Shigella Infection (Shigellosis)
Shigella (or shigellosis) is an infectious disease which can cause diarrhoea, fever and stomach cramps. It is usually caught from another person, but it can be caught from contaminated food or water.
Shigella are bacteria that can infect the digestive tract and cause a wide range of symptoms, from diarrhea, cramping, vomiting, and nausea, to more serious complications and illnesses. Infections, called shigellosis, sometimes go away on their own; in others, antibiotics can shorten the course of the illness.
Shigellosis is an infectious disease caused by a group of bacteria called Shigella. Most who are infected with Shigella develop diarrhea, fever, and stomach cramps starting a day or two after they are exposed to the bacteria. The diarrhea is often bloody. Shigellosis usually resolves in 5 to 7 days. Persons with shigellosis in the United States rarely require hospitalization. A severe infection with high fever may be associated with seizures in children less than 2 years old. Some persons who are infected may have no symptoms at all, but may still pass the Shigella bacteria to others.
In very severe cases of shigellosis, a person may have convulsions (seizures), a stiff neck, a headache, extreme tiredness, and confusion. Shigellosis can also lead to dehydration and in rare cases, other complications, like arthritis, skin rashes, and kidney failure. Some children with severe cases of shigellosis may need to be hospitalized.
Treatment consists mainly of replacing fluids and salts lost because of diarrhea. Oral replacement is satisfactory for most people, but some may need to receive fluids intravenously. In most cases, the disease resolves within 4 to 8 days without antibiotics. Severe infections may last 3 to 6 weeks. Antibiotics such as trimethoprim-sulfamethoxazole, norfloxacin, ciprofloxacin, or furazolidone may be given when the person is very young or very old, when the disease is severe, or when there is a high risk of the infection spreading to other people. The severity of the symptoms and the length of time the stool contains Shigella are reduced with antibiotics. Antidiarrheal drugs (such as diphenoxylate or loperamide) may prolong the infection and should not be used.
The best way to prevent the spread of Shigella is by frequent and careful hand washing with soap, especially after they use the toilet and before they eat. This is especially important in a child-care setting.
If you’re caring for a child who has diarrhea, wash your hands before touching other people and before handling food. (Anyone with a diarrhea should not prepare food for others.) Be sure to frequently clean and disinfect any toilet used by someone with shigellosis.