title: Anaerobic radiometric detection of facultative Gram-positive cocci in blood.
abstract: Radiometric detection of facultative gram-positive cocci, particularly streptococci, has been reported to be suboptimal. A recently marketed anaerobic Bactec bottle (7C) with purportedly improved capability to detect facultative gram-positive cocci in blood was compared with the previously available bottle in a study of simulated bacteremia. The Bactec system detected all beta-hemolytic streptococci and enterococci tested. Detection of alpha-hemolytic streptococci was improved in general. However, detection of Streptococcus mutans, Streptococcus bovis and Streptococcus pneumoniae remained suboptimal under anaerobic conditions. A metabolic index unit threshold for positivity of 15 is recommended when employing the anaerobic Bactec bottle.
mesh_terms: D000693:Anaerobiosis; D001431:Bacteriological Techniques / Q000295:instrumentation; D002245:Carbon Dioxide / Q000378:metabolism; D011874:Radiometry; D018805:Sepsis / Q000382:microbiology*; D013210:Staphylococcus / Q000302:isolation & purification* / Q000378:metabolism; D013291:Streptococcus / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D002245:Carbon Dioxide