is caused by Orthopox virus belonging to family Poxviridae. Orhtopox
viruses are antigenically similar.
Occurrence and Transmission:
Spread of this virus from animal to animal is by direct or indirect
contact: milker’s hands or infected milking teat cups. Similarly
infection travel from one herd to another by carrier or infected
animals. It is also transmitted by ticks, flies, and mites. It comes
from one herd to other by milkers and gwalas.