Common sense of African swine fever

African swine fever, as its name implies, is a deadly infectious disease, which was first discovered in Africa and harmed the pig industry.

It first appeared in Kenya 192 1 [1] in Africa. The disease is caused by African swine fever virus (ASFV), which can be transmitted by flight or port wastes, pork and its products, wild boar-borne virus and tick-borne virus [2].

The incubation period of African classical swine fever virus natural infection is generally 4- 19 days. Acute infected pigs usually show anorexia, high body temperature (up to 40-42℃), huddled up, rapid heartbeat, dyspnea, cyanosis and bleeding of the skin, occasional vomiting and diarrhea.

The virus mainly replicates in reticuloendothelial cells and mononuclear macrophages, causing apoptosis and seriously affecting the host's immune system [2-3]. He died within 7- 10 days after the clinical symptoms appeared, and the mortality rate could reach 100%.

2. What are the symptoms of African swine fever?

The incubation period of natural infection is 5-9 days, which is often short, while the clinical experimental infection is 2-5 days. At the onset, the body temperature rose to 465,438 0℃ for about four days. Until 48 hours before death, the body temperature began to drop. At the same time, clinical symptoms did not appear until the body temperature dropped. Therefore, it is different from the symptoms when the body temperature of classical swine fever rises. In the first three to four days of fever, the pig's appetite is extremely fragile, and the pig lies in bed. It is characterized by extreme fatigue, especially in the hind limbs, rapid pulse, cough, rapid breathing by about one third, obvious dyspnea, serous or mucinous purulent conjunctivitis, and some strains can cause bloody diarrhea, vomiting, and blood changes similar to classical swine fever. Three to five cases show that the number of white blood cells is reduced by 50% and the number of lymphocytes is also reduced. Leukemia occurs when the body temperature rises, and white blood cells are on the fourth day.

3. African swine fever

African Swine fever (ASF) is an acute, hemorrhagic and severe infectious disease caused by African Swine fever virus (ASFV), which infects domestic pigs and various wild boars (African wild boar, European wild boar, etc.). ).

The World Organization for Animal Health (OIE) listed it as a legally reported animal epidemic, and it is also a kind of animal epidemic that China focuses on preventing. It is characterized by a short onset process, with the mortality rate of the most acute and acute infection as high as 100%. The clinical manifestations are fever (up to 40~42℃), rapid heartbeat, dyspnea, partial cough, serous or mucinous purulent secretions in eyes and nose, cyanosis of skin, and obvious bleeding in lymph nodes, kidneys and gastrointestinal mucosa. The clinical symptoms of African swine fever are similar to those of swine fever, so we can only rely on it.

On August 3, 20 18, the first case of African swine fever was confirmed in China.

4. African swine fever

African Swine fever (ASF) is an acute, hemorrhagic and severe infectious disease caused by African Swine fever virus (ASFV), which infects domestic pigs and various wild boars (African wild boar, European wild boar, etc.). ).

The World Organization for Animal Health (OIE) listed it as a legally reported animal epidemic, and it is also a kind of animal epidemic that China focuses on preventing. It is characterized by a short onset process, with the mortality rate of the most acute and acute infection as high as 100%. The clinical manifestations are fever (up to 40~42℃), rapid heartbeat, dyspnea, partial cough, serous or mucinous purulent secretions in eyes and nose, cyanosis of skin, and obvious bleeding in lymph nodes, kidneys and gastrointestinal mucosa. The clinical symptoms of African swine fever are similar to those of swine fever, so we can only rely on it.

On August 3, 20 18, the first case of African swine fever was confirmed in China.

5. What do you mean by swine flu epidemic in Africa? What is the epidemic situation of African swine fever?

African swine fever is an acute, hot and highly contagious animal infectious disease caused by African swine fever virus. Pigs are mainly infected by contacting viruses or pollutants or being bitten by infected ticks, and the incubation period is 15 days.

The World Organization for Animal Health (OIE) listed it as a legally reported animal disease, and China listed African swine fever as an animal disease, which is a strong exotic disease. Its virulent strain has a high incidence rate on pigs, with a mortality rate of 65,438+0,000%. There is no specific medicine or vaccine, so once it is found, it must be culled and treated harmlessly. The Ministry of Agriculture and Rural Affairs pointed out that African swine fever is not a zoonotic disease, and the virus will not infect people.

Pig is the only natural host of African classical swine fever virus, and other animals are not infected with the virus except domestic pigs and wild boars. Although it is fatal to pigs, it is harmless to people and belongs to a typical pig-to-human virus.

Is pork safe to eat? At present, the epidemic situation of swine fever in Liaoning has been effectively controlled, and the local * * * has also blocked the epidemic area. Disinfection stations and sentries will be set up at the entrances and exits of each blocked area to ensure that the pigs and products in the blocked area cannot be transported out, so the pigs outside the affected area are still very safe. According to the relevant technicians of Liaoning Animal Husbandry and Veterinary Bureau, African swine fever does not spread between pigs, and the pathogenic virus will be inactivated at 60℃ 10 minutes.

Therefore, pork from regular channels can be safely eaten. .