The role of moving duck flocks in the spread of Highly Pathogenic Avian Influenza (HPAI) virus in Vietnam and Indonesia

Henning, J., Henning, K., Vu, Le Tri, Yulianto, Didik and Meers, J. (2009). The role of moving duck flocks in the spread of Highly Pathogenic Avian Influenza (HPAI) virus in Vietnam and Indonesia. In: International Symposia on Veterinary Epidemiology and Economics (ISVEE) proceedings. 12th Symposium of the International Society for Veterinary Epidemiology and Economics ISVEE 12, Durban, South Africa, (30-30). 9-14 August 2009.


Author Henning, J.
Henning, K.
Vu, Le Tri
Yulianto, Didik
Meers, J.
Title of paper The role of moving duck flocks in the spread of Highly Pathogenic Avian Influenza (HPAI) virus in Vietnam and Indonesia
Conference name 12th Symposium of the International Society for Veterinary Epidemiology and Economics ISVEE 12
Conference location Durban, South Africa
Conference dates 9-14 August 2009
Proceedings title International Symposia on Veterinary Epidemiology and Economics (ISVEE) proceedings
Place of Publication Australasian e-library of Veterinary and Animal Sciences
Publisher SciQuest
Publication Year 2009
Sub-type Fully published paper
ISSN 1177-360X
Start page 30
End page 30
Total pages 1
Language eng
Abstract/Summary Moving or nomadic duck flocks in SE-Asia are flocks that are frequently transported to areas where they can find suitable feed, in particular in rice paddies after the harvest. Using rapid rural appraisal methods we interviewed moving duck owners in the Mekong Delta of Viet Nam and in Central Java of Indonesia to describe their management system. The characteristics of the moving duck production system appear to be conducive to these ducks spreading and transmitting HPAI virus to other birds: 1) Flocks are moved frequently and quickly over large distances, 2) Flocks use many different scavenging areas, 3) Flocks are exposed to numerous HPAI risk factors, such as having contact with other scavenging ducks, wild birds and domestic animals, and 4) A large number of people are involved in transport and management of these flocks. In Viet Nam, movement of ducks is usually conducted with boats and trucks over long distances (median distance travelled per year: 80km) throughout most of the year (travel duration per year: 30-285 days), while in Indonesia flocks travel shorter distances during just a few months of the year and are transported on motorbikes, cars or herded by foot. Moving duck flocks in Viet Nam are larger than in Indonesia and are usually moved as single flocks owned by only one farmer, whereas in Indonesia, flocks of several owners often share transport. In additional field studies, 48 Vietnamese and 54 Indonesian moving duck flocks were monitored over a period of 6 months with blood samples being collected from individual birds. Overall crude bird-level HPAI H5 antibody prevalence (HI titre≥16) was about 15.5% in Viet Nam and 5.3% in Indonesia.
Subjects 0707 Veterinary Sciences
070704 Veterinary Epidemiology
Keyword Pathogenic Avian Influenza virus
Moving duck flocks
Vietnam
Indonesia
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Theme 2 - Investigation of determinants and distribution of disease: Avian influenza, Disease distribution & determinants (paper # T2-1.2.4)

Document type: Conference Paper
Collection: School of Veterinary Science Publications
 
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Created: Mon, 27 Sep 2010, 09:07:40 EST by Thelma Whitbourne on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc