Summary:
Study objective: To assess the incidence of invasive pneumococcal disease and coverage of the
causative serotypes by pneumococcal vaccines in the Czech Republic.
Methods: The incidence and fatality rates of reported cases of pneumococcal meningitis (EPIDAT)
in 1997-2006 are analyzed. In addition, the data of the National Reference Laboratory for
Streptococci and Enterococci from 2000-2006 are presented. The incidence of invasive
pneumococcal disease was calculated for the catchment population of the collaborating
laboratories. Pneumococcal typing was performed in the National Reference Laboratory. The
percentages of pneumococcal serotypes isolated from invasive disease in 2000-2006 and included
in the pneumococcal vaccines were calculated.
Results: The incidence of invasive pneumococcal disease ranged from 2.30 to 4.28/100 000
population. The age-specific incidence of invasive pneumococcal disease in 2000-2006 was the
highest in the lowest age groups 0-11 months (15.75/100 000) and 1-4 years (8.22/100 000), followed
by the age group of 65 years and older (7.3/100 000). The total fatality rate of pneumococcal
meningitis in 1997-2006 was 13.7 %. The highest age-specific fatality rate was recorded in 65-year
olds and over (24 %). In the age group 0-11 months, the coverage of pneumococcal serotypes is 66 %
by the 7-valent conjugate vaccine, 76 % by the 10-valent conjugate vaccine and 82 % by the13-valent
conjugate vaccine. In the age group 1-4 years, the respective rates are 65.1 %, 76.4 % and 85.8 %.The coverage of serotypes by conjugate vaccines is higher in the youngest age groups (0-11 months
and 1-4 years) compared to adults (40- 64 years and 65 years and older).
Conclusion: Based on laboratory data, the incidence of invasive pneumococcal disease in the
Czech Republic in 2000-2006 is comparable with the rates reported in other European countries.
The highest incidence rates were observed in the youngest age groups. The distribution of
serotypes causing invasive pneumococcal disease differs between children and adults. The
coverage of serotypes by conjugate pneumococcal vaccines is higher in children (66 – 65 %)
compared to adults (34 – 65 %). It is desirable to launch a nationwide programme of surveillance
of invasive pneumococcal disease. Furthermore, it is recommended that a conjugate
pneumococcal vaccine should be included in the children’s immunization schedule.
Key words:
invasive pneumococcal disease – incidence – coverage of serotypes by vaccines –
vaccination strategy.
|