Pre-symptoms of African classical swine fever

We all know that African classical swine fever is an acute, hemorrhagic and severe infectious disease. Once African classical swine fever occurs in farms, the loss is very great, so what are the early symptoms of African classical swine fever?

I. Prophase symptoms of African classical swine fever

1. The body temperature rises to 41 ℃, lasting for about 4 days, and the body temperature does not begin to drop until 48 hours before death.

2. Pigs have a loss of appetite, or even no appetite, which is very fragile.

3. The pig no longer moves and lies in the corner. If the pig is forced to move around, it will show extreme fatigue, cough, difficulty breathing and so on.

4. obvious purple spots appeared in the abdomen, armpit, ear, nose, tail and other parts of the pig.

What is the pathogenesis of African classical swine fever?

African classical swine fever is caused by African classical swine fever virus (ASFV). ASFV can enter pigs through the mouth and upper respiratory system, and then infect the nasopharynx and tonsils.

After swine nasopharynx and tonsils are infected with ASFV, the virus will quickly spread to the mandibular lymph nodes, and then spread throughout the body through lymph and blood.

The incidence of African classical swine fever is generally between 40% and 85%, and the mortality varies according to the strains infected. If it is a highly pathogenic strain, the mortality rate is as high as 90-100%.

Will it be fatal to eat African swine fever pork?

Because the African classical swine fever virus actually infects pigs but not humans, the virus does not have a direct impact on humans, and studies have shown that it is unlikely to mutate to humans. Therefore, as long as it is cooked at high temperature of African swine fever pork, people will not die if they eat it. But because it is a sick pig, it is better not to eat it.