infectious diseases
Sexually Transmitted Enteric Infections
Introduction
Various pathogens—bacterial ( Shigellosis , Oral-rectal Anal-genital Oral-genital Genital-genital intercourse Although some of the above bacterial and parasitic pathogens may cause proctitis, they usually cause infection higher in the intestinal tract; symptoms include diarrhea, fever, bloating, nausea, and abdominal pain. Multiple infections are frequent, especially in people who have many sex partners and who engage in sexual practices that lead to direct or indirect oral-rectal contact. Most of these pathogens can cause infections without symptoms; asymptomatic infection is the rule withEntamoeba dispar(formerly, nonpathogenicEntamoeba histolytica), which commonly occurs in men who have sex with men. (See also Overview of Sexually Transmitted Infections .) 