[Antibiotic resistance and distribution of serotypes of invasive pneumococcal strains isolated from hospitalized adults in Lima, Peru]

Rev Peru Med Exp Salud Publica. 2017 Oct-Dec;34(4):633-641. doi: 10.17843/rpmesp.2017.344.2884.
[Article in Spanish]

Abstract

Objectives.: To describe the clinical characteristics, antibiotic resistance, and distribution of serotypes of bacterial strains that cause invasive pneumococcal disease (IPD) in adults.

Materials and methods.: Case series. Pneumococcal strains were isolated from 2009 to 2011 from hospitalized adult patients with IPD in five hospitals and two laboratories located in Lima.

Results.: The analysis of data from 43 patients with IPD indicated that 58.2% were older than 60 years. The most common complications were pneumonia (39.5%), meningitis (30.2%), bacteremia (13.9%), peritonitis (11.6%), and septic arthritis (4.8%). The mortality rate was 28.9%, and 72.7% of cases involved patients older than 60 years. The pneumococcal strains were resistant to the following antibiotics: penicillin, 0% and 30.8% in non-meningitis and meningitis strains, respectively; ceftriaxone, 4.5% and 16.7% in non-meningitis and meningitis strains, respectively; trimethoprim/sulfamethoxazole, 69.0%; and erythromycin, 35.7%. The most common serotypes were 19F, 23F, 6B, 14, and 6C. The percentage of vaccine strains was 44.2% for the 7-valent conjugate pneumococcal vaccine (PCV7) and PCV10, 51.2% for PCV13, and 60.4% for the 23-valent polysaccharide vaccine (PPV23).

Conclusions.: Pneumococcus is an important pathogen in adults, particularly in older adults, owing to its high mortality rate.

Objetivos.: Describir las características clínicas, resistencia antibiótica y distribución de serotipos de cepas causantes de enfermedad neumocócica invasiva (ENI) en adultos.

Materiales y métodos.: Estudio tipo serie de casos. Se recolectaron cepas de neumococo de pacientes adultos hospitalizados con ENI en cinco hospitales nacionales y dos laboratorios de Lima durante los años 2009-2011.

Resultados.: Se estudiaron datos de 43 pacientes con ENI, el 58,2% fueron mayores de 60 años. Los diagnósticos fueron neumonía 39,5%, meningitis 30,2%, bacteriemia 13,9%, peritonitis 11,6%, artritis séptica 4,8%. El porcentaje de fallecidos fue 28,9%, de los cuales el 72,7% fueron mayores de 60 años. Las cepas de neumococo presentaron la siguiente resistencia: penicilina 0% en cepas no meningitis y 30,8% en cepas meningitis; ceftriaxona 4,5% y 16,7% de resistencia intermedia en cepas no meningitis y cepas meningitis respectivamente; 69% a trimetoprim/sulfametoxazol y 35,7% a eritromicina. Los serotipos más comunes fueron 19F, 23F, 6B, 14 y 6C. El porcentaje de cepas vacunales fue 44,2% para la vacuna conjugada siete-valente (PCV7) y para la PCV10, 51,2% para PCV13 y 60,4% para la vacuna polisacárida veintitrés-valente (PPV23).

Conclusiones.: El neumococo es un patógeno relevante en adultos, en especial en los adultos mayores, debido a su elevada mortalidad.

Publication types

  • Multicenter Study

MeSH terms

  • Adolescent
  • Adult
  • Drug Resistance, Bacterial*
  • Female
  • Hospitalization
  • Humans
  • Male
  • Middle Aged
  • Peru
  • Serogroup
  • Streptococcus pneumoniae / classification*
  • Streptococcus pneumoniae / drug effects*
  • Streptococcus pneumoniae / genetics
  • Streptococcus pneumoniae / isolation & purification
  • Urban Population
  • Young Adult