What are the common diseases of raising pigs in summer and how to prevent them?

Due to the high temperature and humidity in summer, many viral diseases, bacterial diseases and parasitic diseases in pigs are easy to occur and spread, which pose a great threat to the pig industry. In addition to swine fever, swine flu, piglet paratyphoid, haemophilus and diarrhea, streptococcosis, eperythrozoonosis and toxoplasmosis are also prevalent in summer, which must be paid great attention by pig farmers.

The reasons for this:

Improper feeding and management for pigs raised in open or semi-open pig houses, overheated ambient temperature can easily cause stress and disrupt the normal metabolism of the body. In closed pig houses, harmful gases often exceed the standard seriously due to poor ventilation. If the humidity is high, it is conducive to the reproduction of pathogenic microorganisms and create conditions for the occurrence of the epidemic disease.

Poor feed quality, such as feeding moldy and deteriorated feed, will make a variety of pathogenic microorganisms take advantage of the deficiency. High temperature, high humidity and drastic changes in the weather are conducive to the breeding and reproduction of pathogens and become an important inducement of the epidemic of pig diseases in summer, and some of these diseases are induced and secondary infection after the decrease of body resistance when catching a cold. In summer, blood-sucking insects such as mosquitoes, flies, midges and other blood-sucking insects promote the occurrence of swine plague and it is a very common phenomenon that pig houses in rural areas are not covered with gauze to prevent mosquitoes, flies and midges.

The temperature is high, the humidity is high, and the weather changes quickly. These factors are beneficial to the breeding and reproduction of pathogens and become an important inducement of swine disease epidemic in summer.

Mosquitoes, flies, midges and other insects promote the occurrence and epidemic of swine blight in summer. It is a very common phenomenon that rural pig houses are not covered with gauze to prevent mosquitoes, flies and midges.

Streptococcus suis is often secondary to a cold and fever in pigs. The body temperature of acute diseased pigs rose to more than 41 ℃, reduced or stopped eating, conjunctival flushing and runny nose. Some sick pigs have symptoms such as arthritis, lameness, crawling or inability to stand. Piglets within 8 weeks of age often die within two days. Chronic pigs often have round light rose coin papules on the head, chest, abdomen and thigh skin, which are covered with brown crusts. When mixed infection of classical swine fever, swine serous rhinorrhea, ear tip, ventral, extremities, medial thigh with purple or blue bleeding spots, bleeding spots. Diseased boars can see urine accumulation in the prepuce, squeezing out white, turbid, foul-smelling liquid. The diseased pigs appeared alternately after constipation and diarrhea, had difficulty breathing in the later stage, and often died in 1 ~ 3 days.

In recent years, the pathogen of the disease has developed resistance to a variety of antibiotics, which increases the difficulty of clinical treatment. However, if strong amoxicillin (15 mg / kg body weight) and 2.5% enrofloxacin injection (2.5 mg / kg body weight) are injected intramuscularly, once a day for 3 days, the disease will be effectively controlled. When co-infected with classical swine fever, the whole population should be urgently vaccinated with attenuated classical swine fever vaccine.

The typical clinical symptoms of porcine eperythrozoonosis are decreased production performance of sows, poor physique of piglets, anemia and increased intestinal and respiratory tract infections. At the beginning of fattening pig disease, the spirit was depressed, and the body temperature rose to 39.5 ℃ ~ 42 ℃, trembling in circles or unwilling to stand, lying away from the group, constipation or diarrhea. Diseased pig ear, neck, chest, abdomen, limbs and other parts of the skin red and purple, finger pressure does not fade, become a "red pig". Although there are many drugs to treat this disease, there are not many drugs that are really effective. Xuechongjing, imidazophenylurea, arsine and tetracycline and oxytetracycline can be selected for treatment.

The clinical manifestation of porcine toxoplasmosis is like influenza, the body temperature rises to 40.5 ℃ ~ 42 ℃, missed heat, showing dyspnea, abdominal breathing, cough, runny nose, limb and whole body muscle pain, stiffness, red and purple on the inside of the limbs and subcutaneous area of the abdomen. The enlarged lymph nodes on the body surface are effectively treated with sulfonamides such as sulfamethoxine, sulfadiazine and trimethoprim.

Comprehensive prevention and control measures should first strengthen feeding and management, pay attention to summer heat prevention and cooling, do a good job in environmental hygiene, and disinfect the environment and appliances regularly. Secondly, attention should be paid to the elimination of blood-sucking insects. In addition to killing with drugs, gauze can be installed in pig houses, which can effectively prevent the bites of mosquitoes, flies and midges and reduce the occurrence and spread of epidemic diseases. Third, after the disease of pigs, we should find out the cause in time, treat them as soon as possible, and bury or incinerate the dead pigs.