Department of ENT;
Christian Medical College;
Vellore;
Tamil Nadu;
India;
Department of Clinical Microbiology;
Christian Medical College;
Vellore;
India;
Acute otitis media; Nasopharyngeal; Otopathogens; Case control study; Streptococcus pneumoniae; Haemophilus influenzae; Moraxella catarrhalis; Staphylococcus aureus;