Cholera
Definition
Cholera is an infectious disease that affects the intestinal tract. It is rare today in developed countries. However, it has caused severe epidemics in the past. It continues to be a major public health problem throughout the world in underdeveloped countries. If left untreated, it may cause death within hours.
Causes
Cholera is caused by the bacterium
Vibrio cholera. This bacterium secretes a toxin that causes rapid loss of fluids from the small intestines. Cholera is spread by ingesting food or water contaminated by fecal waste. It is common in countries that lack adequate sewage disposal.
Risk Factors
Factors that increase your risk of getting cholera include:
- Eating contaminated food or fluids
- Eating raw or undercooked shellfish
- Living or traveling in areas where cholera is present
- Having blood group O—nine-fold increase in risk
- Having a compromised immune system
- Having low levels of stomach acid
Symptoms
Symptoms of cholera begin quickly and can be severe. They include:
- Sudden onset of painless, watery diarrhea without blood or pus
- Vomiting
-
Dehydration
- Thirst
- Muscle cramps
The severity of symptoms ranges from mild, short-lived diarrhea to shock and death due to extreme fluid loss. Most symptoms occur one to three days after exposure.
Diagnosis
The doctor will ask about your symptoms and medical history. A physical exam will be done. It is important to tell your doctor about any recent travel to areas where cholera is common. If cholera is suspected, stool and blood samples will be tested.
Treatment
Fluid Replacement
The first priority in treating cholera is to replace fluids and electrolytes lost through
diarrhea. In severe cases, uncorrected dehydration can be fatal. Hydration solutions can be given orally or through an IV.
Antibiotics
Antibiotic medications may help shorten the course of the disease. They may also be given to the people you live with to prevent them from becoming ill.
Prevention
Careful Eating Habits
You can prevent cholera by avoiding contaminated food and fluids in areas where cholera occurs. Currently, these areas include parts of these countries and continents:
- Asia
- Africa
- India
- South America
- Central America
When traveling in these areas, you are advised to:
- Eat only well-cooked foods that are served hot
- Avoid all raw or undercooked shellfish
- Avoid salads
- Avoid raw vegetables that you have not peeled yourself
- Carry oral rehydration solution (ORS) and know how to use it if you develop severe diarrhea
RESOURCES
Centers for Disease Control and Prevention
http://www.cdc.gov
World Health Organization
http://www.who.int/en
CANADIAN RESOURCES
Health Canada
http://www.hc-sc.gc.ca
Manitoba Health
Communicable Disease Control Unit
http://www.gov.mb.ca/health/publichealth/cdc/index.html
References
Cholera. Centers for Disease Control and Prevention website. Available at:
http://www.cdc.gov/cholera/index.html. Updated May 3, 2012. Accessed January 7, 2013.
Cholera. EBSCO DynaMed website. Available at:
https://dynamed.ebscohost.com/about/about-us.
Updated October 9, 2012. Accessed January 7, 2013.
Farmer P, Almazor CP, et al. Meeting cholera's challenge to Haiti and the world: a joint statement on cholera prevention and care.
PLoS Negl Trop Dis. 2011;5(5):e1145.
Harris JB, Khan AI, et al. Blood group, immunity, and risk of infection with
vibrio cholerae
in an area of endemity.
Infection and Immunity. 2005;73:7422-7427.
Ryan ET. The cholera pandemic, still with us after half a century: time to rethink.
PLoS Negl Trop Dis. 2011;5(1):e1003.
Sack DA, Sack RB, et al. Cholera.
Lancet. 2004;363:223-233.
World Health Organization, Cholera: 2010.
2011 Weekly Epidemiological Record. Jul 29;86(31):325-39. Available at
http://www.who.int/wer/2011/wer8631.pdf. Accessed January 7, 2013.