Frequency of HPV-positive sperm using fluorescence in situ hybridization with HPV type-specific probes.

<p>Low magnification pictures illustrating the quantity of HPV in positive semen samples. Samples are positive for HPV-6, -16, -18, and -31, respectively. Samples are stained for HPV with PE-conjugated streptavidin (red) and stained for DNA with DAPI (blue). Pictures are representatives of coincidental spots of the preparation slides, which are representatives of HPV positive semen samples from 9 donors (HPV-6, -16, -18, and -31 represented by 2–3 donors each).