What should you know about cholera mary?

People sometimes use unusual or informal wording when searching for cholera. “Cholera Mary” does not identify a recognised vaccine, medicine, or separate form of the infection. The clinical concern is cholera itself: an intestinal infection that can cause sudden, profuse watery diarrhoea and rapid loss of fluids and salts.

The appearance of diarrhoea does not by itself prove cholera, since several illnesses can cause it. A clinician may use the illness pattern, exposure history, examination, and local testing guidance to decide what is needed. See [Diarrhoea](/symptoms/diarrhoea/) for symptom guidance.

If cholera is suspected, begin suitable oral rehydration while arranging medical advice. Give frequent small sips, especially when nausea is present, and use a correctly prepared solution rather than relying on plain water alone. Wash hands with soap, use safe water, and keep soiled clothing and surfaces away from other people.

Do not wait for a named medicine before replacing fluid. A healthcare team may recommend [Oral Rehydration Therapy](/treatments/acute-and-urgent-care/oral-rehydration-therapy/) or, when dehydration is severe, [IV Fluid Therapy](/treatments/acute-and-urgent-care/iv-fluid-therapy/).

Seek urgent care for frequent watery stools, inability to drink, repeated vomiting, very little urine, severe thirst, dizziness, fainting, confusion, or unusual drowsiness. Children and frail adults can deteriorate quickly. Separate symptom management from diagnosis: these warning signs need care even when the cause has not been confirmed.

Ask what the phrase refers to in your situation, whether testing is needed, which rehydration product to use, and how to protect household members from contaminated water or food.