An inclusive alphabetical list would be useful to indicate the scope of the numbers of kinds of organisms encompassed within the field of clinical bacteriology. Mycobacterium , which has mycolic acids within the cell wall. The names have sometimes been problematic. Since 1974 there has been a proliferation of new names. Names of some genera of clinical bacteria have changed more than once.
Some genera have two names until concensus is reached.
If they do, they are called anaerobes, as for example Fusobacterium sp. If they do not, the term facultative is generally used. Very few organisms strictly require aerobic conditions for growth. So in most cases an organism is said to be either an anaerobe or a facultative organism. Sources such as the cerebrospinal fluid and blood should never harbor any bacterial organisms and therefore any and all organisms from these sources are considered dangerous and are indications for antimicrobial therapy.