Thus, choice of therapy for infections that may involve BacteroidesВ is empiric. Lack of identification and susceptibility testing of anaerobes can be attributed, in part, to its expense and the lack of timeliness in providing relevant information to the clinician ( 48). Those laboratories that do identify BacteroidesВ frequently do not perform susceptibility testing. Further, if more than three anaerobic organisms are isolated in a clinical specimen, many laboratories do not perform further identification. fragilis species, and lump all others into the B. Isolation and identification of BacteroidesВ spp pose a hurdle to many clinical laboratories most only identify the genus. All 10 species are usually isolated from the colon, although infections caused by or associated with them can include virtually any organ. Bacteroides, the predominant genus in the human intestine, are important in numerous metabolic activities and may provide some level of protection from invasive pathogens. Since 1990, many organisms previously designated as BacteroidesВ have been reclassified (see chapter on Anaerobes other than Bacteroides). At present, the Bacteroides fragilisВ group consists of ten species: B. Microbiologically, they are distinguished from other genera by growth in 20% bile. BacteroidesВ spp are non-spore forming gram-negative bacilli that are part of the human resident flora.

Sketchy micro pseudomonas