There are many kinds of diseases that often occur in pig breeding, and respiratory diseases are one of them, but the harm is very big. If the prevention and treatment is not in place, the diseased pigs will become more serious and eventually die. Follow the small series to see the respiratory diseases of pigs. Comprehensive prevention skills.
1 Cause of the disease
The pathogens causing the disease include viruses, bacteria, mycoplasma, actinomycetes, and parasites. From the perspective of mechanism of action, pathogens mostly destroy lungs, respiratory tracts, and trigger immunosuppression. Common blue ear virus, circovirus, influenza virus, Mycoplasma pneumoniae, Streptococcus, Pasteurella multocida, Actinobacillus pleuropneumoniae and Toxoplasma gondii. In most cases, the disease is mainly mixed infection, and two or more pathogens can be isolated from the diseased pigs, sometimes even 4 to 5 species. Blue ear virus and circovirus are the most common clinical, and blue ear virus can cause damage to the whole body lymphatic system, especially lung macrophages, leading to severe immunosuppression. The circovirus can significantly destroy the lymphocytes in the spleen and lymph nodes, causing the number of lymphocytes in the body fluid to decrease, the rate of antibody production to slow down, and the inhibition of infecting pathogens or in vivo pathogenic bacteria to be weakened, and it is easy to secondary infection. . The data indicate that most cases of multi-infected porcine respiratory disease syndrome can be isolated from blue ear virus or circovirus.
2 clinical manifestations
The incubation period of this disease varies, depending on the type of pathogen and the level of feeding management, but it varies from 2 to 15 days, and some can last for more than 30 days. Sick pigs mainly show cough, wheezing, difficulty in breathing, increased secretion of nasal mucosa, frequent outflow of liquid in the nostrils, dryness of the nose plate, and deepening of the respiratory rate. The pigs with this disease have a loud breathing sound at night. With the development of the disease, the body temperature of the sick pigs rises, the feed intake decreases, the gasps are thick, the cough is aggravated, and sometimes the bloody secretions can be coughed up. The trachea becomes narrower, the secretion is enhanced, and a large amount of foam is present.
If the sick pig is not treated in time, the disease will enter the middle and late stages, showing the symptoms of lobar pneumonia, pleural inflammation and adhesion to the internal thoracic cavity. Auscultation may have adhesion sounds, pericardial and pleural effusions, and water sounds. Some pigs have a dog sitting posture. When lying down, the abdominal breathing is severe and they scream. The body may have metabolic disorders due to hypoxia, visible mucous membranes, cold ear tips, hi lying, not moving, some pigs will have diarrhea later in the disease.
3 prevention
Vaccination is preferred for the prevention of this disease. In general, the viral pathogens, bacterial pathogens and mycoplasma that cause the disease have corresponding commercial vaccines, but not all vaccines can play a 100% prevention and control role. The reason is related to some serotypes of some pathogens. Commercially available vaccine strains are usually clinically common strains. When the pig farms infect different serotype strains, the immune antibodies of the original vaccines will not play a role and cause infection. In addition, parasitic Insect diseases are usually free of vaccines. In view of this, clinically, even if the immunized pigs are still not taken lightly, it is necessary to strengthen the disinfection management, especially the disinfection of the house environment, no less than 2 times a week, the feces must be cleaned once a day, the work clothes insist on special purpose, foreign Personnel and vehicles must be strictly sterilized before being allowed to enter the production area. Establish a breeding concept of “greater than prevention, prevention is greater than cureâ€, and minimize the incidence of respiratory diseases in pigs.
4 treatment
Because respiratory syndrome is mostly mixed infection, it is necessary to use a combination of drugs. The combination usually considers three principles, one is the combined use of different antibiotics, the other is the combination of Chinese and Western medicine, and the last one is the combination of symptomatic and antagonistic treatment.
The combined use of different antibiotics is mainly for mixed infections caused by different pathogens, and is more suitable for the prevention and care of diseases and the treatment of early and middle stages of infection. When using, it is necessary to consider the contraindications of the drugs. The different kinds of drugs may have synergistic, additive or synergistic effects after the combined application. In addition, the medicinal properties and functional groups are different, and the water is dissolved in the drinking water. Sex, solution p H value, tolerance to hard water, etc. are all different, and it is necessary to ensure that the drug effect is scientifically used under the premise of synergy or addition.
The combination of Chinese and Western medicine is more suitable for the treatment of early and middle stages of the disease. Clinically, more individual treatments are available, and the treatment of mass-borne diseases can also be used. Traditional Chinese medicine mainly has the function of conditioning the body. The active ingredients such as volatile oil, saponin, flavonoids, organic acids, polysaccharides, etc. also have the functions of direct anti-virus, anti-bacterial and insecticidal functions, and have the characteristics of no drug residue, western medicine. Mainly for the disease medication. The combination of Chinese and Western medicine can reduce the use of western medicine, which is conducive to food safety. At the same time, traditional Chinese medicine can help the body to recover righteousness, which can quickly improve clinical symptoms and shorten the treatment cycle.
The combination of cause and symptomatic drug is mostly used for the treatment of the late stage of the disease. As the disease progresses to the later stage, the animal's body has been seriously degraded, and the organ has many organic lesions, and the metabolism of the body has also dropped to a low level, which is easy to die. Symptomatic treatment helps restore the body's physiological function, thereby improving the cure rate. For example, in piglets, the piglets are dehydrated seriously. If only the pathogenic Escherichia coli can be killed after oral administration of antibiotics, if the intestinal function cannot be recovered quickly, the mucous membrane will not be repaired in time, and the piglets will eventually dehydrate. To die, it must be treated with antispasmodic and mucosal repair drugs to reduce production losses.
Porcine respiratory disease is a disease that seriously affects the growth of pigs. In severe cases, pigs will die. Therefore, you must pay attention to prevention in advance during the breeding process. The above are the prevention methods and prevention measures for respiratory diseases in pigs. I hope to help pig farmers.
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