Research overview: canine distemper virus in wild lions

A canine distemper virus outbreak caused substantial mortality in the lions of the Serengeti-Mara ecosystem in the mid-1990s, a landmark event in wildlife disease ecology that demonstrated how a virus associated with domestic dogs could devastate a wild felid population. Investigation linked the epizootic to spillover and explored co-factors such as concurrent tick-borne disease in driving severity. This overview compiles the disease-ecology literature rather than one source, describing how distemper crossed into lions, why domestic dog reservoirs and co-infections influenced the outbreak, and how it spurred vaccination efforts in surrounding dog populations to protect wildlife. It matters because the event highlighted the threat of cross-species disease transmission at the domestic-wildlife interface and shaped conservation strategies for protecting big cats from pathogens of domestic animals.