Listeria. Listeria is a bacterium that causes a serious infection called listeriosis. Around 300 deaths are caused by Listeria infection each year, according to estimates from a 2011 CDC report. Listeria bacteria are most commonly found in raw foods. Vegetables can be contaminated by soil and water carrying bacteria.
Human male reproductive system. The scrotum is the bag that holds the testicles (commonly called balls) in male mammals. It is made of skin and muscle and is found between the penis and anus. It is often covered in pubic hair and becomes tight when the male is aroused.
Pain in the scrotum can be the result of serious conditions like testicular torsion or a sexually transmitted infection (STI). Ignoring the pain may cause irreversible damage to the testicles and scrotum. Often, problems with the testicles cause abdominal or groin pain before pain in the testicle develops.