Highly pathogenic avian influenza, Vietnam

Information received on 03/03/2010 from Dr Nam Hoang Van, Director General, Department of Animal Health, Ministry of Agriculture and Rural Development , Hanoi, Vietnam

Summary

New outbreaks

Outbreak 1	Cap Tien, Son Duong, TUYEN QUANG
Date of start of the outbreak	26/02/2010
Outbreak status	Resolved (15/03/2010)
Epidemiological unit	Village
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 180 57 43 120 0
Outbreak 2	Hung Hoa, Hung Hoa, Vinh Township, NGHE AN
Date of start of the outbreak	16/02/2010
Outbreak status	Resolved (10/03/2010)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 500 50 50 450 0
Outbreak 3	Village No.12A, Khanh Binh Dong, Tran Van Thoi, CA MAU
Date of start of the outbreak	12/02/2010
Outbreak status	Resolved (12/03/2010)
Epidemiological unit	Village
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 500 125 125 375 0
Outbreak 4	Ninh Phung, Ninh Hoa, KHANH HOA
Date of start of the outbreak	24/01/2010
Outbreak status	Resolved (24/03/2010)
Epidemiological unit	Village
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 770 450 420 350 0
Outbreak 5	Group No. 16, Nguyen Trai, Ha Giang Township, HA GIANG
Date of start of the outbreak	25/02/2010
Outbreak status	Resolved (16/03/2010)
Epidemiological unit	Village
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 98 94 94 4 0
Outbreak 6	Village No. 10, Nguyen Phich, U Minh, CA MAU
Date of start of the outbreak	22/02/2010
Outbreak status	Resolved (17/03/2010)
Epidemiological unit	Village
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 90 62 62 28 0
Outbreak 7	Van Phu, Van Phu, Van Ninh, KHANH HOA
Date of start of the outbreak	24/02/2010
Outbreak status	Resolved (15/03/2010)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 6000 2500 2000 4000 0
Summary of outbreaks	Total outbreaks: 7
Total animals affected	Species Susceptible Cases Deaths Destroyed Slaughtered Birds 8138 3338 2794 5327 0
Outbreak statistics	Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 41.02% 34.33% 83.70% 99.79% * Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection

Introduction of new live animals Illegal movement of animals Fomites (humans, vehicles, feed, etc.)

Control measures

Measures applied	Quarantine Movement control inside the country Disinfection of infected premises/establishment(s) Modified stamping out No vaccination No treatment of affected animals
Measures to be applied	Screening Zoning Vaccination in response to the outbreak (s)

Diagnostic test results

Laboratory name and type	Regional Animal Health Office No. 7 (National laboratory)
Tests and results	Species Test Test date Result Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 20/02/2010 Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations

Location of current outbreaks

Click on map to zoom in.