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Published on: February 23, 2014
[Invasive disease caused by Streptococcus pneumoniae: serotypes and antimicrobial susceptibility in a Health Care
F Pardo Sánchez1, M L Pérez del Molino Bernal, P A Romero Jung
1Servicio de Microbiología, Hospital Clinico Universitario de Santiago de Compostela, Santiago de Compostela, Spain.
Abstract:
In the Health Care Area of Santiago de Compostela, during three years (2004-2006), we studied 218 Streptococcus pneumoniae isolates from invasive disease (10 CSF, 133 blood culture, 7 pleural fluid, 9 corneal ulcer and 59 lower respiratory tract), to determine the predominant serotypes and antimicrobial susceptibility. 77.1% of the isolates were from adults and 22.9% from pediatric patients. There were 33 different serotypes, six of them occurring in more than 5% of cases, in decreasing order: 19 (16.97%), 3 (11.46%), 1 (10.55%), 14 (10.55%), 23 (6.88%) and 6 (6.88%). The predominant serogroup in CSF was 19 and in blood culture predominant serogroups were 19, 1, 14 and 3. 63.76% of the isolates were susceptible to all antibiotics tested. The most frequent resistance phenotypes were to erythromycin (24.31%), followed by penicillin (18.34%). Both phenotypes were associated with serotypes 19, 14 and 6. The resistance to levofloxacin was 0.9% and 0.5% to cefotaxime. We did not find any vancomycin resistance.
Insights
This study identified the most common Streptococcus pneumoniae serotypes causing invasive diseases in Santiago de Compostela. It also revealed high resistance to erythromycin and penicillin among these bacterial isolates.
Area of Science:
- Microbiology
- Infectious Diseases
- Epidemiology
Context:
- Invasive Streptococcus pneumoniae infections pose a significant public health challenge.
- Understanding regional serotype distribution and antimicrobial resistance is crucial for effective treatment and prevention strategies.
Purpose:
- To determine the predominant serotypes of Streptococcus pneumoniae causing invasive diseases in the Health Care Area of Santiago de Compostela between 2004 and 2006.
- To assess the antimicrobial susceptibility patterns of these isolates.
Summary:
- A total of 218 Streptococcus pneumoniae isolates from various invasive sites were analyzed.
- Serotypes 19, 3, 1, 14, 23, and 6 were the most prevalent, accounting for over 5% of cases.
- While 63.76% of isolates were susceptible to all tested antibiotics, significant resistance was observed for erythromycin (24.31%) and penicillin (18.34%), particularly in serotypes 19, 14, and 6. Resistance to levofloxacin and cefotaxime was low, and no vancomycin resistance was detected.
Impact:
- This data provides valuable insights into the local epidemiology of invasive pneumococcal disease.
- Findings can inform vaccination policies and guide empirical antibiotic treatment choices, potentially reducing morbidity and mortality.
- Highlights the need for ongoing surveillance of antimicrobial resistance patterns in Streptococcus pneumoniae.
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