The clinical picture of a smallpox-like generalized infection in a gorilla which became sick on the 14th day fter its arrival at the Moscow Zoo is described. The causative agent of the disease was isolated and found to be a virus of the herpes group with properties resembling those of varicella-zoster virus. The evidence presented calls for a careful attitude toward reports on the pox nature of vesicular diseases in monkeys in cases which have not been confirmed virologically.
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Marennikova et al. (1973) studied this question.