African swine fever (ASF) is an acute, potent and highly contagious disease caused by African swine fever virus (ASFV), which seriously harms the global pig industry.
It does not pose a threat to human health. However, China is the world's largest producer and consumer of pork. Pork is also the most important meat consumer in China. It plays a pivotal role in improving people's quality of life. If the large-scale morbidity of pigs is inevitable, it will cause serious economic losses. And social troubles. Because African piglets have serious cross-border transmission ability and harmfulness, and there is no effective vaccine prevention for this disease, culling pigs in infected areas is the most effective prevention and control measure to prevent the spread of African swine fever virus.
African swine fever was first discovered in Kenya in Africa in 1921, introduced to Western Europe in 1957, and introduced to South America and Central America in 1971. The epidemic was relatively stable for some time. In 2007, African swine fever was introduced into the Caucasus, outbreaks, spreads and epidemics in several countries in Eastern Europe and Russia. At present, it is ravaging Poland, Ukraine, Hungary, Romania, Russia and other countries. In particular, in March 2017, the African swine fever epidemic occurred in the Russian state of Irkutsk. The place is located in Eastern Siberia, only 1000 km away from China. This is the first time that the African swine fever has occurred in the Far East. Since then, the situation in China's surrounding epidemics has become increasingly severe. In the Russian Far East, Omsk Region, Krasnoyarsk Territory, and Tyumen, there have been African swine fever epidemics, and only 16,868 pigs have been destroyed in Tyumen. It has caused heavy losses to the Russian pig industry.
The results of gene sequencing showed that the strain of this outbreak in China was gene type II, and the viral gene sequence was completely consistent with the corresponding sequence of Georgia 2007 strain.
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