Poultry farmer response to disease outbreaks in smallholder farming systems in southern Vietnam.

Autor:	Delabouglise A; Center for Infectious Diseases Dynamics, The Pennsylvania State University, University Park, United States.; UMR ASTRE, CIRAD, INRAE, Université de Montpellier, Montpellier, France., Thanh NTL; Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Viet Nam., Xuyen HTA; Ca Mau sub-Department of Livestock Production and Animal Health, Ca Mau, Viet Nam., Nguyen-Van-Yen B; Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Viet Nam.; École Normale Supérieure, CNRS UMR 8197, Paris, France., Tuyet PN; Ca Mau sub-Department of Livestock Production and Animal Health, Ca Mau, Viet Nam., Lam HM; Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Viet Nam.; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom., Boni MF; Center for Infectious Diseases Dynamics, The Pennsylvania State University, University Park, United States.; Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Viet Nam.; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
Jazyk:	angličtina
Zdroj:	ELife [Elife] 2020 Aug 25; Vol. 9. Date of Electronic Publication: 2020 Aug 25.
DOI:	10.7554/eLife.59212
Abstrakt:	Avian influenza outbreaks have been occurring on smallholder poultry farms in Asia for two decades. Farmer responses to these outbreaks can slow down or accelerate virus transmission. We used a longitudinal survey of 53 small-scale chicken farms in southern Vietnam to investigate the impact of outbreaks with disease-induced mortality on harvest rate, vaccination, and disinfection behaviors. We found that in small broiler flocks (≤16 birds/flock) the estimated probability of harvest was 56% higher when an outbreak occurred, and 214% higher if an outbreak with sudden deaths occurred in the same month. Vaccination and disinfection were strongly and positively correlated with the number of birds. Small-scale farmers - the overwhelming majority of poultry producers in low-income countries - tend to rely on rapid sale of birds to mitigate losses from diseases. As depopulated birds are sent to markets or trading networks, this reactive behavior has the potential to enhance onward transmission. Competing Interests: AD, NT, HX, BN, PT, HL, MB No competing interests declared (© 2020, Delabouglise et al.)
Databáze:	MEDLINE
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