- With Mayo Clinic internist
James M. Steckelberg, M.D.
read biographyclose windowBiography of
James M. Steckelberg, M.D.
James Steckelberg, M.D.
Dr. James Steckelberg is chairman of the Division of Infectious Diseases at Mayo Clinic, a consultant and a professor of medicine at Mayo Medical School.
A native of Fremont, Neb., Dr. Steckelberg was a Rhodes Scholar and graduated from the Mayo Graduate School of Medicine as a resident in internal medicine and a fellow in infectious diseases, and is board certified in both. He is the former director of the Infectious Diseases Research Laboratory at Mayo Clinic.
Dr. Steckelberg belongs to numerous professional organizations. He is a founding member of the Musculoskeletal Infection Society of America and a fellow with the American College of Physicians and the Infectious Diseases Society of America. He has served on many Mayo Clinic committees and is a member of the Department of Medicine Leadership Committee and the executive committee of the Division of Infectious Diseases. He also served on the editorial boards of "Mayo Clinic Proceedings" and "Antimicrobial Agents & Chemotherapy" and has been an editorial reviewer for more than a dozen publications.
Dr. Steckelberg's research interests include experimental models of infection, epidemiology of infection, and antimicrobial resistance and therapy of bacterial infections.
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Question
Stomach flu: How long am I contagious?
How long am I contagious if I have the stomach flu?
Answer
from James M. Steckelberg, M.D.
It depends on which virus is causing your stomach flu (viral gastroenteritis). A number of viruses can cause gastroenteritis, including noroviruses and rotaviruses. The contagious period — the time during which a sick person can give the illness to others — is slightly different for each virus.
Norovirus is the most common cause of viral gastroenteritis in adults. Symptoms appear within one to three days of exposure. With norovirus, you're contagious from the moment you begin to feel ill. Although you typically feel better after a day or two, you're contagious for at least three days after you've recovered. Some people may be contagious for up to two weeks after recovery. Also, children are often contagious for a longer period than are adults.
Rotavirus is the leading cause of viral gastroenteritis in infants and young children. Symptoms of rotavirus appear one to two days after exposure. But you're contagious even before you develop symptoms, and you typically remain contagious for two weeks after you've recovered. Children are often contagious for a longer period than are adults.
For these reasons, it's important to wash your hands frequently and thoroughly — whether you feel ill or not. The viruses that cause gastroenteritis are spread through close contact with infected persons, such as by sharing food or eating utensils. Washing your hands is the most effective way to stop the spread of these viruses to others.
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