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Analysis of Swine Movements in a Province in Northern Vietnam and Application in the Design of Surveillance Strategies for Infectious Diseases
Author(s) -
Baudon E.,
Fournié G.,
Hiep D. T.,
Pham T. T. H.,
Duboz R.,
Gély M.,
Peiris M.,
Cowling B. J.,
Ton V. D.,
Peyre M.
Publication year - 2017
Publication title -
transboundary and emerging diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.392
H-Index - 63
eISSN - 1865-1682
pISSN - 1865-1674
DOI - 10.1111/tbed.12380
Subject(s) - pig farming , agriculture , disease surveillance , limiting , vietnamese , livestock , african swine fever , disease control , disease , veterinary medicine , geography , business , animal production , biology , microbiology and biotechnology , medicine , zoology , engineering , virology , mechanical engineering , linguistics , philosophy , virus , archaeology , pathology , forestry
Summary While swine production is rapidly growing in S outh‐ E ast A sia, the structure of the swine industry and the dynamic of pig movements have not been well‐studied. However, this knowledge is a prerequisite for understanding the dynamic of disease transmission in swine populations and designing cost‐effective surveillance strategies for infectious diseases. In this study, we assessed the farming and trading practices in the V ietnamese swine familial farming sector, which accounts for most pigs in V ietnam, and for which disease surveillance is a major challenge. Farmers from two communes of a R ed R iver D elta P rovince (northern V ietnam) were interviewed, along with traders involved in pig transactions. Major differences in the trade structure were observed between the two communes. One commune had mainly transversal trades, that is between farms of equivalent sizes, whereas the other had pyramidal trades, that is from larger to smaller farms. Companies and large familial farrow‐to‐finish farms were likely to act as major sources of disease spread through pig sales, demonstrating their importance for disease control. Familial fattening farms with high pig purchases were at greater risk of disease introduction and should be targeted for disease detection as part of a risk‐based surveillance. In contrast, many other familial farms were isolated or weakly connected to the swine trade network limiting their relevance for surveillance activities. However, some of these farms used boar hiring for breeding, increasing the risk of disease spread. Most familial farms were slaughtering pigs at the farm or in small local slaughterhouses, making the surveillance at the slaughterhouse inefficient. In terms of spatial distribution of the trades, the results suggested that northern provinces were highly connected and showed some connection with central and southern provinces. These results are useful to develop risk‐based surveillance protocols for disease detection in the swine familial sector and to make recommendations for disease control.