Cholera is an acute diarrhoeal disease caused by the bacterium Vibrio cholerae. It is most commonly associated with poverty, poor sanitation, and limited access to clean drinking water. While cholera is rare in high-income countries such as the UK, it remains a serious public health concern in parts of Africa, Asia, and the Middle East, and can pose a risk to travellers visiting affected areas.
Cholera can cause rapid dehydration and, if left untreated, may be life-threatening. However, with prompt treatment and appropriate preventive measures, the disease is highly manageable and largely preventable.
What Is Cholera?
Cholera is an infectious disease acquired through eating food or drinking water contaminated with Vibrio cholerae. Infection can lead to sudden onset of profuse watery diarrhoea, often described as “rice-water stools,” and sometimes vomiting. In severe cases, fluid loss can occur rapidly, leading to dehydration, electrolyte imbalance, and circulatory collapse.
Worldwide, an estimated 1.3 to 4 million cases of cholera occur each year, resulting in 21,000 to 143,000 deaths annually. Despite being preventable and treatable, cholera continues to affect vulnerable populations in regions with inadequate water and sanitation infrastructure.
Risk Areas and Global Distribution
Cholera is endemic in many low-income countries, particularly in parts of Sub-Saharan Africa, South and Southeast Asia, and the Middle East. Large outbreaks continue to occur, often following natural disasters, conflict, or displacement, where water and sanitation systems are disrupted.
Although reporting varies between countries, cholera remains a global health threat, and outbreaks can occur unexpectedly in regions that have not reported cases for many years.
Risk for Travellers
For most travellers, the risk of cholera is low, particularly when staying in areas with good sanitation and following standard food and water hygiene precautions. However, risk increases for:
- Aid and relief workers
- Travellers visiting areas experiencing cholera outbreaks
- Those living or working in refugee camps or remote areas
- Expatriates residing in endemic regions
Cholera does not occur naturally in the UK, but cases are occasionally reported in travellers returning from high-risk regions, particularly South Asia and parts of Africa.
How Cholera Is Transmitted
Cholera is transmitted through the faecal-oral route, primarily by consuming contaminated water or food. Common sources include untreated drinking water, poorly cooked seafood (especially shellfish), and food prepared in unhygienic conditions.
Person-to-person transmission is uncommon, as large numbers of bacteria are required to cause infection in people with normal stomach acid levels.
Signs and Symptoms
Cholera symptoms usually appear within 2 to 5 days of exposure, though they can develop within hours. Many infections are mild or symptom-free, but severe cases may present with:
- Sudden, watery diarrhoea
- Vomiting
- Severe dehydration
- Muscle cramps
- Weakness and shock in extreme cases
Without treatment, severe cholera can be rapidly fatal. With prompt care, recovery is usually quick and complete.
Diagnosis and Treatment
Cholera is diagnosed through laboratory testing of stool samples. The mainstay of treatment is rehydration, either with oral rehydration solution or intravenous fluids in severe cases. With timely treatment, mortality is less than 1%.
Antibiotics may be used in certain situations to shorten illness duration, particularly during outbreaks.
Prevention and Vaccination
Good food, water, and personal hygiene are the most effective preventive measures for travellers. This includes drinking safe water, avoiding raw or undercooked food, and practising regular hand hygiene.
An effective oral cholera vaccine is available in the UK and may be recommended for travellers whose activities or medical history place them at increased risk. Vaccination is not required for entry into any country but may provide additional protection for high-risk travellers.
Cholera Vaccination at Regent Street Clinic
Regent Street Clinic offers expert travel health advice and cholera vaccination where appropriate. Our clinicians assess your travel plans and personal risk to ensure you receive tailored, evidence-based protection.
Book your cholera consultation today and travel with confidence.