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Cholera (also called Asiatic cholera) is a water borne disease caused by the bacterium Vibrio cholerae, which are typically ingested by drinking contaminated water, or by eating improperly cooked fish, especially shellfish.

V. cholerae occurs naturally in the plankton of fresh, brackish, and salt water, attached primarily to copepods in the zooplankton.

Coastal cholera outbreaks typically follow zooplankton blooms.

Cholera is transmitted through ingestion of feces contaminated with the bacterium.

The contamination usually occurs when untreated sewage is released into waterways or into groundwater, affecting the water supply, any foods washed in the water, and shellfish living in the affected waterway; it is rarely spread directly from person to person.

The resulting diarrhea allows bacteria to spread to other people under unsanitary conditions.

Note: This article excerpts material from the Wikipedia article "Cholera", which is released under the GNU Free Documentation License.

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