Long‐Term Seroprevalence and Molecular Surveillance of Hepatitis E Virus in <i>Macaca</i> spp. at a Russian Primate Research Center

A latent epizootic of HEV-4 infection was presumably due to the waterborne transmission of the virus that was initially introduced into the primate center with monkeys imported from Vietnam. Regular testing of quarantined animals for markers of HEV infection, as well as the elimination of a single flow-through drinking water supply system and the use of individual equipment for cleaning cages, may be effective measures to contain the spread of HEV in primate centers.