Swine fever is a common problem in raising pigs. With the change of breeding environment, the incidence of swine fever is also new. It is manifested as: multiple newborn piglets, atypical and reproductive-disabled swine fever, mixed infection, serious immune failure. . The quality of piglet control is an important measure of whether a pig farm is stable or not. It is essential to comprehensively control pigs and pigs.
First, the clinical symptoms of swine fever
Hog Cholera is a highly contagious viral disease. Typical acute swine fever is characterized by high fever, depression, bleeding, high morbidity and high mortality. The swine fever virus can infect all breeds of pigs of all ages. Early symptoms are elevated body temperature, hair dull, hi lying, loss of appetite, body temperature can be as high as 41-42 ° C, conjunctivitis, chills, diarrhea, constipation, diarrhea, abdominal subcutaneous, nose, ear tip, inner limbs can appear Purple bleeding spots, finger pressure does not fade.
Second, the new characteristics of swine fever
1, newborn piglets more frequent
At present, piglets often occur in newborn piglets, and the age of onset is small. Adult pigs rarely have symptoms, and there is a serious poisoning phenomenon. The long-term poisoning can last up to 750 days, which can cause horizontal spread, vertical transmission, and cause a vicious circle.
2, atypical and reproductive disorders
Clinically, there are persistent infections (subclinical infections) and latent infections of swine fever virus, and cases of pregnant sows with toxic syndrome (hyper-reproductive dysentery) are prominent. Pigs are often healthy and are the most dangerous infections causing swine fever. Sources should be eliminated in time.
Mixed infection is serious
Mixed infections with blue ear, pig pseudorabies, small, ring virus disease, etc. are very serious and widespread.
Immune failure is serious
Although pig farms attach great importance to swine fever immunization, more than 80% of the herds have been injected with rabbit attenuated vaccines, but the herd immunity is low. Sustained infection of sows and placental infection in piglets are important causes of immune failure. Most of the piglets produced by this sow are innate immune-tolerant pigs, resulting in a vicious cycle of swine fever.
Subclinical infection of swine fever - placental infection - sow reproductive failure - piglets with poison - gilts - subclinical infection, with a toxicity rate of 3% -33%.
Third, comprehensive prevention and control measures
1. Prevention and control measures:
Vaccine immunization. It is recommended that the pigs will be pre-immunized in the high-infection field, and the colostrum will be taken 1 hour after the super-immunization. Choose a reliable vaccine to ensure that immunization is in place. Develop a blood collection plan for immune surveillance and continuously optimize the immunization program.
2, the incidence of treatment measures:
We know that there is no immediate treatment for viral infections, only supportive care can be used. More important is to prevent secondary infections, reduce losses, and take appropriate preventive measures to ensure that no disease. For bacterial infections, timely use of antibiotics can kill pathogenic bacteria and achieve good therapeutic results. Therefore, for the pig farms with serious swine fever, we recommend:
1 circle of injection of "doxycycline" and "spectamycin" plus appropriate dilution of water spray, once every 30 minutes.
2 In severely ill pigs, intramuscular injection of “cefotaxime†20-30 mg/kg and “florfenicol†injections were used for one day.
3 Add “Ding Zhukang†250-500g+ “Vidokang†400-600g+ “glucose†10kg/t.
4 After doing a good job in environmental sanitation, use “Ding Fluoroaldehyde†disinfection housing, twice a day.
5 Adjust the swine fever immunization program: Use the commercially available evaluation of the swine fever vaccine to make the super-free of the newborn piglets.
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