In vitro antibiotic susceptibilities of ocular bacteria isolates from the cornea and conjunctiva to moxifloxacin, gatifloxacin and other fluoroquinolones Testes de sensibilidade antimicrobiana de bactérias isoladas da córnea e da conjuntiva à moxifloxacina, gatifloxacina e outras fluoroquinolonas

PURPOSE: To assess and compare the in vitro susceptibility of ocular bacterial isolates to fluoroquinolones, including moxifloxacin and gatifloxacin. METHODS: A total of 154 bacterial ocular isolates from keratitis and conjunctivitis were tested for sensitivity to the studied antibiotics, using the...

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Main Authors: Ana Luisa Höfling-Lima, Rubens Belfort Jr, Cecília Tobias Aguiar Moeller, Bruno Castelo Branco, Luciene Barbosa de Sousa, Denise de Freitas
Format: Article
Language:English
Published: Conselho Brasileiro de Oftalmologia 2004-12-01
Series:Arquivos Brasileiros de Oftalmologia
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Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492004000600007
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Summary:PURPOSE: To assess and compare the in vitro susceptibility of ocular bacterial isolates to fluoroquinolones, including moxifloxacin and gatifloxacin. METHODS: A total of 154 bacterial ocular isolates from keratitis and conjunctivitis were tested for sensitivity to the studied antibiotics, using the disk diffusion method. RESULTS: Of the 51 corneal isolates, 46 (90.2%) were sensitive to ciprofloxacin, 45 (88.2%) to ofloxacin and 41 (80.4%) to lomefloxacin. All corneal isolates were sensitive to moxifloxacin and gatifloxacin. Of the 103 bacterial conjunctival isolates, 101 (98.1%) and 103 (100%) were sensitive to gatifloxacin and moxifloxacin, respectively. Two strains of Streptococcus sp viridans group were resistant to gatifloxacin. A total of 82 (79.6%) specimens were sensitive to lomefloxacin, 89 (86.4%) and 96 (93.2%) to ciprofloxacin and ofloxacin, respectively. CONCLUSION: Fourth generation fluoroquinolones, herein exemplified by moxifloxacin and gatifloxacin, seem to be more effective than previous generation fluoroquinolones against frequently encountered organisms isolated from patients with bacterial keratitis and conjunctivitis.<br>OBJETIVOS: Conhecer e comparar a susceptibilidade in vitro de bactérias isoladas do olho à fluoroquinolonas, incluindo moxifloxacina e gatifloxacina. MÉTODOS: Um total de 154 bactérias isoladas de ceratites e conjuntivites foram submetidas a testes de sensibilidade antimicrobiana aos antibióticos usando o método de difusão em disco. RESULTADOS: Das 51 bactérias isoladas da córnea, 46 (90,2%) foram sensíveis a ciprofloxacina, 45 (88,2%) a ofloxacina e 41 (80,4%) a lomefloxacina. Todas as bactérias isoladas da córnea foram sensíveis a moxifloxacina e a gatifloxacina. Das 103 bactérias isoladas da conjuntiva 101 (98,1%) e 103 (100%) foram sensíveis a gatifloxacina e moxifloxacina, respectivamente. Duas cepas de Streptococcus sp do grupo viridans mostraram-se resistentes à gatifloxacina. Um total de 82 (79,6%) espécimes foi sensível a lomefloxacina, 89 (86,4%) e 96 (93,2%) a ciprofloxacina e ofloxacina, respectivamente. CONCLUSÕES: As quinolonas de 4ª geração, aqui exemplificadas pela moxifloxacina e gatifloxacina, apresentam eficácia antimicrobiana maior do que a ciprofloxacina, ofloxacina e lomefloxacina contra os organismos freqüentemente isolados em pacientes com infecções bacterianas da córnea e da conjuntiva.
ISSN:0004-2749
1678-2925