This is not usually considered a sexually transmitted disease. It is usually transmitted by the fecal-oral route with outbreaks due to contaminated food or water.
Cause: the hepatitis A virus
Symptoms: loss of appetite, nausea, vomiting, fatigue, yellow tinge to eyes or skin
Complications: Usually none
Treatment: Only supportive care is usually necessary.
Prevention: Don't engage in oral-anal sexual contact. This practice occurs almost exclusively with male homosexuals.