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  • Diversity of Group B Streptococcus Serotypes Causing Urinary Tract Infection in Adults

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    Author(s)
    Ulett, Kimberly B
    Benjamin, William H
    Zhuo, Fenglin
    Xiao, Meng
    Kong, Fanrong
    Gilbert, Gwendolyn L
    Schembri, Mark A
    Ulett, Glen C
    Griffith University Author(s)
    Ulett, Glen C.
    Year published
    2009
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    Abstract
    Serotypes of group B streptococcus (GBS) that cause urinary tract infection (UTI) are poorly characterized. We conducted a prospective study of GBS UTI in adults to define the clinical and microbiological characteristics of these infections, including which serotypes cause disease. Patients who had GBS cultured from urine over a 1-year period were grouped according to symptoms, bacteriuria, and urinalysis. Demographic data were obtained by reviewing medical records. Isolates were serotyped by latex agglutination and multiplex PCR-reverse line blotting (mPCR/RLB). Antibiotic susceptibilities were determined by disc diffusion. ...
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    Serotypes of group B streptococcus (GBS) that cause urinary tract infection (UTI) are poorly characterized. We conducted a prospective study of GBS UTI in adults to define the clinical and microbiological characteristics of these infections, including which serotypes cause disease. Patients who had GBS cultured from urine over a 1-year period were grouped according to symptoms, bacteriuria, and urinalysis. Demographic data were obtained by reviewing medical records. Isolates were serotyped by latex agglutination and multiplex PCR-reverse line blotting (mPCR/RLB). Antibiotic susceptibilities were determined by disc diffusion. GBS was cultured from 387/34,367 consecutive urine samples (1.1%): 62 patients had bacteriuria of >107 CFU/liter and at least one UTI symptom; of these patients, 31 had urinary leukocyte esterase and pyuria (others not tested), 50 (81%) had symptoms consistent with cystitis, and 12 (19%) had symptoms of pyelonephritis. Compared with controls (who had GBS isolated without symptoms), a prior history of UTI was an independent risk factor for disease. Increased age was also significantly associated with acute infection. Serotyping results were consistent between latex agglutination and mPCR/RLB for 331/387 (85.5%) isolates; 22 (5.7%) and 7 (1.8%) isolates were nontypeable with antisera and by mPCR/RLB, respectively; and 45/56 (80.4%) isolates with discrepant results were typed by mPCR/RLB as belonging to serotype V. Serotypes V, Ia, and III caused the most UTIs; serotypes II, Ib, and IV were less common. Nontypeable GBS was not associated with UTI. Erythromycin (39.5%) and clindamycin (26.4%) resistance was common. We conclude that a more diverse spectrum of GBS serotypes causes UTI than previously recognized, with the exception of nontypeable GBS.
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    Journal Title
    Journal of Clinical Microbiology
    Volume
    47
    Issue
    7
    Publisher URI
    http://jcm.asm.org/
    DOI
    https://doi.org/10.1128/JCM.00154-09
    Copyright Statement
    © 2009 American Society of Microbiology. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Biological sciences
    Agricultural, veterinary and food sciences
    Biomedical and clinical sciences
    Medical bacteriology
    Publication URI
    http://hdl.handle.net/10072/27675
    Collection
    • Journal articles

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