MeSH annotation : GEN & unspecified only: prefer /genet with specific microbes: Manual 19.8.34; Manual
22.25; Manual 28.36.8.1; TN 196: avoid as an added coord with better specifics; SPEC
qualif permitted when viewed as specialty; DF: GENET MICROBIAL; specialty; general and unspecified only: prefer /genet with specific microbes;
Wikipedia link : https://en.wikipedia.org/wiki/Microbial genetics;