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Journal of Clinical Microbiology, March 2001, p. 983-989, Vol. 39, No. 3
Department of Pathology and Laboratory
Services, Denver Health Medical Center, Denver, Colorado
802041; Department of Pathology,
University of Colorado School of Medicine, Denver, Colorado
802622; Clinical Microbiology
Laboratory, Robert Wood Johnson University
Hospital,6 and Departments of
Pathology7 and
Medicine,8 Robert Wood Johnson
Medical School, New Brunswick, New Jersey 08901; and Clinical
Microbiology Laboratory,3 and
Departments of Pathology4 and
Medicine,5 Duke University Medical
Center, Durham, North Carolina 27710
Received 26 July 2000/Returned for modification 7 November
2000/Accepted 29 December 2000
To determine the optimal anaerobic companion bottle to pair with
BACTEC Plus Aerobic/F medium for recovery of pathogenic microorganisms from adult patients with bacteremia and fungemia, we compared Plus
Anaerobic/F bottles with Standard Anaerobic/F bottles, each of which
was filled with 4 to 6 ml of blood. The two bottles were paired with a
Plus Aerobic/F bottle filled with 8 to 12 ml of blood. A total of
14,011 blood culture sets were obtained. Of these, 11,583 sets were
received with all three bottles filled adequately and 12,257 were
received with both anaerobic bottles filled adequately. Of 818 clinically important isolates detected in one or both adequately filled
anaerobic bottles, significantly more staphylococci (P < 0.001), streptococci (P < 0.005),
Escherichia coli isolates (P < 0.02),
Klebsiella pneumoniae isolates (P < 0.005), and all microorganisms combined (P < 0.001)
were detected in Plus Anaerobic/F bottles. In contrast, significantly
more anaerobic gram-negative bacilli were detected in Standard
Anaerobic/F bottles (P < 0.05). Of 397 unimicrobial
episodes of septicemia, 354 were detected with both pairs, 30 were
detected with Plus Aerobic/F-Plus Anaerobic/F pairs only, and 13 were
detected with Plus Aerobic/F-Standard Anaerobic/F pairs only
(P < 0.05). Significantly more episodes of bacteremia
caused by members of the family Enterobacteriaceae (P < 0.05) and aerobic and facultative gram-positive
bacteria (P < 0.025) were detected with Plus
Anaerobic/F bottles only. In a paired-bottle analysis, 810 of 950 isolates were recovered from both pairs, 90 were recovered from Plus
Aerobic/F-Plus Anaerobic/F pairs only, and 50 were recovered from Plus
Aerobic/F-Standard Anaerobic/F pairs only (P < 0.001).
Paired Plus Aerobic/F-Plus Anaerobic/F bottles yielded significantly
more staphylococci (P < 0.001), streptococci
(P < 0.05), and members of the family
Enterobacteriaceae (P <0.001). We conclude
that Plus Anaerobic/F bottles detect more microorganisms and episodes
of bacteremia and fungemia than Standard Anaerobic/F bottles as
companion bottles to Plus Aerobic/F bottles in the BACTEC 9240 blood
culture system.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.3.983-989.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Controlled Clinical Comparison of BACTEC Plus Anaerobic/F to
Standard Anaerobic/F as the Anaerobic Companion Bottle to Plus
Aerobic/F Medium for Culturing Blood from Adults
*
Corresponding author. Mailing address: Department of
Pathology and Laboratory Services, Mail Code #0224, Denver Health
Medical Center, Denver, CO 80204-4507. Phone: (303) 436-6434. Fax:
(303) 436-6420. E-mail: mwilson{at}dhha.org.
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