CFS & Fibromyalgia Causes & Risk Factors Enteroviruses and the Possible Link to Chronic Fatigue Syndrome By Adrienne Dellwo linkedin Adrienne Dellwo is an experienced journalist who was diagnosed with fibromyalgia and has written extensively on the topic. Learn about our editorial process Adrienne Dellwo Medically reviewed by Medically reviewed by Scott Zashin, MD on October 17, 2020 linkedin Scott J. Zashin, MD, specializes in the treatment of rheumatologic and musculoskeletal conditions using both traditional and alternative therapies. Learn about our Medical Review Board Scott Zashin, MD on October 17, 2020 Print Enteroviruses live and reproduce in your intestinal tract. They sometimes spread to other parts of the body, including the nervous system. Science Picture Co/Getty Images Humans are susceptible to more than 70 types of enteroviruses. They're extremely common—the only viruses that are more prevalent are those related to the "common cold." That means it's likely you've been exposed to some of them. However, that doesn't mean they've made you sick. Specific enteroviruses can cause various diseases, including poliomyelitis, rashes, mouth sores, hepatitis, aseptic meningitis, and inflammatory lung and heart disease. Most enterovirus infections, though, do not lead to disease. When they do make people sick, it's usually with a mild and cold-like illness or a flu-like illness that includes fever and muscle aches. Possible Link to ME/CFS Flu-like symptoms are also common in people with chronic fatigue syndrome, and the onset of this disease often comes right after the person has had a flu-like illness. That has made some researchers hypothesize that these viruses could play a role in chronic fatigue syndrome. For now, we can't say for certain whether an enterovirus infection could cause or contribute to an illness like chronic fatigue syndrome, but we do have some research pointing to a possible link: A 2008 study (Chia) showed a high predominance of enteroviruses in the guts of people with this disease, which researchers said could explain some of the common symptoms. A 2010 follow-up (Chia) suggested that acute infections of enteroviruses may lead to a "stalemate" situation between the virus and the immune system and that it may result in chronic fatigue syndrome. Another 2010 study (Zhang) linked enterovirus to a subtype of chronic fatigue syndrome and called enterovirus one of the two most common infectious triggers of the disease (along with the Epstein-Barr virus.) Because the bodies of people with chronic fatigue syndrome show signs of an activated immune system, scientists have long believed that many cases are caused either by an active viral or bacterial infection or by an infection that permanently alters the immune system before leaving the body. Was this page helpful? Thanks for your feedback! Learn about treatment and lifestyle changes to cope with fibromyalgia and chronic fatigue syndrome. Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Chia J, Chia A, Voeller M, Lee T, Chang R. Acute enterovirus infection followed by myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and viral persistence. J Clin Pathol. 2010;63(2):165-8. Chia JK, Chia AY. Chronic fatigue syndrome is associated with chronic enterovirus infection of the stomach. J Clin Pathol. 2008;61(1):43-8. Zhang L, Gough J, Christmas D, et al. Microbial infections in eight genomic subtypes of chronic fatigue syndrome/myalgic encephalomyelitis. J Clin Pathol. 2010;63(2):156-64.