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Cholera

Also called: Cholera

A bacterial infection from contaminated water causing massive watery diarrhea and fast dehydration.

WhereAreas without clean water

Overview

Cholera can cause severe dehydration within hours.

Oral rehydration solution saves most lives.

Symptoms

Common signs:

  • Severe watery diarrhea
  • Signs of dehydration
  • Thirst or dark urine

Less common

  • Vomiting

When to get medical care

Call 911Call 911 now for: severe watery diarrhea, signs of dehydration.
Get care todayMilder symptoms that could be early signs.
See a doctor soonQuestions about lowering your risk.

Causes

Bacteria.

Does it spread or run in families?

  • Yes, it can spread from person to person.
  • How it spreads: water or germs from poop getting into the mouth.
  • Washing hands often and staying home when sick help protect others.

Who is more likely to get it

  • Travel

Diagnosis

This is diagnosed in the emergency room or hospital.

The exam

A physical exam.

Tests

Tests, if needed:

  • Stool test:

Treatment

Emergency care is needed. While waiting for help:

Self-care

  • Drink oral rehydration solution
  • Drink only bottled or treated water when traveling
  • Drink oral rehydration drinks

Prevention

To lower your risk or prevent problems:

  • Drink safe water

Which doctor treats this

  • Emergency doctors treat it first, in the ER.
  • They may send you to an infectious disease specialist, for hard-to-treat infections.

Back to school, work, or sports

  • Stay home until 2 days after vomiting and diarrhea stop, especially if you work with food, children, or patients.
  • Wash hands well after using the toilet.

Children, pregnancy, and older adults

  • Travelers: Vaccine available for some trips.
  • Travelers: Higher risk.

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • Some infections can pass to the baby during pregnancy or birth. Tell your provider if you've been exposed.
  • Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
  • Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
  • Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

For caregivers

  • Go to visits when you can and take notes.
  • Keep a list of medicines, allergies, and doctors in one place.
  • Learn the warning signs that need fast care.
  • Learn CPR. Many hospitals and the Red Cross offer classes.
  • Take breaks and ask for help. Caregivers need care too.

Outlook

Most recover with fluids.

Getting ready for your visit

Bring a list of your symptoms and medicines.

What to bring

  • A list of your medicines and supplements
  • Notes on when symptoms started and what makes them better or worse

Questions to ask

  • What follow-up care do I need?
  • How can I prevent this from happening again?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Cholera

Sources

Last updated 2026-11-12.