What is the route of transmission of classical swine fever?

Classical swine fever, commonly known as "intestinal rotting fever", only infects pigs under natural conditions. Pigs of different ages, genders, breeds and wild boars are susceptible and can occur all year round. What are the routes of transmission of classical swine fever? How to prevent it? What are the symptoms?

What are the routes of transmission of classical swine fever?

Classical swine fever is mainly transmitted through contact, such as contact with diseased pigs, wild boars, vector insects, eating virus-contaminated feed, swill and drinking water. In addition, sows infected with diseased and attenuated strains can also infect the fetus vertically through the placenta.

How to prevent classical swine fever?

1. Vaccination.

two。 Immune surveillance was carried out, and immune antibody monitoring was carried out by enzyme-linked immunosorbent assay or positive indirect hemagglutination test.

3. Timely elimination of recessive infected breeder pigs.

4. Adhere to the self-breeding, all-in-all-out feeding and management system.

5. Do a good job in the isolation, hygiene, disinfection and insecticidal work of pig farms and pig houses to reduce the invasion of classical swine fever virus.

What are the symptoms of classical swine fever?

The incubation period is related to the virulence of the virus and the resistance of pigs, generally 5-6 days, the shortest 2 days, and some as long as 21 days, generally divided into the most acute, acute and chronic according to the course of the disease.

1. The most acute type is rare, with sudden onset in pigs, mainly characterized by high fever, loss of appetite, mucosal hyperemia, weakness, and soon death.

two。 Acute type was the most common, and the body temperature of diseased pigs increased to 40.5-42 ℃. Sick pigs are mentally tired, rough-haired, shivering, like lying, walking slowly and powerless, loss of appetite, increased drinking water, vomiting, initial constipation, post-diarrhea, malodorous and thin stool, red spots or erythema of different sizes appear behind the ears, abdomen and inner limbs of sick pigs, inflammation of boar foreskin, neurological symptoms of piglets.

3. Most of the chronic type changes from acute diseased pigs. Loss of appetite, constipation and diarrhea occur alternately. Sick pigs are emaciated, mentally tired, weak hindquarters, stumble, and finally die of exhaustion.

Classical swine fever is a highly contagious disease in pigs, so pig farmers must vaccinate pigs before breeding.