caracterización de aislamientos invasivos de s. pneumoniae, h. influenzae y n. meningitidis en américa latina y el caribe: sireva ii, 2000-2005 characterization of invasive isolates of s. pneumoniae, h. influenzae, and n. meningitidis in latin america and the caribbean: sireva ii, 2000-2005
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2008
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Abstract
OBJETIVOS: Analizar las características fenotípicas y la susceptibilidad a antibióticos de las cepas circulantes de Streptococcus pneumoniae, Haemophilus influenzae y Neisseria meningitidis en América Latina y el Caribe entre 2000 y 2005. Se evaluó la cobertura potencial de las vacunas conjugadas. MÉTODOS: Se estudió por métodos convencionales la distribución de los serotipos o serogrupos de 17 303 cepas de S. pneumoniae, 2 782 cepas de H. influenzae y 6 955 cepas de N. meningitidis aisladas de casos de neumonía, meningitis, sepsis, bacteriemias y otros procesos invasivos. Se evaluó la susceptibilidad a los antibióticos de las cepas estudiadas. Los aislamientos procedían de 453 centros centinelas de 19 países de América Latina y 4 del Caribe, como parte del proyecto SIREVA II. RESULTADOS: El serotipo 14 de S. pneumoniae fue el más frecuentemente aislado (21,1%), especialmente en niños menores de 6 años (29,1%). Las coberturas potenciales de las vacunas conjugadas antineumocócicas hepta, nona, deca y tridecavalentes fueron de 59,0%, 73,4%, 76,5% y 85,9%, respectivamente. De los aislamientos, 63,3% eran sensibles a la penicilina. El serotipo b de H. influenzae estuvo presente en 72,2% de los aislamientos en niños menores de 2 años, mientras 8,6% correspondieron a los serotipos a, c, d, e y f; 19,2% resultaron no serotipables. La proporción de cepas de H. influenzae productoras de betalactamasa en aislamientos en niños menores de 2 años fue de 16,3%. Los serogrupos de N. meningitidis más frecuentes fueron el B (69,0%) y el C (25,7%); 65,8% y 99,2% de las cepas fueron sensibles a la penicilina y a la rifampicina, respectivamente. CONCLUSIONES: Estos resultados resaltan la importancia de la vigilancia epidemiológica integral de S. pneumoniae, H. influenzae y N. meningitidis en América Latina y el Caribe. La gran heterogeneidad en la distribución de los serotipos de S. pneumoniae en los países estudiados podría reducir la cobertura de las vacunas aplicadas. Se recomienda realizar un análisis específico por país para ajustar la introducción de nuevas vacunas conjugadas y decidir el esquema de vacunación más adecuado.
OBJECTIVES: To analyze the phenotypical characteristics and the susceptibility to antibiotics of the circulating strains of Streptococcus pneumoniae, Haemophilus influenzae, and Neisseria meningitidis circulating in Latin America and the Caribbean from 2000-2005. Potential coverage by conjugate vaccines was evaluated. METHODS: Conventional methods were used to study the distribution of the serotypes or serogroups of 17 303 strains of S. pneumoniae, 2 782 strains of H. influenzae, and 6 955 strains of N. meningitidis isolated from cases of pneumonia, meningitis, sepsis, bacteriemias, and other invasive processes. The antimicrobial susceptibilities of the study strains were evaluated. The isolates came from 453 sentinel surveillance sites in 19 countries in Latin America and four in the Caribbean, as part of the SIREVA II (Network Surveillance System for the Bacterial Agents Responsible for Pneumonia and Meningitis) project. RESULTS: S. pneumoniae serotype 14 was the most frequently isolated (21.1%), especially in children under 6 years of age (29.1%). The potential coverages by hepta-, nona-, deca-, and trideca-valent antipneumonia conjugate vaccines were 59.0%, 73.4%, 76.5%, and 85.9%, respectively. Of the isolates, 63.3% were sensitive to penicillin. H. influenzae serotype b was present in 72.2% of the isolations from children under 2 years of age, whereas 8.6% produced serotypes a, c, d, e, and f, and 19.2% could not be serotyped. The rate of H. influenzae beta-lactamase-producing strains isolated from children under 2 years of age was 16.3%. The most frequent N. meningitidis serogroups were B (69.0%) and C (25.7%); 65.8% and 99.2% of the strains were susceptible to penicillin and rifampicin, respectively. CONCLUSIONS: These results highlight the importance of comprehensive epidemiological surveillance of S. pneumoniae, H. influenzae and N. meningitidis in Latin America and the Caribbean. The great heterogeneity found in the distribution of S. pneumoniae serotypes among the countries studied could reduce immunization coverage. Conducting a specific analysis of each country to adjust the introduction of new conjugate vaccines and determine the best immunization plan is recommended.
OBJECTIVES: To analyze the phenotypical characteristics and the susceptibility to antibiotics of the circulating strains of Streptococcus pneumoniae, Haemophilus influenzae, and Neisseria meningitidis circulating in Latin America and the Caribbean from 2000-2005. Potential coverage by conjugate vaccines was evaluated. METHODS: Conventional methods were used to study the distribution of the serotypes or serogroups of 17 303 strains of S. pneumoniae, 2 782 strains of H. influenzae, and 6 955 strains of N. meningitidis isolated from cases of pneumonia, meningitis, sepsis, bacteriemias, and other invasive processes. The antimicrobial susceptibilities of the study strains were evaluated. The isolates came from 453 sentinel surveillance sites in 19 countries in Latin America and four in the Caribbean, as part of the SIREVA II (Network Surveillance System for the Bacterial Agents Responsible for Pneumonia and Meningitis) project. RESULTS: S. pneumoniae serotype 14 was the most frequently isolated (21.1%), especially in children under 6 years of age (29.1%). The potential coverages by hepta-, nona-, deca-, and trideca-valent antipneumonia conjugate vaccines were 59.0%, 73.4%, 76.5%, and 85.9%, respectively. Of the isolates, 63.3% were sensitive to penicillin. H. influenzae serotype b was present in 72.2% of the isolations from children under 2 years of age, whereas 8.6% produced serotypes a, c, d, e, and f, and 19.2% could not be serotyped. The rate of H. influenzae beta-lactamase-producing strains isolated from children under 2 years of age was 16.3%. The most frequent N. meningitidis serogroups were B (69.0%) and C (25.7%); 65.8% and 99.2% of the strains were susceptible to penicillin and rifampicin, respectively. CONCLUSIONS: These results highlight the importance of comprehensive epidemiological surveillance of S. pneumoniae, H. influenzae and N. meningitidis in Latin America and the Caribbean. The great heterogeneity found in the distribution of S. pneumoniae serotypes among the countries studied could reduce immunization coverage. Conducting a specific analysis of each country to adjust the introduction of new conjugate vaccines and determine the best immunization plan is recommended.
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gabastou2008revistacaracterizacin
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| Authors | ;Jean-Marc Gabastou;Clara Inés Agudelo;Maria Cristina de Cunto Brandileone;Elizabeth Castañeda;Ana Paula Silva de Lemos;José Luis Di Fabio |
| Journal | communications on pure and applied analysis |
| Year | 2008 |
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