Simulation-based estimation of BSE infection in Japan

Preventive Veterinary Medicine
Takehisa YamamotoSota Kobayashi

Abstract

The first case of bovine spongiform encephalopathy (BSE) in Japan was found in September 2001. As a result, national BSE surveillance systems in slaughterhouses and farms were introduced between October 2001 and April 2004. All cattle, with the exception of those under 24 months of age that die at farms, now undergo compulsory testing when they die or are slaughtered. The removal of specified risk material (SRM) from all slaughtered cattle and a ban on the feeding of meat-and-bone meal to all farm animals were implemented in October 2001. However, infected cattle that died or were slaughtered before these measures were put into practice could have been a source of infection to other cattle through the rendering process. The slaughtered cattle could also have been a source of infection to humans via SRM that entered the food chain. The purpose of this study was to estimate the number of BSE-infected cattle that could have been a source of infection to cattle and humans before October 2001. Since all typical cases were dairy cattle, this study focused on the dairy cattle population. We developed a simulation model to obtain the year of death and the final disposition of infected cows born in each year from 1996 to 2001. In this m...Continue Reading

References

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Citations

May 31, 2012·Risk Analysis : an Official Publication of the Society for Risk Analysis·M KadohiraA de Koeijer
Jul 15, 2015·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·Mustafa Al-ZoughoolDaniel Krewski
Aug 25, 2016·Journal of Toxicology and Environmental Health. Part a·Tamer OrabyDaniel Krewski

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