Epizootiology

Definition

The study of disease patterns in animal populations, applying epidemiological principles to non-human hosts including wildlife, livestock, and invertebrates; encompasses the frequency, distribution, determinants, and dynamics of health and disease events, with particular attention to transmission mechanisms, host–pathogen interactions, and population-level impacts.

Etymology

From Greek epi- (upon) + zōion (animal) + -logia (study of), parallel construction to 'epidemiology' for human populations

Example

Epizootiological investigations of white-nose syndrome in bats track the spatial spread and seasonal mortality patterns caused by the fungal pathogen Pseudogymnoascus destructans, while studies of honey bee colony collapse disorder examine how Varroa mite infestations interact with viral pathogens to produce population-level collapses across apiaries.

Synonyms

• veterinary epidemiology
• animal disease ecology

Related Terms

• Epidemiology
• Epizootic
• enzootic
• vector biology
• host–pathogen dynamics
• disease surveillance
• pathogen spillover
• Population ecology

Usage Notes

Distinguished from epidemiology (human populations) and epizootic (the outbreak event itself). In entomological contexts, epizootiology often focuses on arthropod-borne diseases affecting vertebrates or on disease outbreaks within arthropod populations, such as fungal epizootics in grasshoppers or viral infections in silkworms. The term implies population-level analysis rather than individual clinical cases.