Porcine "erythema" is an immunosuppressive skin disease that is very common in summer. Clinically, the main manifestations are the number of pink or red-purple spots of different sizes and sizes in different parts of the body, which have the characteristics of high incidence, long course, low mortality and reduced feed conversion rate.

Causes

Pig "erythema" is a comprehensive skin disease caused by a combination of multiple causes, mainly in the following aspects:

Immunosuppressive disease is the main cause

In many infectious diseases of pigs, there are many immunosuppressive diseases, and the harm to the body is also very large. The immunosuppressive diseases that play a major role in the "erythema" of pigs are mainly porcine dermatitis caused by porcine circovirus. Nephrotic syndrome (PDNS), "insect immunity" of pig toxoplasma, chronic swine fever and chronic swine erythropoiesis.

Extracorporeal parasites and infections of surface bacteria

The summer weather is very hot and the sanitation is not easy to control. If the disinfection is not strict, the management of the breeding is unscientific, it will cause a large number of surface bacteria and ectoparasites to breed, coupled with the mechanical transmission of mosquitoes, flies, dirty syringes, etc., skin diseases will occur in large numbers.

Allergic corticitis

Due to the bite of mosquitoes and the stimulation of toxins secreted by surface bacteria, pink patches appear on the skin, showing allergic or spilled dermatitis and toxin dermatitis.

Diagnostic points

On the surface of the affected pig, there are many scattered spots on the surface of the pink, red-purple, spotted papules, which first appear from the back buttocks, and as the disease progresses, the red spotted papules spread to different parts of the body, such as Shoulder, clip back, ears, abdomen, limbs, etc. In severe cases, the humps can cover all parts of the body.

The spotted papules on the skin of the sick pig begin to appear pink, with round or irregular ridges ranging from 2 mm to 6 mm in diameter. As the disease progresses, the "center" of the spotted papules will appear dark purple. And gradually spread and become larger, and merge into one another, and severe cases will gradually ulcerate. If the surrounding environment is not well controlled, it is often accompanied by phlegm, itching, exudative dermatitis, etc., and the sick pigs have symptoms such as rubbing walls and oily substances on the epidermis.

Sick pigs will have decreased feed intake, progressive weight loss, reduced feed conversion rate, thick fur, pale skin, and individual yellowing, fever, constipation or diarrhea.

In the end, the sick pigs died due to "nutrition incompleteness" or secondary diseases such as chronic haemophilus, chronic pleuropneumonia, erythroblastosis, streptococci, etc., and died.

Integrated prevention

For the prevention and treatment of this disease, there are many methods in the clinic, and also achieved good results. In light of the actual situation, it is briefly summarized from the following aspects:

Feeding management

Strengthen feeding management, minimize various stress factors, add Victorian in drinking water when the weather is hot, weaning, immunization, piglet castration, pigs turn, reduce stress, enhance the body's resistance, especially pay attention to feed Quality, vaccine immunization, temperature and humidity changes, etc.

Environmental sanitation

Strengthen environmental sanitation measures, alternate disinfection on a regular basis, and strengthen the pig farm environment and pig house disinfection and anti-mosquito work. Isolation of sick pigs away from healthy pigs for feeding and treatment. In addition, deworming health care work must also be cautious.

Drug control

(1) Add anti-virus I powder (2 bags / ton of feed) + Constant Ford (6 bags / ton of feed) + doxycycline (250ppm) + Houttuynia (use recommended dose) in the feed, mixed with Feed for 10 days to 15 days; at the same time do a good job of deworming the pigs, add Igan Erjing to the feed to control the occurrence of parasitic diseases. '

(2) Pigs with severe symptoms may recommend Hengfengqiang amoxicillin + Qingkailing injection + Houttuynia injection + vitamin C + dexamethasone, mixed intramuscular injection once a day for 3 consecutive days, sick Spots on the skin of pigs will gradually disappear, and secondary infections can be controlled by long-acting oxytetracycline and long-acting ceftiofur, which can effectively control the disease.