Is cholera caused by a virus?

Cholera bacteria can multiply in the intestine and produce a toxin that drives large-volume watery diarrhoea. The illness is different from viral gastroenteritis, although both can cause vomiting and diarrhoea. Symptoms alone cannot reliably identify the organism, so a clinician may consider the person's exposure, severity and local transmission pattern and may arrange testing.

The route of spread explains why safe water, sanitation and food hygiene are central to prevention. A person does not catch cholera simply because another person has a viral cold; contamination with infected stool is the relevant pathway.

Use safe fluids and begin oral rehydration therapy according to the product instructions if watery diarrhoea occurs and the person can drink. Avoid preparing food for others while unwell, wash hands with soap and clean bathroom surfaces carefully. Contact a healthcare service promptly, especially after exposure, travel to an affected area or sudden profuse diarrhoea. Treatment decisions should follow clinical assessment.

Urgent care is needed for severe thirst, dizziness, fainting, confusion, marked weakness, very little urine, repeated vomiting or inability to drink. These features suggest dehydration regardless of whether the cause is bacterial or viral. IV fluid therapy may be required when oral fluids cannot replace losses quickly enough.

Ask whether testing is needed to distinguish cholera from other causes of diarrhoea, which rehydration solution is suitable and how to protect people sharing your home. Mention recent travel, unsafe water exposure, contact with someone ill and the timing of symptoms.