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Revista médica de Chile

versão impressa ISSN 0034-9887

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SOLER V, Tamara; SALAMANCA F, Lucía  e  MOLINA, Eliana. In vitro antimicrobial susceptibility of anaerobic bacteria isolated from pleuropulmonary infections. Rev. méd. Chile [online]. 2006, vol.134, n.4, pp.465-468. ISSN 0034-9887.  http://dx.doi.org/10.4067/S0034-98872006000400009.

Background: Aspirative pleuropulmonary infections are usually caused by anaerobic flora of the mouth, mainly Prevotella, Fusobacterium and Peptostreptococcus spp. Penicillin in high doses is the traditional treatment for this type of infections but the rising resistance developed in recent years has induced the empiric use of clindamycin, increasing treatment costs. Aim: To study antimicrobial susceptibility of anaerobic bacteria isolated from pleuropulmonary infections. Material and methods: Thirty two strains obtained from bronchoalveolar lavage and 15 strains isolated from pleural effusions between 2000 and 2002, were studied. The phenotype of strains was identified using the semiautomated API 20 A method and their susceptibility to penicillin (PNC), clindamycin (CM) and chloramphenicol (CAF) was tested using the E test methods. Results: All the strains were susceptible to CAF, 95% to CM and 74.4% to PNC. The predominant genus was Prevotella, which also exhibited the higher resistance. Conclusions: As CM and CAF are active "in vitro", high rates of clinical response should be expected. In contrast, PNC is less effective, especially against pigmented Prevotella

Palavras-chave : Anti-bacterial agents; bacteria, anaerobic; Drug-resistance, microbial; Prevotella.

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