| | Enteritis usually results in diarrhea and abdominal cramping without signs of proctitis or proctocolitis; it occurs among persons whose sexual practices include oral-anal contact. In otherwise healthy persons, Giardia lamblia is most frequently implicated. When outbreaks of gastrointestinal illness occur among social or sexual networks of [[MSM]], clinicians should consider sexual transmission as a mode of spread and provide counseling accordingly. Among persons with HIV infection, enteritis can be caused by pathogens that may not be sexually transmitted, including CMV, Mycobacterium avium–intracellulare, Salmonella sp., Campylobacter sp., Shigella sp., Cryptosporidium, Microsporidium, and Isospora.<ref>[https://www.cdc.gov/std/tg2015/proctitis.htm Proctitis, Proctocolitis, and Enteritis], Centers for Disease Control and Prevention, 2015</ref>}} | | Enteritis usually results in diarrhea and abdominal cramping without signs of proctitis or proctocolitis; it occurs among persons whose sexual practices include oral-anal contact. In otherwise healthy persons, Giardia lamblia is most frequently implicated. When outbreaks of gastrointestinal illness occur among social or sexual networks of [[MSM]], clinicians should consider sexual transmission as a mode of spread and provide counseling accordingly. Among persons with HIV infection, enteritis can be caused by pathogens that may not be sexually transmitted, including CMV, Mycobacterium avium–intracellulare, Salmonella sp., Campylobacter sp., Shigella sp., Cryptosporidium, Microsporidium, and Isospora.<ref>[https://www.cdc.gov/std/tg2015/proctitis.htm Proctitis, Proctocolitis, and Enteritis], Centers for Disease Control and Prevention, 2015</ref>}} |