Asymptomatic Bacteriospermia in Infertile Men*

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Abstract
The aerobic and anaerobic flora of the semen was examined in 109 infertile men. Not 1 specimen was sterile and 107 specimens contained 2 or more different bacterial species. Anaerobic organisms were found in 63.3% of specimens. Various organisms were isolated that were spermicidal in vitro (viridans and hemolytic streptocci, Proteus vulgaris and Escherichia coli) from a large number of samples. If the presence of microorganisms in the semen is associated with infertility, it is likely that only certain organisms are involved or that the numbers of organisms must be high for an effect to be seen. The presence of organisms in the semen may also be related to gynecologic infections.