Molecular epidemiology of pediatric pneumococcal empyema from 2001 to 2007 in Utah.
J Clin Microbiol
; 48(2): 520-5, 2010 Feb.
Article
em En
| MEDLINE
| ID: mdl-20018815
ABSTRACT
Utah had a high rate of pediatric pneumococcal empyema (PPE) prior to licensure of the pneumococcal conjugate vaccine (PCV-7) in 2000. The majority (62%) of PPE cases was due to nonvaccine serotypes, primarily Streptococcus pneumoniae serotype 1, multilocus sequence type (MLST) 227. PPE in Utah children has increased over the last decade. It is unclear whether the increase was due to serotype replacement or switch. In this study, we describe the incidence and molecular epidemiology of PPE by MLST in Utah children after the licensure of PCV-7. Empyema rates increased from 8.5/100,000 children in the state of Utah in 2001 to 12.5/100,000 children in 2007 (P = 0.006). Ninety-eight percent was due to nonvaccine serotypes (P < 0.001 when compared to the pre-PCV-7 period). PPE was primarily due to serotypes 1, 3, 19A, and 7F, with MLST demonstrating sequence types (ST) that were commonly present in the United States prior to licensure of PCV-7. Serotype switch was not documented. Replacement disease with common ST of serotypes 1,3, 7F, and 19A rather than serotype switch was responsible for the increase in PPE in Utah children.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Infecções Pneumocócicas
/
Streptococcus pneumoniae
/
Empiema
Tipo de estudo:
Incidence_studies
/
Prognostic_studies
/
Screening_studies
Limite:
Child
/
Child, preschool
/
Humans
País/Região como assunto:
America do norte
Idioma:
En
Revista:
J Clin Microbiol
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Estados Unidos