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  • 标题:Serotyping, Antibiotic Susceptibility and Related Risk Factors Aspects of Nasopharyngeal Carriage of Streptococcus pneumoniae in Healthy School Students
  • 作者:Hamed MIRZAEI GHAZIKALAYEH ; Rezvan MONIRI ; Seyed Gholam Abbas MOOSAVI
  • 期刊名称:Iranian Journal of Public Health
  • 印刷版ISSN:2251-6085
  • 电子版ISSN:2251-6093
  • 出版年度:2014
  • 卷号:43
  • 期号:9
  • 页码:1284-1290
  • 语种:English
  • 出版社:THE SCHOOL OF PUBLIC HEALTH, TEHRAN UNIVERSITY OF MEDICAL SCIENCES
  • 摘要:Background Streptococcus pneumoniae is an important problem worldwide and nasopharyngeal colonization plays significant role in pneumococcal infections. The aims of this study were to determine the nasopharyngeal colonization rate, serotyping, antibiotics susceptibility and study the risk factors for nasopharyngeal colonization with S. pneumoniae in students in Kashan, Iran. Methods A cross-sectional study was conducted on children aged 7 to 19 years from December 2011 to November 2012. Nasopharyngeal swabs were plated onto brain heart infusion agar plates with 5% sheep blood and 4µg/ml of gentamycin. Antimicrobial susceptibility profiles were determined on Mueller-Hinton agar in accordance with CLSI. S. pneumoniae strains were investigated for the presence of the most common pneumococcal serotypes using a multiplex polymerase chain reaction. Results 13.9% were found to be carriers. The most prevalent serogroups were 19F (30%), 6A/B (18.9%), 15A (16.5%), 11 (11.3%), 23F (8.2%), 1 (6.2%), 19A (3.4%), and 35B (2.4%). Nine strains (3.1%) were non-typeable. The carrier rate was significantly higher in 12 to15 year old age group. Upper respiratory tract infections within the last month (OR=1.5, P <0.011), previous hospitalization (OR=1.6, P <0.001), previous antibiotic usage last two weeks (OR=1.89, P <0.001), rhinorea (OR=1.9 P <0.001), male sex (OR=3.5 P < 0.001) and passive smoking (OR=1.56, P < 0.001) have been determined to be risk factors for S. pneumoniae carriage. The highest pneumococcal resistance was to tetracycline (25.4%). All strains were susceptible to linezolid and levofloxacin. Conclusion Our information leads to an important source to screen the future impact of pneumococcal vaccination on bacterial colonization.
  • 关键词:Streptococcus pneumoniae ; Nasopharygeal; Serogroup; Antibiotic resistance
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