[Nasal carriage of Streptococcus pneumoniae in elderly subjects according to vaccination status]. / Portación nasal de Streptococcus pneumoniae en adulto mayor y su respuesta frente a la vacunación antineumocócica.
Rev Med Chil
; 135(2): 160-6, 2007 Feb.
Article
en Es
| MEDLINE
| ID: mdl-17406732
BACKGROUND: S pneumoniae is the main cause of community-acquired pneumonia in the elderly, group that concentrates 95% of deaths. AIM: To assess the prevalence of nasal carriage of S pneumoniae in institutionalized elderly patients. MATERIAL AND METHODS: One hundred eighteen institutionalized subjects aged over 60 years (65 males) were enrolled. Since they were also participating in a controlled protocol related to the immunogenicity of an anti-pneumococcal vaccine, our investigation was also blind and randomized. According to randomization, they received pneumococcal or tetanic vaccine. Nasal swab cultures were taken at the beginning of the trial and two months after vaccination. According to recommended methods, we identified S pneumoniae, the serotypes and their antimicrobial susceptibility. RESULTS: In the first nasal sample, 16% of subjects were positive for S pneumoniae. The second sample was positive in 12%. Of the 33 isolated serotypes, 9.1% demonstrated intermediate resistance to penicillin and 3.3% were resistant to chloramphenicol. CONCLUSIONS: The study demonstrated a greater percentage of colonized patients than in the general population. The isolated serotypes are the same that cause invasive diseases in this age group, according to data of the Institute of Public Health of Chile. There were no differences in the percentage of colonization between subjects vaccinated against S pneumoniae and control groups, after two months of follow up. Isolated strains had a low resistance to penicillin. High level resistance was not observed.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Streptococcus pneumoniae
/
Portador Sano
/
Nasofaringe
/
Vacunas Neumococicas
/
Antibacterianos
Tipo de estudio:
Clinical_trials
/
Risk_factors_studies
Límite:
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Es
Revista:
Rev Med Chil
Año:
2007
Tipo del documento:
Article
País de afiliación:
Chile
Pais de publicación:
Chile