流行性腮腺炎的病原是腮腺炎病毒,属RNA病毒的副粘病毒科。病毒颗粒呈园形,大小悬殊,为100~200 nm,核壳为螺旋对称,直径17 nm,螺距5 nm,有一中空部分,直径4~5 nm。有包膜,厚15~20 nm,表面有小的突起,含血凝素、血溶素和神经氨酸酶。病毒的感染性可被乙醚、氯仿、福尔马林、56℃ The origin of mumps is mumps virus, which belongs to RNA virus Paramyxoviridae. The virus particles are round in shape and vary in size from 100 to 200 nm. The core-shell is a spiral symmetry with a diameter of 17 nm and a pitch of 5 nm and a hollow part with a diameter of 4 to 5 nm. Encapsulated, thick 15 ~ 20 nm, the surface has small protrusions, including hemagglutinin, lysozyme and neuraminidase. The infectivity of the virus can be ether, chloroform, formalin, 56 ℃