(I) Incidence
Tian Tian had 104 pigs, of which 20 were sows, 3 were breeding boars, 62 were finishing pigs, and the rest were young pigs. On February 2, 2006, the pigs suddenly became ill. The incidence of piglets was high. Some pigs died. The symptoms were also severe. The second was the late sow and postpartum lactating sow. It was 65.4%, 8 deaths, and a mortality rate of 7.7%. Local veterinarians thought that pigs were suffering from colds and erythroderma. Intramuscular injections such as penicillin, penicillin, and blood worms were used for 3 days. They did not improve. Instead, some of the sick pigs died. The sows suffered miscarriage and stillbirth. .
After investigation, the pig farm was vaccinated against sows, boars and weaned piglets with a single dose of swine fever vaccine and piglets were vaccinated only once with swine fever vaccine. Sows were not injected with swine fever vaccine before mating. For gilts older than 6 months of age, first-born and sows and boars, Japanese encephalitis vaccine and parvovirus vaccine are inoculated once each year from March to May.
(b) Clinical symptoms
The main symptoms of sick pigs were cough, severe dyspnea, and gasping. The asthmatic sounds of sick pigs could be heard in the night, the pigs often had nasal discharge, and the visible mucous membranes were purple. Severely reduce or not eat. Pigs with severe onset of illness and pigs with severe symptoms are apathetic, erected, chilly and trembling. They are reluctant to move, and they like to squeeze a pile. They are cold and hoarse. The body temperature rises to 40°C to 41.5°C. The ear, limbs, and body skin become purple, and the finger pressure does not fade. Eat less or hunger strikes, cough and wheezing and breathing difficulties, open mouth breathing, foaming mouth and nose, often sitting in dogs, sick pigs died of suffocation.
(c) pathological changes
A total of 5 dead pigs were examined. The lesions were basically similar, and the whole body was bleeding from the serosa, mucosa, and parenchyma. The lymph nodes were swollen and bleeding, showing a dark red color. At the bottom of the stomach, there was bleeding from the mucous membranes of the stomach and bladder, and there were haemorrhoidal bleeding on the surface of the spleen and dark purple bleeding from the mung bean. There is a large point of bleeding on the kidney surface. Coronal fat, endocardial hemorrhage, lung enlargement, edema and emphysema in varying degrees. Symptomatic bronchial pneumonia lesions were found on the tip and heart of the two lungs, and the same lesions were present on the middle and lower lobes of the temporal lobe. The lesions are reddish, translucent, with clear boundaries, inflexible acupressure, and moist, dense sections that resemble fresh muscles.
(IV) Prevention and control
1. Strengthen feeding and management, use nutritious and comprehensive feed, and improve the disease resistance of pigs.
2. Isolate the sick pigs and bury the dead pigs and dead pigs. Thorough disinfection of the venues, utensils, housing and surrounding environment with Green Vespa disinfectant. Treatment of sick pigs: (1) Urgently inject the piglet serum with hyperimmune serum in an amount of 0.5 ml per kilogram body weight twice a day for 3 days. (2) Intramuscular injection of pneumococcal injection, 15 mg per kg of body weight; intramuscular injection of Paramyil injection, dosage of 0.2 ml per kg of body weight, twice daily, for 3 days. (3) Intramuscular injection of Houttuynia was used at a dose of 0.3 ml per kilogram of body weight twice a day for 3 days. (4) Add Baoshu red light to the whole group of pig feed, and mix 200 kg of material per 100 g for 5 days. At the same time if the whole group of pigs mixed with Chinese medicine better. Formula: almonds, fructus, honeysuckle, earthworm, melon wilt each 50 grams, Daqingye, Yinhua, medlar, Polygala each 40 grams, basil, Aristolochia, licorice each 30 grams, a total of fine At the end, add a small amount of honey as a reference; Addition amount: Pigs within 10kg, 20g each time, 10-25kg of pigs, 30g each time, 25-50kg of pigs, 50g each time, 50kg or more The pigs, 75 grams each time; mixed feed into the feed; 2 times a day for 3 to 5 days.
3. For all presumed healthy pigs in the farm, take the immunization dose for emergency immunization. All the pigs in size should be vaccinated with 5 doses of swine fever vaccine. Veterinary sows were vaccinated once more with 5 doses of swine fever vaccine 2 weeks prior to breeding.
(e) Suggestions
1. In order to effectively control the occurrence of swine fever, it is necessary to increase the immunization dose when inoculating the swine fever vaccine, and strengthen the immunization with the swine fever vaccine of 5 heads for 20 to 30 days after the first immunization. Sows were immunized 1 swine fever vaccine before mating. The boar is immunized once every six months. The treatment of swine pneumonia must be treated with specific drugs. Mycoplasma pneumoniae (mycoplasma) is not sensitive to penicillin, streptomycin and sulfa drugs. Therefore, it is necessary to use drugs that are sensitive to the disease to receive good treatment. Effect.
2, Houttuynia has a strong antibacterial effect for the lung infection effect is significant, so in the treatment of this disease with Houttuynia and other detoxification, cough and phlegm and Chinese medicine treatment of asthma, the effect is more ideal.
3. After treatment and rehabilitation of the affected sows, all of them are treated with Baoshu red light for 1 to 2 courses. Those who do not have the disease are eligible for breeding and are often thoroughly disinfected to establish a breeding farm without pathogens.
4, strengthen feeding and management. Do a good job in environmental sanitation within the housing, feed with the diversification of raw materials, increase multi-vitamins, improve the body's resistance to disease, do a good job of epidemic prevention and disease prevention is the key to prevent this disease.
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