BACKGROUND: The Streptococcus pneumoniae polysaccharide capsule may be related to invasive pneumococcal disease (IPD) course. METHODS: We performed a retrospective cohort study with nationally representative surveillance data from 1075 hospitalized patients with IPD from the Netherlands from 1 June 2004 through 31 May 2006 in the prevaccination era. Serotypes were grouped according to invasive disease potential, rate of the most serious clinical syndromes of meningitis and bacteremia without focus, and case-fatality rates. Multivariable logistic regression analysis was performed to obtain odds ratios adjusted for baseline confounders for the association of serotypes and these outcomes, using the serotypes with the lowest rates as reference. RESULTS: IPD caused by serogroups with low invasive disease potential concerned meningitis or bacteremia without focus in 22% of cases, and 74% of patients had an underlying comorbidity. For highly invasive serogroups these figures were 10% (P < .01) and 56% (P < .01). Individual serotypes varied in the relative rate by which they caused meningitis or bacteremia without focus. Compared with the reference group composed of serotypes 1, 5, 7F, 15B, 20, and 33F, the group of serotypes 3, 19F, 23A, 16F, 6B, 9N, and 18C was associated with increased case-fatality rates (group adjusted odds ratio, 2.6; 95% confidence interval, 1.5-4.7). CONCLUSIONS: The serotype appeared to be independently associated with IPD severity in adults, which indicates that careful monitoring of IPD after implementation of conjugate vaccines is necessary.
BACKGROUND: The Streptococcus pneumoniaepolysaccharide capsule may be related to invasive pneumococcal disease (IPD) course. METHODS: We performed a retrospective cohort study with nationally representative surveillance data from 1075 hospitalized patients with IPD from the Netherlands from 1 June 2004 through 31 May 2006 in the prevaccination era. Serotypes were grouped according to invasive disease potential, rate of the most serious clinical syndromes of meningitis and bacteremia without focus, and case-fatality rates. Multivariable logistic regression analysis was performed to obtain odds ratios adjusted for baseline confounders for the association of serotypes and these outcomes, using the serotypes with the lowest rates as reference. RESULTS: IPD caused by serogroups with low invasive disease potential concerned meningitis or bacteremia without focus in 22% of cases, and 74% of patients had an underlying comorbidity. For highly invasive serogroups these figures were 10% (P < .01) and 56% (P < .01). Individual serotypes varied in the relative rate by which they caused meningitis or bacteremia without focus. Compared with the reference group composed of serotypes 1, 5, 7F, 15B, 20, and 33F, the group of serotypes 3, 19F, 23A, 16F, 6B, 9N, and 18C was associated with increased case-fatality rates (group adjusted odds ratio, 2.6; 95% confidence interval, 1.5-4.7). CONCLUSIONS: The serotype appeared to be independently associated with IPD severity in adults, which indicates that careful monitoring of IPD after implementation of conjugate vaccines is necessary.
Authors: Suzan P van Mens; Sabine C A Meijvis; Henrik Endeman; Heleen van Velzen-Blad; Douwe H Biesma; Jan C Grutters; Bart J M Vlaminckx; Ger T Rijkers Journal: Clin Vaccine Immunol Date: 2011-03-02
Authors: Juliana Caierão; Paulina Hawkins; Fernando Hayashi Sant'anna; Gabriela Rosa da Cunha; Pedro Alves d'Azevedo; Lesley McGee; Cícero Dias Journal: PLoS One Date: 2014-10-30 Impact factor: 3.240
Authors: Chengxin Li; Katarzyna A Duda; Pernille L Elverdal; Ian C Skovsted; Christian Kjeldsen; Jens Ø Duus Journal: J Bacteriol Date: 2019-09-20 Impact factor: 3.490
Authors: Karen L Ciprero; Rocio D Marchese; Patrick Richard; Martine Baudin; Tina M Sterling; Susan B Manoff; David Radley; Jon E Stek; Benoît Soubeyrand; John D Grabenstein; Sandrine I Samson; Luwy K Musey Journal: Hum Vaccin Immunother Date: 2016-03-22 Impact factor: 3.452