Recently, we have communicated with multiple suspicious clients and finally confirmed that improper testing operations caused the spread of the virus.
1. Infectious sources of African swine fever
Infected pigs, latent detoxification pigs, blunt edged ticks, bovine mosquitoes, etc. are mainly diseased pigs and latent period pigs in China. Pigs in the latent period are often seriously overlooked.
2. Common detection methods for African swine fever in current pig farms
3. Reasons for easy transmission during clinical testing
Airborne transmission: mainly in the form of aerosols. This is related to the ventilation settings of the pig farm. For example, pig saliva sprays into the air to form aerosols, which spread with the ventilation flow of the pigsty.
Direct contact transmission: Contact transmission between infected pigs or detoxified pigs during the incubation period. In clinical practice, especially for pigs undergoing detoxification during the latent period, this is difficult to detect.
For example, if one pig in a column has a hair disease, it has been detoxifying to the environment for four days, so other pigs in the same column are likely to be infected. These pigs in the same column may be latent period pigs. In addition, our pig farm is located in an epidemic area, and it is also possible for the pigs to carry the virus inside the farm.
For example, when selecting pigs for testing in a pigsty, due to pig bites, panic, etc., the pigs run wildly, pile up, and crowd in the pigsty. If there are latent detoxifying pigs in the pigsty, they will spread non plague viruses through direct contact.
Indirect transmission: Transmission caused by pigs coming into contact with infectious sources such as excrement (saliva, nasal fluid) or secretions contaminated with transmission media (feed, testing personnel, etc.).
At this point, if the pig is in a latent detoxification period, the testing personnel may become a vector for transmission, carrying the virus to other pigs being tested.
So clinical practice must be scientifically operated to avoid the spread of diseases.
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