Associations between attributes of live poultry trade and HPAI H5N1 outbreaks: A descriptive and network analysis study in northern Vietnam

Soares Magalhaes, Ricardo J., Ortiz-Pelaez, Angel, Kim, Lan Lai Thi, Quoc, Hoang Dinh, Otte, Joachim and Pfeiffer, Dirk U. (2010) Associations between attributes of live poultry trade and HPAI H5N1 outbreaks: A descriptive and network analysis study in northern Vietnam. BMC Veterinary Research, 6 . doi:10.1186/1746-6148-6-10


Author Soares Magalhaes, Ricardo J.
Ortiz-Pelaez, Angel
Kim, Lan Lai Thi
Quoc, Hoang Dinh
Otte, Joachim
Pfeiffer, Dirk U.
Title Associations between attributes of live poultry trade and HPAI H5N1 outbreaks: A descriptive and network analysis study in northern Vietnam
Journal name BMC Veterinary Research   Check publisher's open access policy
ISSN 1746-6148
Publication date 2010-02-22
Sub-type Article (original research)
DOI 10.1186/1746-6148-6-10
Open Access Status DOI
Volume 6
Total pages 13
Collection year 2011
Language eng
Subject 0707 Veterinary Sciences
Formatted abstract
Background: The structure of contact between individuals plays an important role in the incursion and spread of contagious diseases in both human and animal populations. In the case of avian influenza, the movement of live birds is a well known risk factor for the geographic dissemination of the virus among poultry flocks. Live bird markets (LBM's) contribute to the epidemiology of avian influenza due to their demographic characteristics and the presence of HPAI H5N1 virus lineages. The relationship between poultry producers and live poultry traders (LPT's) that operate in LBM's has not been adequately documented in HPAI H5N1-affected SE Asian countries. The aims of this study were to document and study the flow of live poultry in a poultry trade network in northern Vietnam, and explore its potential role in the risk for HPAI H5N1 during 2003 to 2006.

Results: Our results indicate that LPT's trading for less than a year and operating at retail markets are more likely to source poultry from flocks located in communes with a past history of HPAI H5N1 outbreaks during 2003 to 2006 than LPT's trading longer than a year and operating at wholesale markets. The results of the network analysis indicate that LPT's tend to link communes of similar infection status.

Conclusions: Our study provides evidence which can be used for informing policies aimed at encouraging more biosecure practices of LPT's operating at authorised LBM's. The results suggest that LPT's play a role in HPAI H5N1 transmission and may contribute to perpetuating HPAI H5N1 virus circulation amongst certain groups of communes. The impact of current disease prevention and control interventions could be enhanced by disseminating information about outbreak risk and the implementation of a formal data recording scheme at LBM's for all incoming and outgoing LPT's.
© 2010 Magalhães et al; licensee BioMed Central Ltd

Keyword Pathogenic avian influenza
Bird markets
Hong Kong
Great Britain
United States
Viruses
Risk
Surveillance
Movements
China
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article#10, pp.1-13

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Public Health Publications
 
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Created: Sun, 04 Apr 2010, 00:06:59 EST