![]() If your resistance to infection is low - for instance, if your immune system is compromised by HIV/AIDS, chemotherapy or another medical condition - you may be especially at risk.Įach gastrointestinal virus has a season when it's most active. ![]() Anywhere that groups of people come together in close quarters can be an environment for an intestinal infection to get passed. Schoolchildren or dormitory residents.They also live in close contact with others who may pass along germs. Older adults in nursing homes are vulnerable because their immune systems weaken. Adult immune systems tend to become less efficient later in life. Children in child care centers or elementary schools may be especially vulnerable because it takes time for a child's immune system to mature. People who may be more susceptible to gastroenteritis include: Gastroenteritis occurs all over the world and can affect people of all ages. But in many cases the virus is passed when someone with a virus handles food you eat without washing his or her hands after using the toilet. Contaminated drinking water is a cause of viral diarrhea. Some shellfish, especially raw or undercooked oysters, also can make you sick. A vaccine against viral gastroenteritis is available in some countries, including the United States, and appears to be effective in preventing the infection. This is of particular concern in institutional settings such as nursing homes because adults with the virus unknowingly can pass the virus to others. The infection is most severe in infants and young children.Īdults infected with rotavirus may not have symptoms, but can still spread the illness. It can also spread through contaminated food. Worldwide, this is the most common cause of viral gastroenteritis in children, who are usually infected when they put their fingers or other objects contaminated with the virus into their mouths. You can also get the virus by touching a surface that's been contaminated with norovirus and then touching your mouth. But it can also spread between people who are in close contact or who share food. In most cases, you pick up the virus from contaminated food or water. It's especially likely to spread among people in confined spaces. Norovirus infection can sweep through families and communities. Both children and adults are affected by noroviruses, the most common cause of foodborne illness worldwide. Many viruses can cause gastroenteritis, including: You may also be likely to get gastroenteritis if you share utensils, towels or food with someone who has one of the viruses that cause the condition. You're most likely to get viral gastroenteritis when you eat or drink contaminated food or water.
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