The World Ogranisation for Animal Health (OIE) received follow-up report no.4 yesterday, 20 October. According to the report, the outbreaks occured at several farms in the Pyrénées-Atlantiques region.
A total of 15 animals were affected. All affected animals were slaughtered.
The source of the outbreak has not been discovered.
The virus can survive for up to three weeks outside the pig. Acute outbreaks of disease occur when virulent strains of the virus first infect an unvaccinated susceptible herd. The virus crosses the uterus and placenta and infects the foetuses.
The pig is the main host. Dogs and cattle may become infected, show nervous signs and die.
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