Emergence of antibiotic-resistant pneumococcal serotypes causing invasive pneumococcal disease in children, Spain.

Diversity of Serotype Replacement After Pneumococcal Conjugate Vaccine Implementation in Europe

IntroductionThe aim of this study is to analyse the impact of vaccination of infants with pneumococcal conjugate vaccine (PCV) on the incidence of invasive pneumococcal disease (IPD) in children under 5 years of age in the Czech Republic.Material and methodsThe present study includes all IPD cases reported in children aged 0–4 years within the surveillance program in 2007–2017. The impact of PCV is analysed for five categories of IPD: cases caused by all serotypes, cases caused by PCV7 serotypes (4, 6B, 9V, 14, 18C, 19F, and 23F), cases caused by three additional PCV10 serotypes (1, 5, and 7F), cases caused by three additional PCV13 serotypes (3, 6A, and 19A), and cases caused by non-PCV serotypes. To assess the impact of PCV, the study period was divided into the pre-vaccination period 2007–2008 and post-vaccination period 2009–2017, which was divided into three three-year parts: 2009–2011, 2012–2014, and 2015–2017. Analysis of differences between periods was based on the Poisson regression model where the population numbers were handled as an offset.ResultsThe annual incidence of IPD in children under 5 years of age caused by all serotypes has had a downward trend since 2007: it dropped from 8.52/100 000 in 2007 to 2.67/100 000 in 2017, with slight increases in 2010 and 2013. All three post-vaccination periods show significantly lower (p<0.001) incidences in comparison to the pre-vaccination period, but they do not statistically significantly differ from each other.ConclusionsIPD surveillance data in the Czech Republic show that after the introduction of PCV vaccination of infants, there has been a significant decrease in the IPD incidence of children under 5 years of age. Continued IPD surveillance is essential to monitor for possible post-vaccination serotype replacement.

Research Article| November 01 2017 Invasive Pneumococcal Disease in Children With Sickle Cell Anemia AAP Grand Rounds (2017) 38 (5): 57. https://doi.org/10.1542/gr.38-5-57 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Invasive Pneumococcal Disease in Children With Sickle Cell Anemia. AAP Grand Rounds November 2017; 38 (5): 57. https://doi.org/10.1542/gr.38-5-57 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search toolbar search search input Search input auto suggest filter your search All PublicationsAll JournalsAAP Grand RoundsPediatricsHospital PediatricsPediatrics In ReviewNeoReviewsAAP NewsAll AAP Sites Search Advanced Search Topics: invasive pneumococcal disease, sickle cell anemia Source: Martin OO, Moquist KL, Hennessy JM, et al. Invasive pneumococcal disease in children with sickle cell disease in the pneumococcal conjugate vaccine era. Pediatr Blood Cancer. 2017 4 July [published online ahead of print]; doi: https://doi.org/10.1002/pbc.26713Google Scholar Investigators from Michigan State University, Flint, MI, and Children’s Hospitals and Clinics of Minnesota (CHCM), Minneapolis, MN, conducted a retrospective study to assess trends in invasive pneumococcal disease (IPD) among children with sickle cell disease (SCD) in the era of universal pneumococcal immunization for young children. For the study, they reviewed medical records and microbiological databases at CHCM to identify cases of IPD in children with SCD between 2000 and 2014. IPD was defined as the presence of pneumococcus in a blood or cerebrospinal fluid culture. Data collected on study patients included age, pneumococcal immunization status, pneumococcus serotype, and penicillin susceptibility. On the basis of the number of cases identified and the population of patients with SCD followed up at CHCM, the investigators estimated the incidence of IPD per 100,000 person-years among children with SCD. In addition to describing clinical characteristics of cases of IPD over the entire study period, observations were divided into 2 periods on the basis of the type of pneumococcal conjugate vaccine available. Thus, in period 1, 2000–2010, the pneumococcal conjugate vaccine (PCV) against 7 serotypes (PCV7) was available, and in period 2, 2010–2014, the 13-valent PCV (PCV13) was used. During the overall study period, 11 cases of IPD in patients with SCD were identified, including 7 in period 1 and 4 in period 2. The mean age of study patients was 5 years, with a range of 6 months to 11 years. Two children with IPD died; information on pneumococcus serotype was available for the remaining 9 patients. PCV data were available for 8 of these 9 children, and data for all 8 were classified as being up to date. During period 1, all cases of IPD were caused by serotypes of pneumococcus not included in PCV7; during period 2, 1 patient (an 8-year-old boy) had IPD caused by serotype 7F (included in PCV13 but not PCV7). All isolates tested (n = 9) were sensitive to penicillin. The overall incidence of IPD in children with SCD in this study was estimated at 417 per 100,000 patient-years, with an incidence of 390 per 100,000 patient-years in period 1 and 450 per 100,000 patient-years in period 2. The authors conclude that even in the era of universal pneumococcal immunization, children with SCD remain at risk for IPD. Dr Winer has disclosed no financial relationship relevant to this commentary. This commentary does not contain a discussion of an unapproved/investigative use of a commercial product/device. When considering a prophylactic intervention, one must take into account both the burden of the potential disease and the effect of the proposed intervention. In this brief report, the authors argue for both penicillin and PCV prophylaxis in patients with SCD <5 years of age, which is the... You do not currently have access to this content.

