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E. coli is a type of bacteria that normally live in the intestines of people and animals. However, some types of E. coli, particularly E. coli O157:H7, can cause intestinal infection. E. coli O157:H7 and other strains that cause intestinal sickness are called Shiga toxin–producing E. coli (STEC) after the toxin that they produce.
People with weakened immune systems, pregnant women, young children, and older adults are at increased risk for developing these complications.
Most intestinal infections are caused by contaminated food or water. Proper food preparation and good hygiene can greatly decrease your chances of developing an intestinal infection.
Most cases of intestinal E. coli infection can be treated at home. Symptoms generally resolve within a few days to a week.
Symptoms of intestinal infection generally begin between 1 and 10 days after you’ve been infected with E. coli. This is known as the incubation period. Once symptoms appear, they usually last around 5 to 10 days.
Symptoms can include:
Symptoms can last anywhere from a few days to more than a week.
Symptoms of a severe E. coli infection may include:
Call your doctor if you experience any of these severe symptoms.
According to the Centers for Disease Control and Prevention, about 5 to 10 percent of those who are infected develop hemolytic uremic syndrome (HUS), a condition in which the red blood cells are damaged. This can lead to kidney failure, which can be life-threatening, especially for children and the elderly. HUS generally begins about 5 to 10 days after the onset of diarrhea.
People and animals normally have some E. coli in their intestines, but some strains cause infection. The bacteria that cause infection can enter into your body in a number of ways.
Whether food is prepared at home, in a restaurant, or in a grocery store, unsafe handling and preparation can cause contamination. Common causes of food poisoning include:
During the slaughtering process, poultry and meat products can acquire bacteria from the animals’ intestines.
Poor sanitation can cause water to contain bacteria from human or animal waste. You can get the infection from drinking contaminated water or from swimming in it.
E. coli can spread when an infected person doesn’t wash their hands after having a bowel movement. The bacteria are then spread when that person touches someone or something else, like food. Nursing homes, schools, and child care facilities are particularly vulnerable to person-to-person spreading.
People who work with animals, especially cows, goats, and sheep, are at increased risk for infection. Anyone who touches animals or who works in an environment with animals should wash their hands regularly and thoroughly.
While anyone can experience an E. coli infection, some people are more at risk than others. Some risk factors include:
Intestinal infection can lead to dehydration and serious complications, such as kidney failure and sometimes death, if it’s not treated. You should see your doctor if:
A doctor can confirm an E. coli infection with a simple stool sample.
In most cases, home care is all that’s required to treat an E. coli infection. Drink plenty of water, get lots of rest, and keep an eye out for more severe symptoms that require a call to your doctor.
If you have bloody diarrhea or fever, check with your doctor before taking over-the-counter antidiarrheal medications. You should always check with your pediatrician before giving medications to infants or children.
If dehydration is a concern, your doctor may order hospitalization and intravenous fluids.
Most people show improvement within five to seven days after the onset of an infection, and make a full recovery.
Practicing safe food behaviors can decrease your chances of developing an intestinal infection due to E. coli. These include:
You should also make sure that all meat is cooked properly. The U.S. Department of Agriculture provides guidelines for cooking meat and poultry to proper temperatures to make sure all bacteria are killed. You can use a meat thermometer to check that meat is cooked to these temperatures:
One of the easiest things you can do to prevent an E. coli infection is to regularly wash your hands. You should wash your hands before handling, serving, or eating food, and especially after touching animals, working in animal environments, or using the bathroom. Practicing good hygiene and following food safety guidelines can go a long way to decreasing your risk of infection.
Written by: Ann Pietrangeloon: Aug 17, 2017
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