Why is cholera an infectious disease

Cholera is an infectious disease because it is caused by a specific pathogenic microorganism, the bacterium Vibrio cholerae. This bacterium can be transmitted from an infected person or contaminated environment to a healthy person, primarily through the ingestion of contaminated food or water. The bacteria then colonize the small intestine and produce a toxin that causes severe diarrhea, which is the main symptom of the disease.