Vibrio: A genus of short rigid motile bacteria of the family Vibrionaceae that are straight or curved rods, have one or sometimes two or three polar flagella enclosed in a sheath, and include various saprophytes and a few pathogens (as V. cholerae, the cause of cholera in humans).

Virus: A small infectious agent that can only replicate inside the cells of another organism. Viruses are too small to be seen directly with a light microscope. Viruses infect all types of organisms, from animals and plants to bacteria and archaea.

Wet market: A market where most of the commodities for sale are live animals or readily perishable foods.

Yersinia enterocolitica: A pleomorphic Gram-negative bacillus that belongs to the family Enterobacteriaceae. As a human pathogen, Y. enterocolitica is most frequently associated with acute diarrhea, terminal ileitis, mesenteric lymphadenitis, and pseudoappendicitis.

Zoonoses: Microbes that are naturally transmitted between animals and humans that cause disease in human populations but can be perpetuated solely in non-human host animals (e.g., influenza, rabies).

Zoonotic infection: Infection that causes disease in human populations but can be perpetuated solely in nonhuman host animals (e.g., bubonic plague); may be enzootic or epizootic.



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