What term defines an outbreak of disease affecting many animals of one kind or species at the same time?

• A. Epizootic disease
• B. Endemic disease
• C. Pandemic disease
• D. Zoonotic disease

Answer: (A)

An outbreak affecting many animals of one kind at the same time is called an epizootic event. This term is the animal health counterpart to an epidemic in humans, signaling a sudden rise in disease cases that stands out from the normal background level within a species or area.

In contrast, an endemic disease is continually present at a baseline level in a population, not spiking dramatically. A zoonotic disease refers to ones that can be transmitted from animals to humans, which is about cross-species transmission rather than the scale of the outbreak within animals. A pandemic describes a disease that has spread over a very large geographic area, typically in humans, though it can involve animals in certain contexts, the defining idea for the question is the rapid, widespread outbreak within a single animal population, i.e., epizootic.