title: [A seroepidemiological study on S. pyogenes in Ecuador].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000907:Antibodies, Bacterial / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D004484:Ecuador; D006801:Humans; D007223:Infant; D007564:Japan; D008875:Middle Aged; D013290:Streptococcal Infections / Q000453:epidemiology*; D013297:Streptococcus pyogenes / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial