title: Serotype and genotype distribution among invasive Streptococcus pneumoniae isolates in Colombia, 2005-2010.
abstract: In Colombia, a laboratory-based surveillance of invasive Streptococcus pneumoniae isolates as part of SIREVA II PAHO has been conducted since 1994. This study describes the serotype distribution, antimicrobial resistance, and genetic relationships of pneumococcal isolates recovered in Colombia from 2005 to 2010. In this study, demographic data of invasive S. pneumoniae isolates were analyzed, and antimicrobial susceptibility patterns were determined. Pulse field gel electrophoresis (n = 629) and multilocus sequence typing (n = 10) were used to determine genetic relationship of isolates with minimal inhibitory concentration to penicillin ≥0.125 µg/mL. A total of 1775 isolates of S. pneumoniae were obtained. Fifteen serotypes accounted for 80.7% of isolates. Serotype 14 (23.1%) was the most frequent in the general population. Penicillin resistance was 30.7% in meningitis and 9.0% in non-meningitis. Clones Spain(6B)ST90, Spain(9V)ST156, Spain(23F)ST81, and Colombia(23F)ST338 were associated to isolates. Additionally, serotype 6A isolates were associated with ST460 and ST473, and 19A isolates with ST276, ST320, and ST1118. In conclusion, the surveillance program provided updated information of trends in serotype distribution, antimicrobial resistance and the circulation of clones in invasive pneumococcal diseases. These results could be helpful to understand the epidemiology of S. pneumoniae in Colombia, and provide a baseline to measure the impact of vaccine introduction.
authors.affiliation: Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, Colombia.
authors.forename: Eliana L
authors.initials: EL
authors.lastname: Parra
authors.affiliation: Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, Colombia.
authors.forename: Viviana
authors.initials: V
authors.lastname: Ramos
authors.affiliation: Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, Colombia.
authors.forename: Olga
authors.initials: O
authors.lastname: Sanabria
authors.affiliation: Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, Colombia.
authors.forename: Jaime
authors.initials: J
authors.lastname: Moreno
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D003105:Colombia / Q000453:epidemiology; D016521:Electrophoresis, Gel, Pulsed-Field; D062665:Epidemiological Monitoring; D005260:Female; D005838:Genotype; D006801:Humans; D007223:Infant; D008297:Male; D016920:Meningitis, Bacterial / Q000188:drug therapy / Q000453:epidemiology* / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D058885:Multilocus Sequence Typing; D010403:Penicillin Resistance / Q000187:drug effects / Q000235:genetics; D010406:Penicillins / Q000627:therapeutic use; D011008:Pneumococcal Infections / Q000188:drug therapy / Q000453:epidemiology* / Q000382:microbiology; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000187:drug effects / Q000235:genetics* / Q000302:isolation & purification / Q000472:pathogenicity*; D014774:Virulence
chemical_list: D000900:Anti-Bacterial Agents; D010406:Penicillins