sperm antibodies , measured by an enzyme-linked immunosorbent assay , were detected in 14 of 29 men ( 48 % ) with culture-positive asymptomatic infections , 8 of 17 men ( 47 % ) with a history of prostatitis or urethritis , 11 of 33 men ( 33 % ) with either a varicocele or an abnormal semen analysis , and only 1 of 21 men ( 5 % ) with no infection and a normal semen analysis .
C0275522
asymptomatic infections
C0009450
infection