Penile bacteria, SEM

Numéro d’image : 12378823
Penile bacteria, SEM
Bacteria from a penis. Coloured scanning electron micrograph of bacteria from an uncircumcised penis. The skin of the penis is home to a diverse community of bacteria. Genetic tests to identify the bacteria found on men's penises showed there were a total of 42 unique kinds of bacteria inhabiting the skin of the penis. Studies have shown uncircumcised and circumcised penises don't have the same variety and abundance of bacteria. After circumcision, there were fewer kinds of bacteria. Many of the kinds of bacteria found to be less common or absent after circumcision were anaerobic (don't need oxygen to grow). Circumcision has been linked to a lower risk of contracting HIV (human immunodeficiency virus). One theory is the anaerobic bacteria may prompt the immune system to respond in a way that makes cells more vulnerable to HIV infection. Magnification: x6600 when printed at 10 centimetres wide.
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 4572 px × 3911 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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