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Journal of Clinical Microbiology, Sep 1995, 2382-2387, Vol 33, No. 9
I Brook and EH Frazier
The microbiological and clinical characteristics of 83 patients with
necrotizing fasciitis (NF) treated over a period of 17 years are presented.
Bacterial growth was noted in 81 of 83 (98%) of specimens from patients
with NF. Aerobic or facultative bacteria only were recovered in 8 (10%)
specimens, anaerobic bacteria only were recovered in 18 (22%) specimens,
and mixed-aerobic-anaerobic floras were recovered in 55 (68%) specimens. In
total, there were 375 isolates, 105 aerobic or facultative bacteria and 270
anaerobic bacteria, for an average of 4.6 isolates per specimen. The
recovery of certain bacteria from different anatomical locations correlated
with their distribution in the normal flora adjacent to the infected site.
Anaerobic bacteria outnumbered aerobic bacteria at all body sites, but the
highest recovery rate of anaerobes was in the buttocks, trunk, neck,
external genitalia, and inguinal areas. The predominant aerobes were
Staphylococcus aureus (n = 14 isolates), Escherichia coli (n = 12), and
group A streptococci (n = 8). The predominant anaerobes were
Peptostreptococcus spp. (n = 101), Prevotella and Porphyromonas spp. (n =
40), Bacteroides fragilis group (n = 36), and Clostridium spp. (n = 23).
Certain clinical findings correlated with some bacteria: edema with B.
fragilis group, Clostridium spp., S. aureus, Prevotella spp. and group A
streptococci; gas and crepitation in tissues with members of the family
Enterobacteriaceae and Clostridium spp.; and foul odor with Bacteroides
spp. Certain predisposing conditions correlated with some organisms: trauma
with Clostridium spp.; diabetes with Bacteroides spp., members of the
family Enterobacteriaceae, and S. aureus; and immunosuppression and
malignancy with Pseudomonas spp. and members of the family
Enterobacteriaceae.(ABSTRACT TRUNCATED AT 250 WORDS)
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Clinical and microbiological features of necrotizing fasciitis
Department of Pediatrics and Infectious Diseases, Navy Hospital, Bethesda, Maryland, USA.
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