Symptoms of Classical Swine Fever and the Three Main Differences from African Swine Fever

Since the outbreak of African swine fever, many regions in our country have been carrying out prevention and control, but up to now, the number of epidemic cases has still reached more than 70, which shows how severe the disease is and makes people extremely frightened. Many consumers have also said they will no longer eat meat. So what are the symptoms of swine fever? And what is the difference from African swine fever?

1. What are the symptoms of swine fever?

The symptoms of swine fever are generally divided into four types: mild type, chronic type, acute type and peracute type. The symptoms shown by each type are different. The specific symptoms of each type are as follows:

1. Symptoms of mild-type swine fever in pigs: necrosis and congestion appear on the abdomen, tail, ears and other areas of the pig, but there are no bleeding points. The body temperature is generally 40 to 41 degrees, and it mostly occurs in piglets.

2. Symptoms of chronic-type swine fever in pigs: poor appetite, listlessness, unsteady walking, body temperature fluctuating between high and low, and many purple spots appearing all over the body. If it is a young pig, constipation and diarrhea will occur. After a few weeks, the body temperature will rise again until death. If it does not die, chronic bleeding, cecum or colon necrosis and other runt pig phenomena will also occur. It mostly occurs in piglets.

3. Symptoms of acute-type swine fever in pigs: dull expression, unwillingness to drink water or eat, fear of cold, especially almost no strength when moving, and a preference for lying down. When the temperature rises to 40 to 42 degrees, the pig will stop eating and will have constipation and diarrhea. At the same time, bleeding will occur on the limbs, ears, underbelly and other parts of the body. If it is a sow, miscarriage is very likely, and 70% will die from the disease. If it is a suckling piglet, phenomena such as convulsions and circling will occur, so prevention and control must be carried out in time.

4. Symptoms of peracute swine fever in pigs: blood spots and blood patches appear all over the body, and the appearance looks like a turkey. At the same time, bleeding and edema will occur in the lymph nodes, mostly characterized by multiple hemorrhages.

The above is a detailed introduction to the various symptoms of mild-type, chronic-type, acute-type and peracute-type swine fever. We hope it is helpful to everyone.

2. What is the difference between swine fever and African swine fever?

Difference 1. Different modes of transmission: swine fever infects only through contact and under certain conditions. It generally occurs only in small-scale farms in our country. Most importantly, under natural conditions, it is transmitted only to pigs. African swine fever, in addition to being transmitted after contact, can also be spread through pests and insects. The most common is transmission by soft ticks. It is not only highly infectious, but can also transmit the virus to other pigs or other poultry.

Difference 2. Different disease symptoms: when swine fever occurs, the symptoms vary. Some pigs have poor appetite, listlessness and elevated body temperature, while others cannot walk, breathe faster, and have dry, foul-smelling feces. When African swine fever occurs, the temperature rises sharply, reaching about 42 degrees, and the body temperature will gradually decline only in the week before death. In addition, phenomena such as stopping eating, rapid breathing, unsteady walking and premature birth in pregnant pigs will occur, and the mortality rate is as high as 100%.

Difference 3. Different prevention and control methods: swine fever can be prevented and controlled by mixing prevention and control agents evenly with feed and then feeding it, and generally about two weeks later the swine fever will be effectively controlled. Injection solutions can also be used for prevention and control. African swine fever cannot be prevented or controlled with drugs or vaccines. Generally, the only option is to cull and deeply bury the pig herd. At the same time, after swine fever occurs, it is necessary to promptly report to the relevant departments for harmless treatment.

3. How is swine fever treated?

1. Strengthen management: during breeding, the pig house must be kept clean, and disinfection should be carried out according to plan. If introducing breeding stock, it is best to introduce them from disease-free areas, and promptly supplement vaccinations. After isolation and quarantine for 2 to 3 weeks, they can be merged into the herd.

2. Disinfect frequently: strictly disinfect the pig house, manure water, leftover feed and all other items used by pigs. Suspected diseased pigs should be strictly isolated or culled.

3. Preventive vaccination: regularly supplement vaccinations for pigs, generally once a year. For 20-day-old and 65-day-old piglets, vaccinate twice a year. Timely immunization gives better results.

The above is a detailed introduction to the symptoms of swine fever. If suspected diseased pigs are found, remedial measures should be taken in time, and severe cases should be isolated or culled in time.