How to prevent and control swine high fever disease? Master these methods

　　 As the weather changes and winter arrives, a cold wind sounds the alarm of the bitter winter. People are urged to keep warm and resist the attack of the cold wind, but who can resist the infection of bacteria to our poultry? Now bacteria are increasingly rampant and troubling us. I think it should be related to our living habits. Below is a brief introduction to the symptoms and prevention and control of swine high fever disease:
Clinical symptoms
The sick pigs are listless, have reduced appetite or stop eating, and have a slight desire to drink. The sick pigs have persistent high fever, with body temperature of 41°C to 42°C, and individual cases reaching 43°C. There is skin flushing of varying degrees that fades under finger pressure, and the pigs are lethargic. The eyes have tear stains and increased secretions, showing symptoms of conjunctivitis, and there is severe abdominal breathing, rapid panting, cyanosis of the ears, and large purplish-red patches or bleeding spots on multiple parts of the body such as the limbs and abdomen, which do not fade when pressed by hand; in the later stage of the disease, yellow watery feces are passed, urine is scanty and turbid, dark yellow in color, and dying pigs show paddling-like neurological symptoms, and there is arthritis, making it difficult to stand, scanty and reddish-yellow urine, constipation, constipated feces in ball shapes, and lethargy. The superficial lymph nodes are swollen to varying degrees, some cases have rapid breathing, and the visible mucous membranes are flushed. As the course of the disease lengthens, the skin of the ears, lower neck, abdomen, limbs, and tail becomes purplish and does not fade when pressed. In individual cases, the body surface skin gradually changes from pale to yellow-stained, and eating and drinking desire is completely lost. Most cases last about 20 days, and eventually the pigs die from exhaustion.;
Pathological changes
Necropsy was performed on 3 dead pigs: the lungs were swollen, hemorrhagic, hardened, with marble-like brown mottled lesions, rubbery lungs that could not contract, obvious symptoms of interstitial pneumonia, and purulent foci, with the pulmonary interstitium obviously widened; the inguinal lymph nodes and hilar lymph nodes were enlarged and hemorrhagic; the kidneys were swollen, brittle, with pinpoint bleeding spots; the liver was swollen with degeneration and necrosis; splenic infarction; the intestinal mucosa was damaged and ulcerated; fibrinous adhesion between the pulmonary serosa and the pleura or pericardium.
Measures taken
Because the feed eaten by this batch of pigs was mainly leftover soup and rice from nearby factories and some green feed such as sweet potato vine seedlings, the farmer fed the leftover soup and rice directly to the pigs without reboiling, cooling, and then feeding, resulting in the pigs' gastrointestinal tract not being very good and their resistance not being very good either, making them very susceptible to infection by multiple diseases. Therefore, the farmer was first advised to boil the leftover soup and rice before feeding it to the pigs.
In view of the fact that this pig farm has already been infected with bacteria and viruses causing unidentified high fever syndrome, the key to preventing and controlling this disease is to adhere to the principle of prevention first. Therefore, the farmer is advised to consolidate disease prevention awareness, strengthen environmental isolation and disinfection work, and prevent the introduction of this disease. Keep the pig house clean and dry, spray and disinfect with 0.5% peracetic acid once a week, and spread lime powder around the pig house.
After sick pigs are found, first, for pig farms where high fever syndrome occurs and porcine reproductive and respiratory syndrome testing is positive, pigs must be promptly injected with attenuated porcine reproductive and respiratory syndrome vaccine; for farms and households where pigs have not had porcine reproductive and respiratory syndrome but are under greater threat from it, pigs should be injected with inactivated vaccine; the fluctuation of this disease in some areas is related to the discontinuation of porcine reproductive and respiratory syndrome vaccine; second, prevention of atypical swine fever must be strengthened, because in cases of "high fever syndrome," swine fever is an important cause of high mortality, so the effectiveness of swine fever immunization must be ensured; third, effective antibiotics should be selected to control secondary infection, and antibiotics can be selected through drug sensitivity testing; fourth, according to the different pathogens causing the disease (such as mycoplasma, toxoplasma, etc.), symptomatic drugs should be selected for preventive medication or treatment to reduce losses caused by the disease; fifth, some drugs that can increase pig immunity should be used for preventive medication or treatment, which has a certain effect; sixth, recovered breeding pigs should be culled in a timely manner, because generally when recovered breeding boars mate with sows, it often leads to low litter size and high abortion rate, and their utilization value is affected.


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