Cholera is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury.


What is Cholera ?



Cholera is an intestinal infection which is caused when a person consumes contaminated food or water. It is generally caused by the bacterium Vibrio cholerae. It has a short incubation period, from one day to five days. After contamination, bacteria produces an enterotoxin that causes a copious, painless, watery diarrhea that can quickly lead to severe dehydration and death if treatment is not promptly given. Vomiting also occurs in most patients.

The cholera bacteria are generally seen in water or food sources, that have been contaminated by faeces from a person infected with cholera. Cholera is usually seen in places with inadequate water treatment, poor sanitation and inadequate hygiene.

The cholera bacterium may also live in the environment in salty rivers and coastal waters.





Cholera Symptoms



Cholera infection is often mild or without symptoms, but can sometimes be severe.
Infected persons with severe disease will have:
  • Profuse watery diarrhea
  • Vomiting
  • Leg cramps.
In people, rapid loss of body fluids leads to dehydration and shock. If not treated it can lead to death within hours.



Cholera Causes



Cholera is a diarrheal illness caused by the bacteria Vibrio cholerae. This species is not common to humans, and its presence in the human digestive system is not part of the natural life cycle of the bacteria.

A person can get infected by drinking water or eating food contaminated with the cholera bacterium. In an epidemic, the source of the contamination is usually the faeces of an infected person that contaminates water and/or food. The disease can spread rapidly in areas with inadequate treatment of sewage and drinking water. The disease is not likely to spread directly from one person to another therefore, casual contact with an infected person is not a risk for becoming ill.



Cholera Diagnosis


Laboratory tests include stool gram stain (gram negative rods) culture, dark field microscopy or stool PCR. One must begin treatment even before diagnostic work-up.

Stool sample or a rectal swab is taken and is then send to a laboratory for the cholera bacterium.

Cholera cots: These are cots with openings to allow fecal output into a bucket, are used to measure volumes of stool loss and fluid replacement needs.



Cholera Prevention



To prevent cholera:
  1. Drink safe and clean water
  2. Wash your hands frequently with soap and clean water
  3. Proper hygiene and sanitation
  4. Cook food welland cover it properly

Now a days, there are two oral cholera vaccines available, Dukoral (manufactured by SBL Vaccines) which is World Health Organization (WHO) prequalified and licensed in over 60 countries, and ShanChol (manufactured by Shantha Biotec in India), which is licensed in India and is pending WHO prequalification. Because the vaccine is a two dose vaccine, multiple weeks can elapse before persons receiving the vaccine are protected.

Therefore, vaccination should not replace standard prevention and control measures.