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Published on: February 23, 2014
Multidrug-resistant pneumococci (serotype 8) causing invasive disease in HIV+ patients
J C Sanz1, E Cercenado, M Marín
1Unidad de Microbiología Clínica, Laboratorio Regional de Salud Pública de Comunidad de Madrid, Madrid, Spain.
Abstract:
From July 2007 to June 2009, all pneumococci causing invasive pneumococcal disease in our hospital were serotyped. Antimicrobial susceptibility was determined by microdilution. Molecular typing was performed by pulsed-field gel electrophoresis and by multilocus sequence typing. Among 251 invasive pneumococci, serotype 8 was the most frequent (13.5%). All serotype 8 strains were susceptible to penicillin; however, 61.8% (21/34) were co-resistant to erythromycin, levofloxacin and tetracycline and identical to the Sweden(15A) -ST63 clone. Serotype 8 was significantly more frequent among human immunodeficiency virus (HIV)-infected patients (36.5%). The high prevalence of this non-conjugate vaccine multiresistant serotype 8 is a cause for concern mainly in HIV-infected patients.
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