Avian Flu Diary: Japan MAFF: 35th & 36th Farm Outbreak Of CSF

#14,233

Classical Swine Fever (CSF) re-emerged in Japan in September of 2018 after an absence of 26 years, initially affecting wild boar and a handful of farms in Gifu prefecture. Exactly how it arrived has never been determined.

By the end of 2018, the first farm (and wild boar) in neighboring Aichi Prefecture would test positive as well.

CSF is similar to African Swine Fever (ASF), but is caused by a different virus (genus Pestivirus, family Flaviviridae). Neither pose a threat to human health, but both can be devastating to the swine industry.

Over the past three weeks we've seen farm outbreaks expand to a 3rd (Mie) and 4th Prefecture (Fukui). In July the OIE reported wild boar in Mie Prefecture tested positive, but yesterday the OIE announced that a small number of wild boar in both Fukui and Nagano have recently tested positive as well.

Today we have two (translated) farm outbreak reports - both from Aichi Prefecture - along with additional details from yesterday's OIE report.

Confirmation of suspected affected animals of swine fever in Aichi Prefecture, about (35 case was in Japan)

Ryowa first year on August 9,

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 Toyota City, Aichi 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: Toyota City, Aichi Prefecture
breeding situation: 307 head

2. Background

(1) Aichi Prefecture, August 8 (Thursday), 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 (August 9 (Friday)), turned out to be a suspected affected animals of swine fever want did.

(Continue . . . )

Confirmation of suspected affected animals of swine fever in Aichi Prefecture for the (domestic 36 cases eyes)

Ryowa first year on August 9,

the Ministry of Agriculture, Forestry and Fisheries

From yesterday, was subjected to a cleanliness check inspection of swine fever in Aichi Prefecture Nogyosogoshikenjo of Aichi Prefecture, Nagakute in the domestic 30 cases eyes of movement restricted area, today, suspected affected animals has been confirmed.

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. generation facility Overview of

Location: Aichi Prefecture, Nagakute
breeding situation: 707 head

2. Background

(1) Aichi Prefecture, August 8 (Thursday), in order to perform a clean confirmation inspection of swine fever in Aichi Prefecture Nogyosogoshikenjo of the prefecture Nagakute in the domestic 30 cases eyes of movement restricted area, livestock quarantine we conducted a site inspection by the members.
(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 (August 9 (Friday)), turned out to be a suspected affected animals of swine fever want did.

(Continue . . . )

Some additional details from yesterdays OIE update (#33).

Summary of the wild boar surveillance (As of 24th July)

[Gifu prefecture (since 13th of September)] Tested (RT-PCR): 1,643 wild boars (344 dead and 1,299 captured), Positive: 742 (257 dead and 485 captured),

[Aichi prefecture (since 14th of September 2018)] Tested (RT-PCR): 623 wild boars (29 dead and 594 captured), Positive: 44 wild boars (13 dead and 31 captured), [

Nagano prefecture (since 14th of September 2018)] Tested (RT-PCR): 118 wild boars (59 dead and 59 captured), Positive: 15 (12 dead and 3 captured),

[Mie prefecture (since 14th of September 2018)] Tested (RT-PCR): 44 wild boars (7 dead and 37 captured), Positive: 4 (0 dead and 4 captured),

[Fukui prefecture (since 14th September 2018)] Tested (RT-PCR): 39 wild boars (5 dead and 34 captured), Positive: 7 (0 dead and 7 captured),

[Other 38 prefectures (since 14th of September 2018) Tested (RT-PCR): 275 wild boars (258 dead and 17 captured), Positive: 0,

Note 1: 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.

Note 2: About Shipment restriction and Movement restriction. When CSF outbreaks happen, Japan has implemented Shipment Restriction Zone (SRZ), which is established within 3-10 km radius of the affected farm, and Movement Restriction Zone (MRZ), which is established within 3km radius of the affected farm. SRZ will be lifted when both all the results of active surveillance program are negative, and 17 days have passed after the completion of full implementation of control measures (stamping out, disinfection etc.). MRZ will be lifted when both all the results of active surveillance program are negative, and 28 days have passed after the completion of full implementation of control measures (stamping out, disinfection etc.)

While Gifu Prefecture remains the epicenter of this (nearly year-long) outbreak, we've seen not only a geographic expansion, but an acceleration of outbreaks in the past few months.

It took Japan more than 5 months (164 days) to report their first 10 farm outbreaks, but we've seen that number more than triple since mid-February, with 26 new outbreaks over the past 171 days.

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