Abstract
MANY captive gibbons are naturally exposed to infectious type-C virus based on the prevalence of animals with humoral antibodies reactive to the virus1,2 and isolation of virus from tissue of leukaemic3,4 and normal gibbons5. A closely related infectious type-C virus has also been isolated from a woolly monkey with a spontaneous fibrosarcoma6,7 which implies that a common virus could infect unrelated non-human primates. Several reports recently have identified infectious primate type-C virus8,9, viral components10 and humoral antibody reactive to this virus in leukaemic11 and normal humans12 suggesting that man also may be susceptible to infection by a related virus. In an attempt to identify a possible source for infectious primate type-C virus that might infect primates as well as other animals, we decided to investigate whether healthy captive gibbons were shedding viruss ince this non-human primate is frequently displayed at zoos or kept as pets. This report presents evidence that gibbons can have long term viraemia with type-C virus without detectable immune response. These viraemic animals actively shed infectious virus in urine and faeces.
Published Version
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