux Harena Rasamoelina Andriamanivo Marisa Peyre Nguyen Viet Khong Weerapong Thanapongtharm Véronique Chevalier Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
description	Outbreaks of highly pathogenic avian influenza have occurred and have been studied in a variety of ecological systems. However, differences in the spatial resolution, geographical extent, units of analysis and risk factors examined in these studies prevent their quantitative comparison. This study aimed to develop a high-resolution, comparative study of a common set of agro-environmental determinants of avian influenza viruses (AIV) in domestic poultry in four different environments: (1) lower-Northern Thailand, where H5N1 circulated in 2004-2005, (2) the Red River Delta in Vietnam, where H5N1 is circulating widely, (3) the Vietnam highlands, where sporadic H5N1 outbreaks have occurred, and (4) the Lake Alaotra region in Madagascar, which features remarkable similarities with Asian agro-ecosystems and where low pathogenic avian influenza viruses have been found. We analyzed H5N1 outbreak data in Thailand in parallel with serological data collected on the H5 subtype in Vietnam and on low pathogenic AIV in Madagascar. Several agro-environmental covariates were examined: poultry densities, landscape dominated by rice cultivation, proximity to a water body or major road, and human population density. Relationships between covariates and AIV circulation were explored using spatial generalized linear models. We found that AIV prevalence was negatively associated with distance to the closest water body in the Red River Delta, Vietnam highlands and Madagascar. We also found a positive association between AIV and duck density in the Vietnam highlands and Thailand, and with rice landscapes in Thailand and Madagascar. Our findings confirm the important role of wetlands-rice-ducks ecosystems in the epidemiology of AI in diverse settings. Variables influencing circulation of the H5 subtype in Southeast Asia played a similar role for low pathogenic AIV in Madagascar, indicating that this area may be at risk if a highly virulent strain is introduced.
format	article
author	Mathilde C Paul Marius Gilbert Stéphanie Desvaux Harena Rasamoelina Andriamanivo Marisa Peyre Nguyen Viet Khong Weerapong Thanapongtharm Véronique Chevalier
author_facet	Mathilde C Paul Marius Gilbert Stéphanie Desvaux Harena Rasamoelina Andriamanivo Marisa Peyre Nguyen Viet Khong Weerapong Thanapongtharm Véronique Chevalier
author_sort	Mathilde C Paul
title	Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
title_short	Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
title_full	Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
title_fullStr	Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
title_full_unstemmed	Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.
title_sort	agro-environmental determinants of avian influenza circulation: a multisite study in thailand, vietnam and madagascar.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/7d68e11adc1742ea84c1f446debf0196
work_keys_str_mv	AT mathildecpaul agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT mariusgilbert agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT stephaniedesvaux agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT harenarasamoelinaandriamanivo agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT marisapeyre agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT nguyenvietkhong agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT weerapongthanapongtharm agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar AT veroniquechevalier agroenvironmentaldeterminantsofavianinfluenzacirculationamultisitestudyinthailandvietnamandmadagascar
_version_	1718414172141649920

Agro-environmental determinants of avian influenza circulation: a multisite study in Thailand, Vietnam and Madagascar.

Ejemplares similares