What is bovine lumpy dermatosis?
Bovine lumpy dermatosis is a subacute, acute or chronic infectious disease caused by pimple dermatosis virus infection. Bovine dermatosis was first discovered in Zambia, Africa in 1929. In 20 19, India saw the first case of the disease. This disease is caused by goat acne virus and is highly contagious. Infected cattle excrete virus infection according to the mouth and nasal cavity, and then spread around according to mosquito bites. Now they have seen 500 double-headed cows in New Delhi. The main clinical manifestations of the disease are fever, weight loss, lymphadenopathy, skin edema and some nodules or ulcers. I feel that the seven cows become thinner, the milk yield decreases, and the skin tension produces dents or perforations, which greatly reduces their actual value.
What harm does bovine massive dermatosis have to cattle?
The body temperature of sick cattle can rise above 40℃, which is a defective heat type and lasts for more than 7 days. The early manifestations are sinusitis and keratitis, mainly manifested in the discharge of sticky secretions from the eyes and nose, and can develop into conjunctivitis. The milk secretion is reduced. The skin on the surface of the body has hardness, annular protrusions, nodules with a pore size of 20 to 30mm or more, clear boundaries, and pain when touching. Generally speaking, nodules first appear in the head, head and neck, chest and limbs, and sometimes all over the body. In very serious cases, granulomatous inflammatory space-occupying lesions occur on the roots and cheeks. Skin nodules are located in epidermis and dermis, with different sizes, which can aggregate into irregular masses and eventually shrink completely, but hard skin lesions may last for months or even two years. Sometimes, skin necrosis will attract flies and insects, and eventually become a hard scab, leaving deep holes after falling off; It may also be secondary pyogenic bacterial infection with myiasis.
The superficial lymph nodes of sick cattle are swollen, especially the lymph nodes in front of the shoulder, outside the groin, front of the thigh, hind legs and ears, and the chest, chest, limbs and often swollen. The limbs are obviously swollen, which can reach 3 to 4 times. Mucosa in eyes, nose, mouth, colon, chest and organs will also produce nodules and fester rapidly. Severe infected cattle recover slowly, which may lead to primary or primary lung infection. Milk secreted by milk can produce mastitis. Pregnant cows are likely to miscarry. Calves are infertile within four to six weeks. If orchitis occurs, permanent infertility may occur.