Prevalence of antistreptolysin O in Mexican and Paraguayan children.
D000293:Adolescent; D000367:Age Factors; D000531:Altitude; D000989:Antistreptolysin / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D002980:Climate; D005260:Female; D005843:Geography; D006801:Humans; D007223:Infant; D008297:Male; D008800:Mexico; D010239:Paraguay; D013290:Streptococcal Infections / Q000453:epidemiology / Q000276:immunology
D000989:Antistreptolysin