Have changing pneumococcal vaccination programmes impacted disease in Ontario?
Vaccine
; 31(24): 2680-5, 2013 May 31.
Article
em En
| MEDLINE
| ID: mdl-23597716
ABSTRACT
BACKGROUND:
Publicly funded infant 7-valent pneumococcal conjugate vaccine (PCV7) was introduced in Ontario, Canada in 2005 and was replaced by 10- and 13-valent vaccines (PCV10, PCV13) in October 2009 and November 2010, respectively. Among adults ≥ 65 years, a 23-valent polysaccharide vaccine (PPV23) has been universally available since 1996. In January 2012, PCV13 was approved for adults ≥ 50 years. This study examines the impact of publicly funded vaccination programmes on invasive pneumococcal disease (IPD).METHODS:
Laboratory data from population-based surveillance for IPD conducted at the Toronto Invasive Bacterial Disease Network and from Public Health Ontario Laboratories between January 1, 2008 and December 31, 2010 were analyzed.RESULTS:
Between 2008 and 2010 there were 3259 cases of IPD; overall incidence was 7.4/9.3/8.3 per 100,000 in 2008/9/10, respectively. Incidence increased significantly among adults 65+ years during the period; this group had the highest incidence (21.5-25.6/100,000). The second highest incidence in 2008 and 2009 was in infants <1 year, whereas in 2010 it was in children 1-4 years. Among children <5 years, 68% and 19% of serotypes were covered by PCV13 and PCV10, respectively, between 2008 and 2010. In 2009, 6 cases with the 3 additional PCV10 serotypes were reported in infants compared with 2 in 2010. Among persons eligible for PCV7 (born≥2004), there was a 77% decrease in the rate of IPD due to PCV7 serotypes between 2008 and 2010 and a 60% decrease in PCV7 serotypes among persons not vaccine-eligible (born<2004). There was a 15% difference in serotype coverage between PCV13 and the 23-valent polysaccharide vaccine in adults≥50 years.CONCLUSIONS:
During Ontario's PCV7 programme, serotype-specific decreases in IPD were observed, suggesting vaccine programme success, including herd immunity. Our results also suggest some early impact among infants from PCV10 introduction. A substantial burden of disease was also observed among older adults.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Infecções Pneumocócicas
/
Streptococcus pneumoniae
/
Vacinas Pneumocócicas
Tipo de estudo:
Incidence_studies
/
Prognostic_studies
/
Screening_studies
Limite:
Adult
/
Aged
/
Aged80
/
Child
/
Child, preschool
/
Humans
/
Infant
/
Male
/
Middle aged
País como assunto:
America do norte
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article