Īpplying the mouth to the genitals immediately after applying it to the anus can introduce the bacterium Escherichia coli (" E. Diseases which may be transmitted by contact with feces include: bacterial diseases including shigellosis (bacillary dysentery) viral systemic diseases including hepatitis A, hepatitis B, hepatitis C, poliomyelitis, human papillomavirus (HPV) and herpes simplex virus parasites including intestinal parasites and infections and inflammations chlamydia infection, gastroenteritis, conjunctivitis, gonorrhea, lymphogranuloma venereum and other sexually transmitted infections. Īnilingus has potential health risks arising from the oral contact with human feces.