Effectiveness of the 13-valent pneumococcal conjugate vaccine against invasive pneumococcal disease in South African children: a case-control study.

Pneumococcal conjugate vaccines (PCVs) are highly effective in preventing invasive pneumococcal diseases (IPD) in children, including those with sickle cell disease (SCD). A systematic review of the English literature published between 2000 and 2017 was undertaken to evaluate the serotype distribution, clinical presentation and outcomes of IPD in children with SCD in PCV programmes. We identified 475 potential studies and included 16 publications, involving 9438 children up to 22years of age with SCD and 182 IPD episodes (prevalence, 1·9%. 95% confidence interval [CI], 1·7-2·2%). Septicaemia was the most prevalent clinical presentation (84/137; 61%) followed by lower respiratory tract infection (39/137; 29%) and meningitis (12/137, 9%). More than half the serotypes associated with IPD (88/148; 59·5%) were not included in the 13-valent PCV; of these, 54% (44/82) were due to serogroup 15. The crude case fatality rate was 11·5% (21/182 cases; 95% CI, 7·3-17·1%). Most cases of IPD in children with SCD were due to serotypes that are not included in any of the licensed PCVs. IPD in children with SCD remains associated with high morbidity and mortality, highlighting the importance of strict adherence to daily penicillin prophylaxis. Until a serotype-independent pneumococcal vaccine becomes available, higher-valent PCVs should include serogroup 15 to protect this highly vulnerable group of children.

Long-term surveillance of the effect of PCV13: the future challenge in Africa

Global Pneumococcal Disease and Policies for Control

Invasive pneumococcal disease in children under 16 years of age: Incomplete rebound in incidence after the maximum effect of PCV13 in 2012/13 in Germany

The 13-valent pneumococcal conjugate vaccine (PCV13) was licensed in the United States in 2010. We describe invasive pneumococcal disease (IPD) in children at 8 children's hospitals in the US from 2014 to 2017. Children with IPD occurring from 2014 to 2017 were identified from a prospective study. Demographic and clinical data, including results of any immune evaluation along with the number and dates of previous pneumococcal conjugate vaccines administered, were recorded on case report forms. Isolate serotypes were determined in a central laboratory. Pneumococcal conjugate vaccine doses were counted if IPD occurred ≥2 weeks after a dose. PCV13 serotypes accounted for 23.9% (115 out of 482) of IPD isolates from 2014 to 2017. Serotypes 3, 19A, and 19F accounted for 91% of PCV13 serotypes. The most common non-PCV13 serotypes were 35B, 23B, 33F, and 22F. An underlying condition was significantly (P < .0001) more common in children with IPD due to non-PCV13 serotypes (200 out of 367, 54.5%) than for children with PCV13 serotypes (27 out of 115, 23.5%). An immune evaluation was undertaken in 28 children who received ≥2 PCV13 doses before IPD caused by a PCV13 serotype. Only 1 was found to have an immunodeficiency. PCV13 serotypes (especially serotypes 3, 19A, and 19F) continue to account for nearly a quarter of IPD in US children 4 to 7 years after PCV13 was introduced. Underlying conditions are more common in children with non-PCV13 serotype IPD. Immune evaluations in otherwise healthy children with PCV13 serotype IPD despite receiving ≥2 PCV13 doses did not identify an immunodeficiency.

