Abstract
IntroductionSperm travel through female reproductive tract seeking an oocyte to fertilise. During this journey, the sperm may interact with various substances and microorganisms that change its biology, interfering with reproductive success. The aim of this study was to evaluate the ability of human sperm to interact with and carry the bacteria Escherichia coli (E. coli) and Enterococcus faecalis (E. faecalis). Materials and methodsHuman sperm selected from semen samples of apparently healthy volunteers were incubated with increasing concentrations of E. coli and E. faecalis for one hour. Subsequently, quantitative cultures of the bacteria-sperm mixture were grown in MacConckey and chocolate agars with and without washing or post-infection treatment with trypsin. ResultsSperm interact and carry bacteria. Washes and trypsin treatment together cause a statistically significant reduction in colony-forming units for E. faecalis ATCC 29212, E. faecalis ATCC 51299 and E. coli ATCC 25922. ConclusionHuman sperm create strong interactions with E. coli and E. faecalis bacteria, promoting their dissemination in the female reproductive tract.
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