Gut Infections in Men Who Have Sex with Men – UW Medicine
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- The increasing prevalence of drug-resistant gut pathogens and their potential for transmission,including through sexual contact,is raising notable concerns among researchers and public health officials.A recent review published in...
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The Rising Threat of Sexually transmitted Gut Infections: A Complete Guide
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(Image: A visually compelling, but not overly graphic, image representing gut health and/or interconnectedness. Consider a microscopic view of gut bacteria, or a stylized representation of the digestive system.)
The increasing prevalence of drug-resistant gut pathogens and their potential for transmission,including through sexual contact,is raising notable concerns among researchers and public health officials.A recent review published in Clinical Microbiology Reviews highlights the urgent need for improved control and prevention strategies for these ”sexually transmitted enteric infections” (STEI). This article provides a comprehensive overview of STEI, exploring what they are, how they spread, who is at risk, the challenges in diagnosis and treatment, and what steps can be taken to mitigate this growing global health threat.
What are Sexually Transmitted Enteric Infections (STEI)?
Enteric infections, those affecting the lower digestive tract, have long been associated with foodborne and waterborne transmission. However, research dating back to the 1960s and 70s has established a clear link between sexual activity and the spread of certain gut pathogens. These infections, especially prevalent among men who have sex with men (MSM), are now being recognized as a significant public health issue, described by researchers as “the newest of the old diseases.”
How are STEI Spread?
While food and water contamination remain critically important routes of transmission for many enteric pathogens, STEI are primarily spread through:
* Fecal-oral contact: This can occur during sexual activity, including oral-anal contact (anilingus).
* Contaminated surfaces: Pathogens can survive on surfaces and be transferred during sexual contact.
* Poor hygiene: Inadequate handwashing after using the restroom can contribute to spread.
The ease of international travel plays a crucial role in the global dissemination of these infections. Individuals can acquire resistant strains abroad and unknowingly introduce them to new populations.
Who is at Risk?
While anyone can contract an enteric infection,certain populations are at higher risk of STEI:
* Men who have sex with men (MSM): This group experiences a disproportionately high incidence of STEI.
* Individuals with multiple sexual partners: Increased sexual activity increases the risk of exposure.
* Individuals with compromised immune systems: Weakened immunity makes individuals more susceptible to infection and severe illness.
* Travelers: Exposure to different pathogens in other countries can increase risk.
* Individuals engaging in specific sexual practices: Practices involving fecal-oral contact carry a higher risk.
Common Pathogens Involved in STEI
Researchers have identified a dozen recognized STEI pathogens, with uncertainty surrounding the role of sexual transmission for a few others. These include:
* bacteria:
* Diarrhea-causing strains of Escherichia coli (e.g., EHEC, EPEC)
* Salmonella
* Shigella
* Clostridioides difficile (formerly Clostridium difficile) – While often associated with antibiotic use, sexual transmission is being investigated.
* Brachyspira – A spirochete bacterium colonizing the intestines.
* Protozoa:
* Entamoeba histolytica
* Giardia
* Cryptosporidium
* Cystoisospora
* Microsporidia
* Strongyloides
* Viruses:
* H