Since the introduction of childhood pneumococcal conjugate vaccines, invasive pneumococcal disease (IPD) incidence has decreased in children and the predominant serotypes causing disease have changed. This study describes changes in the clinical features of IPD in children (<18 years) before and after the conjugate vaccine introduction. The Calgary Area Streptococcus pneumoniae Epidemiology Research study collects information on all IPD cases in Calgary, Alberta, Canada. Descriptive and regression analyses were used to compare IPD in the pre-vaccine (January 2000 to August 2002), post-7-valent protein-polysaccharide conjugate vaccine (September 2002 to June 2010) and post-13-valent protein-polysaccharide conjugate vaccine (PCV13) (July 2010 to December 2015) periods; intensive care unit and inpatient admissions were outcome measures. The incidence of IPD in children (<18 years) decreased from an average of 17 cases/100,000/yr in 2000-2001 to 4 cases/100,000/yr in 2015. The median age of children presenting with IPD shifted from 2.0 years (interquartile range: 2.5) in the pre-vaccine period to 3.9 years (interquartile range: 6.2) in the post-PCV13 period. The proportion of children with a comorbidity that is an indication for pneumococcal vaccination did not change. Invasive disease with focus (meningitis, pneumonia, empyema, peritonitis) compared with invasive disease with bacteremia only increased from 44.6% in pre-vaccine to 64.0% and 61.4% in the post-7-valent protein-polysaccharide conjugate vaccine and post-PCV13 periods, respectively (P = 0.017). Having IPD in the post-PCV13 period compared with the pre-vaccine period was associated with an increased odds of hospitalization [Odds ratio (OR): 2.9; 95% Confidence Interval (CI): 1.4-6.2]. Clinical features of IPD have changed since pneumococcal conjugate vaccines were introduced, with a shift toward more focal infections requiring hospitalization. Although overall IPD cases have declined, disease that does occur appears to be more severe.

Pneumococcal conjugate vaccines (PCVs) have substantially reduced morbidity and mortality of pneumococcal disease. The impact of the 7-valent PCV on all-serotype invasive pneumococcal disease (IPD) among children was reported to vary between high-income countries. We investigate the ability to predict this heterogeneity from pre-vaccination data. We propose a parsimonious model that predicts the impact of PCVs from the odds of vaccine serotype (VT) among carriers and IPD cases in the pre-PCV period, assuming that VT are eliminated in a mature PCV programme, that full serotype replacement occurs in carriage and that invasiveness of the NVT group is unchanged. We test model performance against the reported impact of PCV7 on childhood IPD in high-income countries from a recent meta-analysis. The odds of pre-PCV7 VT IPD, PCV schedule, PCV coverage and whether a catch up campaign was used for introduction was gathered from the same analysis. We conducted a literature review and meta-analysis to obtain the odds of pre-PCV7 VT carriage in the respective settings. The model predicted the reported impact on childhood IPD of mature PCV programmes; the ratio of predicted and observed incidence risk ratios was close to 1 in all settings. In the high income settings studied differences in schedule, coverage, and catch up campaigns were not associated with the observed heterogeneity in impact of PCV7 on childhood all-serotype IPD. The pre-PCV7 proportion of VT IPD alone also had limited predictive value. The pre-PCV7 proportion of VT carriage and IPD are the main determinants for the impact of PCV7 on childhood IPD and can be combined in a simple model to provide predictions of the vaccine preventable burden of IPD.

To describe the epidemiology of invasive pneumococcal disease in children under 5 years of age in Far North Queensland and to examine the potential impact of a seven- and 11-valent conjugate pneumococcal vaccine. A review of all cases of invasive pneumococcal disease in children under 5 years of age in Far North Queensland over a 9 year period (1992-2000). The distribution of the serotypes of isolates causing invasive pneumococcal disease was compared with the serotypes contained in the two vaccines. The annual incidence in indigenous and non-indigenous children under 5 years of age was 163 (95% confidence interval (CI) 122-213) and 42 (95% CI 31-55) cases per 100 000 children, respectively. For children under 2 years of age, these figures were 297 (95% CI 208-411) and 71 (95% CI 49-100), respectively. There was a greater variety of serotypes isolated from indigenous children (n=17) than from non-indigenous children (n=9; P < 0.01). The serotypes within the seven-valent vaccine accounted for 62% (95% CI 46-75%) and 88% (95% CI 76-95%) of the isolates from indigenous and non-indigenous children, respectively (P < 0.01). Serotypes within the 11-valent vaccine accounted for 72% (95% CI 57-84%) of the isolates from indigenous children under 5 years of age, but did not account for any extra isolates from non-indigenous children. Although the seven- and 11-valent conjugate pneumococcal vaccines cover only approximately 60 and 70%, respectively, of the isolates that cause invasive disease in indigenous children in Far North Queensland, they nevertheless have the potential to prevent much morbidity in and hospitalization of these children. It will be essential to maintain surveillance following the introduction of conjugate pneumococcal vaccines so as to monitor changes in the incidence of invasive pneumococcal disease, particularly in high-risk children.

Community-Acquired Pneumonia Incidence in Adults Aged 18 Years and Older in Goto City, Japan: A Prospective Population-Based Study

Impact of pneumococcal conjugate vaccines on burden of invasive pneumococcal disease and serotype distribution of Streptococcus pneumoniae isolates: An overview from Kuwait

Effect of high-valency pneumococcal conjugate vaccines on invasive pneumococcal disease in children in SpIDnet countries: an observational multicentre study