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Table 1 Total population according to different study analysis steps

From: Streptococcus pneumoniaeSerotype 3 among Costa Rican Children with Otitis Media: clinical, epidemiological characteristics and antimicrobial resistance patterns

STUDY POPULATION YEARS TOTAL PERCENTAGE
Tympanocentesis performed 1992–2007 1919  
Bacterial pathogens isolated 1992–2007 1208/1919 62.9%
S. pneumonia positive cultures 1992–2007 511/1208 42.3%
S. pneumonia serotyping 1999–2006 346/511 68.0%