Neethling type is a true lumpy skin disease.
Allerton type is a false lumpy skin disease.
Etiology
This is not separate from sheep pox virus. It is identical to sheep pox virus. It is transmitted by flies. Although it is mild in indigenous cattle, it is severe in exotic cattle. Neethling type was first recognized in South Africa. It is now found to be a disease problem. It is also found in East Africa and Zaire. It has long incubation period of 2-4 weeks. Generally, it is a sporadic disease. Peracute form may kill the animal within 10 days without showing lesions. Lesions when they occur are generalized over the body.
Clinical signs include respiratory distress and pneumonia signs. In very severe case, fever occurs with depression, ocular and nasal discharges. Temperature may drop and shoot up again. Intra-dermal nodules vary in size from 1-5cm in diameter. They differ in size in different animals. There is lymphnode enlargement. The nodules are painful. Other signs are pain all over the body, necrosis of the nodules and sloughing off of the skin. Secondary bacterial infection may set in. in South Africa, attenuated vaccine is used to control the disease. In other parts of the world, no specific drugs are used for neethling type.
Allerton type is a simple disease caused by Herpes virus infection. There is a short incubation period. Skin nodules appear. More severely affected animals develop mild fever and it clears off in about 2 weeks.
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