• Hanke CR, Grijalva CG, Chochua S, Pletz MW, Hornberg C, Edwards KM, Griffin MR, Verastegui H, Gil AI, Lanata CF, Klugman KP, Vidal JE. Bacterial Density, Serotype Distribution and Antibiotic Resistance of Pneumococcal Strains from the Nasopharynx of Peruvian Children Before and After Pneumococcal Conjugate Vaccine 7. The Pediatric infectious disease journal. 2016 Apr;35(4). 432-9. PMID: 26974749 [PubMed].

Abstract 

Pneumococcal conjugate vaccines (PCV) have decreased nasopharyngeal carriage of vaccine types but little data exist from rural areas. We investigated bacterial density, serotype distribution and antibiotic resistance of pneumococcal strains within the nasopharynx of young children in the Peruvian Andes, 2 years after PCV7 was introduced.