Avian Flu Diary: Japan MAFF: 25th Farm Outbreak Of CSF

#14,110

While China, Vietnam, Cambodia, Mongolia, and North Korea battle the recent arrival of African Swine Fever (ASF), Japan finds itself combating a different swine virus - Classical Swine Fever (CSF) - which arrived unexpectedly in Gifu Prefecture 9 months ago.

Both diseases are highly contagious, and can be economically devastating for pork producers, but neither disease poses a direct human health threat.

Over the first 6 months, Japan reported just 10 farms affected. But since early March we've seen that pace pick up, with 15 farms infected over the past 12 weeks. The number of CSF-positive wild boar detected has similarly increased over the past 3 months.

Details on the 25th farm affected come from this translated report from Japan's Ministry of Agriculture (MAFF).

Confirmation of suspected affected animals of swine fever in Gifu Prefecture, about (25 case was in Japan)

Ryowa first year June 5,

the Ministry of Agriculture, Forestry and Fisheries Today, suspected affected animals of swine fever has been confirmed in wild boar positive confirmation point from there within 10km monitored which has been a Gifu, Yamagata Prefecture farm.

We are taken all possible measures for the quarantine measures for the disease.

Interview in the field, thank you for your cooperation as strictly refrain from such that there is a risk that cause the spread of the disease.

1. Overview of the occurrence farm

Location: Gifu Prefecture Yamagata City
breeding situation: 8,122 head
2. Background

(1) Gifu Prefecture, June 4 (Tuesday), from the farm, received a report of a breeding pig has exhibited abnormal, we conducted a site inspection by animal health inspectors.

(2) the same day, because the suspicion of swine fever is caused by the inspection at the Livestock Hygiene Service Center, was subjected to a thorough examination, today (June 5 (Wednesday)), turned out to be a suspected affected animals of swine fever want did.

While farm-to-farm transmission has been documented in some of these outbreaks, the virus has also been detected in hundreds of wild boar in the region (particularly in Gifu Prefecture), and they appear to be a major contributor to its spread.

The most recent OIE Summary (May 26th) reads:

Summary of the wild boar surveillance

As of the 23th May 1152 wild boars (235 dead and 917 captured) in Gifu prefecture have been tested and 429 (175 dead and 254 captured) were found to be positive for CSF virus (CSFV) by RT-PCR since 13th of September 2018.

315 wild boars (17 dead and 298 captured) in Aichi prefecture have been tested and 18 were found to be positive (2 dead and 16 captured) for CSFV by RT-PCR since 14th of September 2018.

Among the other prefectures, 302 wild boars (275 dead and 27 captured) in 40 prefectures were tested and all were found to be negative for CSFV by RT-PCR since the 14th of September 2018.

Note: Vaccination policy in Japan is that vaccination for domestic animals only is prohibited. Since 24th March 2019, oral vaccine (bait vaccine) have been applied to wild boars in selected area in Gifu and Aichi prefecture where CSF positive cases have been found in wild boars.

As of May, 2019 the OIE lists the following 36 nations as being free from Classical Swine Fever.