Lysozyme protects us from the ever-present danger of bacterial infection. It is a small enzyme that attacks the protective cell walls of bacteria. It protects many places that are rich in potential food for bacterial growth.  Our tears and mucus contain lysozyme to resist infection of our exposed surfaces.

Inflammation of the meatus, one of the possible consequences of circumcision.

A bacterium found in smegma, described as "avirulent" or "relatively benign". M. smegmatis has been accused (without evidence) of contributing to penile cancer. Broxmeyer found that a bacteriophage found in M. smegmatis may be effective against tuberculosis.

The period immediately following birth, newborn (adjective).