Research overview: distemper seroconversion and survival patterns in lion populations

Long-term study of marked lions has shown that many animals carry antibodies to canine distemper virus without dying, raising questions about when infection is lethal. This overview surveys research distinguishing benign seroconversion from epidemic mortality in lions, the evidence for multiple silent CDV waves before and after the deadly 1994 outbreak, and the factors, including co-infection and environmental stress, that determine outcome. It examines how serological histories of individually known animals illuminate the difference between exposure and disease. The synthesis connects these patterns to broader debates about pathogen virulence and context-dependence. It aims to help readers grasp why the same virus can pass through a population almost unnoticed in some years and cause mass death in others, a recurring puzzle in felid disease epidemiology.