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  • Title: Aerobic and anaerobic microbiology of infection after trauma.
    Author: Brook I, Frazier EH.
    Journal: Am J Emerg Med; 1998 Oct; 16(6):585-91. PubMed ID: 9786544.
    Abstract:
    Clinical and laboratory data from 1973 to 1988 were retrospectively reviewed to study the microbiology of infection following trauma. A total of 368 specimens obtained from 340 trauma patients showed bacterial growth. The traumas included lacerations (163), blunt trauma (76), penetrating trauma (65), bites (20), and open fractures (10). Anaerobic bacteria only were isolated in 119 (32%) specimens, aerobic bacteria only in 58 (16%), and mixed aerobic-anaerobic flora in 191 (52%). A total of 444 anaerobic (1.2 isolates per specimen) and 267 aerobic or facultative (0.7 per specimen) were recovered. The predominant anaerobic bacteria included Bacteroides fragilis group (119 isolates), Peptostreptococcus spp (113), Clostridium spp (78), Prevotella spp (58), and Fusobacterium spp (23). The predominant aerobic bacteria included Escherichia coli (83), Staphylococcus aureus (61), Streptococcus pyogenes (27), Streptococcus group D (16), and Klebsiella pneumoniae (16). The types of infections included abscesses (109), bacteremia (32), bites (13), empyema (10), osteomyelitis (21), peritonitis (52), thrombophlebitis (12), and wounds (116, including posttraumatic wounds, cellulitis, stump wound, decubitus ulcers, myositis, and fasciitis). S. aureus was isolated at all sites. However, organisms of the oropharyngeal flora predominated in infections that originated from that location (ie, head and neck wounds, and abscesses or bites), and those of the gastrointestinal flora predominated in infections that originated from that site (ie, peritonitis, abdominal abscesses, decubitus ulcers). This study showed the polymicrobial nature of many infections that follow trauma.
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