Rotavirus is a viral infection of the digestive tract that can cause severe dehydration.
Typical symptoms include fever, vomiting, and watery diarrhea.
The diagnosis is based on symptoms.
Routine vaccination can prevent rotavirus infection.
Most children get better by resting and drinking fluids, but a few are given fluids by vein (intravenously).
Rotavirus is the most common cause of severe, dehydrating diarrhea in young children aged 3 to 15 months. It is one of the viruses that causes gastroenteritis. In the United States before rotavirus vaccination became available, about 50,000 to 70,000 children under the age of 5 were hospitalized each year for diarrhea caused by rotavirus. Although hardly any children die in the United States from rotavirus, worldwide, the virus causes about 215,000 deaths a year in children under the age of 5. Most of these children live in low-income countries.
The virus is spread from person to person, especially if people with diarrhea do not thoroughly wash their hands after a bowel movement. Infection also can occur if people touch their mouth after touching an object (such as a diaper or toy) contaminated by infected stool. All such transmission involving infected stool is called fecal-oral transmission. People can also become infected if they eat food or drink water that is contaminated with the virus. Adults can become infected after close contact with an infected infant, but serious illness is rare.
During the winter in temperate climates, rotavirus causes most cases of diarrhea that are serious enough to send infants and toddlers to the hospital. Before the use of rotavirus vaccine in 2006, a wave of rotavirus illness would begin in the Southwest in November and end in the Northeast in March. Now, the disease occurs less predictably and can occur year round.
Rotavirus symptoms begin with fever and vomiting, followed by watery diarrhea, which typically lasts 5 to 7 days. If fluid losses are not replaced, dehydration often develops. Dehydration makes the child weak and listless, with a dry mouth and rapid pulse.
Practicing good hygiene is the best way to prevent gastroenteritis. A sick child and the people in the household should wash their hands frequently.