Several good ways to treat swine asthma!
2020-11-27
Porcine asthma, also known as Mycoplasma hyopneumoniae, is a chronic respiratory infectious disease of pigs. Now I will tell you how to treat swine asthma.
1. Pathology overview
Porcine asthma, also known as Mycoplasma hyopneumoniae, is a chronic respiratory infectious disease of pigs. The main symptoms are cough and wheezing.
The pathological changes are mainly located in the lungs in the thoracic cavity. Acute cases are mainly pulmonary edema and emphysema; subacute and chronic cases see "shrimp"-like consolidation in the lungs. The growth rate of affected pigs is slow, feed utilization is low, and fattening The feeding period is extended.
2. Disease harm
Mycoplasma hyopneumoniae is one of the main pathogens that cause respiratory diseases in pigs, and it mainly exists in the respiratory tract, lung tissue, hilar lymph nodes and mediastinal lymph nodes of infected pigs. Sick pigs and pigs with bacteria are the main sources of infection, and the main transmission routes are: respiratory transmission, direct contact transmission and droplet transmission.
The pathogenic bacteria only infect pigs; Mycoplasma hyopneumoniae exists on the surface of the trachea and bronchus in the early stage of infection, and damages the mucosal-ciliary barrier, causing the proliferation of bronchial and perivascular lymphoid cells;
The immune response of infected pigs to Mycoplasma hyopneumoniae mainly occurs 15-20 weeks after infection, which shows that this infection has a certain immunosuppressive effect.
3. Incidence and epidemic
There is no difference in species, age, and sex of the disease. It can occur throughout the year, and it is more common in cold, rainy, humid or sudden climate changes.
Poor feed quality, crowded, damp, and poorly ventilated pig houses are the main causes. The mortality rate is not high when infected alone, but once the pigs are introduced, it is difficult to completely remove them without strict measures.
In the case of natural infection, Pasteurella, pneumococcus, Actinobacillus pleuropneumoniae, Salmonella and various pyogenic bacteria, Mycoplasma hyorhinis and Chlamydia granulosa, etc. are prone to secondary, which will cause the disease to intensify and increase the mortality rate. .
4. Prevention measures
a. Keep the disease away from the outside: Insist on self-reproduction and self-raising, and strictly eliminate the introduction of foreign diseased pigs. If it is necessary to introduce, it must be strictly isolated and quarantine, and corresponding disinfection management must be done.
b. Management in-house: to ensure reasonable nutrition at all stages of the pig herd, avoid mold deterioration and deterioration of feed, control the small environment in conjunction with seasonal changes, strictly control the stocking density, implement an all-in and all-out system, and regularly alternate multiple chemical disinfectants disinfect.
c. Vaccine immunization: The vaccine must be injected into the chest cavity, and intramuscular injection is invalid. Note that 15 days before the injection of the vaccine and within two months after the injection of the vaccine, do not feed or inject drugs that inhibit the vaccine, such as oxytetracycline or kanamycin.
d. Cooperating drugs: Mycoplasma hyopneumoniae can change the surface antigen and cause immune escape, leading to weakened immunity.
Therefore, pig farms need to cooperate with drug control. A course of treatment is generally 3-5 days, especially when pregnant sows are mixed with feed purification. The piglets produced by them are raised separately and are not kept for breeding. The pig farms with conditions should implement early isolation and weaning to minimize The contact time between the sow and the piglet, while paying attention to drug prevention and purification.
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