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

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 outbr...

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Bibliographic Details
Published in:eLife 2020-08, Vol.9
Main Authors: Delabouglise, Alexis, Thanh, Nguyen Thi Le, Xuyen, Huynh Thi Ai, Nguyen-Van-Yen, Benjamin, Tuyet, Phung Ngoc, Lam, Ha Minh, Boni, Maciej F
Format: Article
Language:English
Subjects:
Agricultural industry
Animal behavior
Animal Husbandry - statistics & numerical data
Animals
Avian influenza
Avian influenza viruses
behavioral epidemiology
Disease Outbreaks - statistics & numerical data
Disease Outbreaks - veterinary
Disease transmission
Disinfection - statistics & numerical data
Epidemics
Epidemiology and Global Health
Farmers
Farms - statistics & numerical data
health behavior
health economics
Humans
Infection control
Influenza in Birds
Influenza vaccines
Life Sciences
Livestock farms
livestock systems
Longitudinal Studies
Medical research
Microbiology and Infectious Disease
Models, Statistical
Poultry
Poultry industry
poultry production
Prevention
Rivers
Santé publique et épidémiologie
Vaccination
Vaccination - statistics & numerical data
Vaccination - veterinary
Vietnam
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Summary: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.
ISSN:2050-084X
2050-084X
DOI:10.7554/eLife.59212