title: Clinical comparison of the BACTEC 9000 Standard Anaerobic/F and Lytic/F blood culture media.
abstract: An 8-month prospective, volume controlled, comparison of Standard Anaerobic/F media with a new anaerobic high blood volume lytic medium (Lytic/F) was performed. A total of 2,092 compliant sets, consisting of an aerobic resin bottle or standard aerobic bottle, Standard Anaerobic/F, and Lytic/F bottle were evaluated. A total of 220 (10.6%) positive specimens were detected from the paired anaerobic bottles. These consisted of 194 true positive and 26 false positive bottles. Of 207 total organisms isolated, 122 were considered clinically significant. A comparison of significant organism recovery revealed 79 isolates in both anaerobic bottles, 7 isolates in the standard Anaerobic/F bottle only, and 36 isolates in the Lytic/F bottle only (p < 0.001). The lytic/F bottle detected significantly more Enterobacteriaceae (p < 0.005) and Streptococci (p < 0.05). There were 24 false positive Standard Anaerobic/F bottles and 2 false positive Lytic/F bottles (p < 0.001). When both bottles were positive the Standard Anaerobic/F bottle was positive 12 hours earlier in 1 instance whereas the Lytic/F bottle was positive 12 hours earlier in 8 instances. The mean time for detection in the Standard Anaerobic/F bottle was 18.2 hours versus 13.2 hours for the Lytic/F bottle. The new Lytic/F anaerobic blood culture media was found to be superior to Standard Anaerobic/F media for both total organism recovery and time to organism detection.
authors.affiliation: Microbiology Laboratory, Rochester General Hospital, New York 14621, USA.
authors.forename: G E
authors.initials: GE
authors.lastname: Hollick
authors.forename: R
authors.initials: R
authors.lastname: Edinger
authors.forename: B
authors.initials: B
authors.lastname: Martin
mesh_terms: D000693:Anaerobiosis; D016470:Bacteremia / Q000175:diagnosis*; D001419:Bacteria / Q000254:growth & development*; D001769:Blood / Q000378:metabolism* / Q000382:microbiology*; D003470:Culture Media / Q000378:metabolism*; D005189:False Positive Reactions; D006801:Humans; D013997:Time Factors
chemical_list: D003470:Culture Media