Microbial profile and antibiotic susceptibility of culture-positive bacterial endophthalmitis

Microbial profile and antibiotic susceptibility of culture-positive bacterial endophthalmitis

Author Melo, G. B. Autor UNIFESP Google Scholar
Bispo, Paulo José Martins Autor UNIFESP Google Scholar
Yu, Maria Cecilia Zorat Autor UNIFESP Google Scholar
Pignatari, A. C. C. Autor UNIFESP Google Scholar
Hoefling-Lima, A. L. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Purpose To assess the distribution of microorganisms isolated from patients with bacterial endophthalmitis and their antimicrobial susceptibility.Methods Retrospective analysis of medical and microbiological records of patients with suspected diagnosis of endophthalmitis. the following information was assessed: number of presumed and culture-positive endophthalmitis cases, source of infection, microbiological result (aqueous and/or vitreous culture and Gram staining), microbial characterization and distribution, and antimicrobial susceptibility.Results A total of 107 (46%) of 231 patients with bacterial endophthalmitis showed positive results by gram stain or culture. of these, 97 (42%) patients were positive for culture only. Most of them (62%) were secondary to a surgical procedure (postoperative), 12% were posttraumatic and 26% were secondary to an unknown source or the data were unavailable. A total of 100 microorganisms were isolated (38 aqueous and 67 vitreous samples) from the 97 culture-positive cases (91% were gram-positive and 9% were gram-negative). Coagulase-negative Staphylococcus (CoNS) (48%) were the most frequently isolated, followed by Stretococcus viridans (18%), and Staphylococcus aureus (13%). the antimicrobial susceptibility for CoNS was as follows: amikacin-91.6%, cephalothin-97.9%, ceftriaxone-50%, ciprofloxacin-62.5%, chloramphenicol-91.8%, gatifloxacin-79.5%, gentamicin-72.9%, moxifloxacin-89.5%, ofloxacin-70.8%, oxacillin-58.3%, penicillin-33.3%, tobramycin-85.4%, and vancomycin-100%.Conclusion Gram-positive bacteria were the major causes of infectious endophthalmitis in this large series, usually following surgery. CoNS was the most common isolate. of interest, susceptibility to oxacillin and fourth-generation quinolones was lower than previously published. Eye (2011) 25, 382-388; doi:10.1038/eye.2010.236; published online 18 February 2011
Keywords endophthalmitis
microbial
antibiotic susceptibility
laboratory investigation
Language English
Date 2011-03-01
Published in Eye. London: Nature Publishing Group, v. 25, n. 3, p. 383-387, 2011.
ISSN 0950-222X (Sherpa/Romeo, impact factor)
Publisher Nature Publishing Group
Extent 383-387
Origin http://dx.doi.org/10.1038/eye.2010.236
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000288240500016
URI http://repositorio.unifesp.br/handle/11600/33488

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