Gastrointestinal Tract - The structure in the body, beginning with the mouth and extending to the anus, through which food is ingested, broken down, and absorbed to provide the body with nutrients, and waste products are excreted.⏎
Endemic - The baseline level of disease usually present in a community.⏎
Ecology - A branch of science that deals with the relation of organisms to one another and their physical environment.⏎
Encephalitis - Inflammation of the brain, often caused by a virus.⏎
Evolution - The change in heritable traits in a population of organisms over successive generations.⏎