Symptoms and Treatment Methods of Acute Classical Swine Fever in Pigs

Pig farming is one of the largest agricultural farming operations in our country, and during the breeding process, quite a few pigs contract classical swine fever. So what are the manifestations of acute classical swine fever in pigs? How should it be treated?

1. Basic information about classical swine fever

1. Overview of classical swine fever

Generally, classical swine fever is also called rotten intestine fever. It is mainly an acute, febrile, contact-transmitted infectious disease caused by the classical swine fever virus of the genus Pestivirus in the family Flaviviridae. This disease is highly contagious and fatal, and most importantly, classical swine fever occurs in all four seasons. When the disease breaks out, pigs of any age, sex, and breed are very susceptible to infection.

2. Epidemic characteristics and incubation period of classical swine fever

Classical swine fever is an acute, contact-transmitted infectious disease of pigs, but generally it poses no direct harm to humans. The main sources of infection for classical swine fever are sick pigs and dead pigs, but contaminated feed, drinking water, and other items can also transmit the virus, so special attention must be paid during breeding.

The incubation period of classical swine fever is generally 5-7 days. According to clinical symptoms, it can be divided into four types: peracute, acute, chronic, and mild.

2. What are the manifestations of acute classical swine fever in pigs?

To determine whether a pig has contracted acute classical swine fever, the first thing to look at is the symptoms. Generally, the manifestations of acute classical swine fever are:

1. The acute form of classical swine fever often has no obvious symptoms, and the pig dies suddenly. The sick pig's body temperature rises to 41-42°C, appetite decreases, it becomes depressed, the conjunctiva of the eyes and nasal mucosa become congested, and it is extremely weak. The course of the disease is 1-2 days, and the mortality rate is extremely high.

2. In addition to symptoms such as not eating, poor spirits, a preference for lying down, arched back, chills, and weakness, other typical symptoms of acute classical swine fever in pigs include inflammation of the conjunctiva with purulent discharge, and sometimes small pinpoint hemorrhages can be seen in the conjunctiva. The nasal mucosa becomes inflamed, with purulent discharge.

3. Generally, in the early stage of the disease, pigs will have constipation, and the feces will be black. In the later stage of the disease, diarrhea, foul odor, and mucus or blood in the feces will appear. On the nose tip, behind the ears, abdomen, inner sides of the limbs, and other areas with thin skin and sparse hair, purplish-red spots of varying sizes can be seen, which do not fade when pressed; boars may have posthitis, and when squeezed by hand, a foul, turbid liquid is ejected. The oral mucosa is unclean, pale or cyanotic, and there are bleeding spots on the inner surface of the lips, gums, and corners of the mouth.

4. Usually, piglets with acute classical swine fever have neurological symptoms. When stimulated by the outside world, they scream, fall to the ground, and convulse.

3. How should acute classical swine fever in pigs be treated?

1. Generally, if pigs contract acute classical swine fever, most of them will die suddenly without obvious symptoms, so upon discovering such a situation, first report it to the local epidemic prevention station, then blockade the epidemic area, and properly carry out harmless disposal of the dead sick pigs.

2. For other pigs, emergency preventive vaccination should be carried out, and the production sites, equipment, and pens in contaminated areas should be disinfected. Pig manure should also be piled up for fermentation and harmless disposal.

3. In fact, the best way to deal with classical swine fever is to do a good job of prevention in advance, that is, vaccinate against classical swine fever. The vaccines currently on the market mainly include classical swine fever live vaccine (I)———rabbit embryo vaccine, classical swine fever live vaccine (II)———cell vaccine, and classical swine fever live vaccine (I)———spleen and lymph vaccine.

The above is the full introduction by the Tuliu.com editor about acute classical swine fever. Pig farmers must do a good job of prevention before breeding. None of the vaccines that should be administered can be omitted, and the living areas, equipment, and other items for pigs must also be disinfected regularly.