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Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
Published on: September 11, 2020
[Pneumococcal meningitis in Spanish children: incidence, serotypes and antibiotic resistance. Prospective and
J Casado Flores1, A Fenoll, J Aristegui Fernández
1Hospital Infantil del Niño Jesús, Universidad Autonoma de Madrid, Spain. jcasadof@line-pro.es
Objective:
To determine the incidence, as well as the implicated serotypes and patterns of antibiotic resistance of Streptococcus pneumoniae meningitis in Spanish children.
Material And Method:
We performed a prospective, multicenter study in five Autonomous Communities (Catalonia, Galicia, Madrid, Navarre and the Basque Country) for 1 year (1 February 2000 31 January 2001). All children aged 0-14 years with pneumococcal meningitis from all the hospitals in the Autonomous Communities studied were included. Diagnosis was based on clinical findings and isolation of S. pneumoniae in the cerebrospinal fluid/blood using routine methods or polymerase chain reaction. Serotyping was performed using the guellung reaction and/or immunoblotting and susceptibility to antibiotics was evaluated by the technique of agar dilution. The pediatric population aged 0-14 years in the Autonomous Communities studied comprises 2,290,304 children.
Results:
Fifty-two cases were identified. One patient was aged less than 2 months old, 25 (48 %) were aged 2-12 months, and 12 patients (23 %) were aged 12-24 months. The annual incidence per 100,000 children aged between 1 and 2 years was 17.75 cases (95 % CI: 11.59 26.01) and 8.39 cases (95 % CI: 4.67 15.79) respectively, and that for children in the first 2 and 5 years of life was 13.13 (95 % CI: 9.29 18.02) and 6.29 (95 % CI: 4.57 8.,45) cases respectively. Nearly half the strains isolated (47.6 %) showed reduced sensitivity to penicillin. The most frequent serotype was 19F (12 cases [28.6 %]). Eighty percent of the isolated serotypes were included in the formula of the heptavalent conjugate vaccine.
Conclusions:
The incidence of pneumococcal meningitis in children from five Spanish Autonomous Communities is high, nearly twice that found in a prior retrospective studied performed in the same population 1-3 years previously. Almost all the isolated serotypes were included in the heptavalent conjugate vaccine. Half the strains showed reduced sensitivity to penicillin.
Insights
The incidence of Streptococcus pneumoniae meningitis in Spanish children is high, with nearly half of strains showing penicillin resistance. Most serotypes are covered by the heptavalent conjugate vaccine.
Area of Science:
- Pediatric infectious diseases
- Bacterial meningitis epidemiology
- Antimicrobial resistance surveillance
Context:
- Streptococcus pneumoniae is a leading cause of bacterial meningitis in children.
- Accurate incidence data and serotype distribution are crucial for prevention strategies.
- Antibiotic resistance patterns inform treatment guidelines.
Purpose:
- To determine the incidence of pneumococcal meningitis in Spanish children.
- To identify prevalent serotypes and their antibiotic resistance patterns.
- To assess the coverage of existing conjugate vaccines.
Summary:
- A prospective, multicenter study in Spain identified 52 cases of pneumococcal meningitis in children aged 0-14 years.
- The annual incidence was highest in children aged 1-2 years (17.75/100,000).
- Serotype 19F was most common (28.6%), and 47.6% of isolates showed reduced penicillin sensitivity. Eighty percent of serotypes were included in the heptavalent conjugate vaccine.
Impact:
- The study reveals a high incidence of pneumococcal meningitis in the studied Spanish population.
- Findings highlight the significant prevalence of penicillin-resistant S. pneumoniae strains.
- The high vaccine-serotype coverage underscores the importance of conjugate vaccination programs.
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