Classical Swine Fever In Japan

JAPAN - This is a report via OIE on the detection of Classical Swine Fever vaccine case in Japan.

29 March 2004

3 minute read

Emergency report

Information received on 23 March 2004 from Dr Masako Kurimoto, Director of Animal Health and Animal Products Safety Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo:

Date of the report: 23 March 2004.

Date of initial detection of animal health incident: 22 March 2004.

Estimated date of primary infection: December 2003.

Outbreaks:

Location	No. of outbreaks
Kagoshima prefecture	1 farm

Description of affected population: fattening pigs.

Total number of animals in the outbreak:

*species*	*susceptible*	*cases*	*deaths*	*destroyed*	*slaughtered*
sui	1,144	...	...	...	...

Diagnosis:

On receiving notification from the abattoir of six hyposthenic pigs rejected at post-mortem examination, the prefectural Livestock Hygiene Service Centre inspected the farm from which the weak pigs had been shipped on 17 March 2004. Pigs on the farm were sampled and tested.

A. Diagnostic tests used:

- ELISA (enzyme-linked immunosorbent assay): positive;

- fluorescent antibody test: negative;

- virus isolation: positive.

B. Causal agent: classical swine fever virus of vaccine origin.

Epidemiology:

A. Source of agent / origin of infection: in the process of an epidemiological investigation, the manager of the farm admitted having applied unapproved vaccine to these pigs in December 2003. The origin of the vaccine is under investigation.

B. Other epidemiological details: all holdings within a 3-km zone (58 farms) have been serologically tested and no other case has been confirmed.

Control measures: all pigs reared in the affected farm will be destroyed.