Pityiasis rosea of ​​swine is characterized by light red pimples on the skin, high incidence and low mortality, mostly occurring in lactating piglets, rarely seen before 10 days of age, each litter l~2 Hair disease, or most cases, the general incidence rate is about 50%. The disease has been reported in many countries.
[genetic characteristics]
The cause of the disease is not yet clear, but it is related to heredity. Sick pigs often have a distinct familial nature, often traceable to the relationship between hemorrhagic diseases. German scholars conducted extensive investigations of the disease in 1963 and found that 18 litters were found in 28 litters of inbred pigs, but none of the 90 litters of the same breed but different strains. Hybridization tests between 12 boars and 30 sows showed that when both males and females were sick pigs, 52% of the piglets were born; only one of the pigs was sick, only 24% of the piglets were born; Department of ancestors has a history of onset, then there are 7% of the offspring; when there is no history of the family, all offspring are not affected. The genetic type of the disease has not been determined.
ã€Clinical symptoms】
Skin lesions occur mostly in the abdomen and nipples, and severe cases also spread throughout the body. The beginning is a small light red bulge, which later grows into a ring-shaped erythema of 1~2cm in diameter, with obvious edges, and the center is covered with thin, dry brown loose scales, sometimes inlaid and fused into flakes, and the diseased pigs are stagnant and digested. Disorder, anorexia. Diarrhea and vomiting.
ã€diagnosis】
The symptoms of lesion damage in this disease are similar to those of Qianqi, but fungal examinations and other bacteriological examinations are negative.
ã€Prevention】
The disease usually self-healing after 4 to 8 weeks, no need to treat, but should pay attention to skin hygiene and prevent secondary infection. More serious, 5% salicylic acid ointment or paraffin oil containing iodine can moisturize the affected skin, intramuscular injection of dexamethasone and vitamin C.
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