PREVALENCE STUDY OF GROUP A STREPTOCOCCI AND ITS ANTIMICROBIAL SENSITIVITY PATTERN IN UPPER RESPIRATORY TRACT INFECTIONS OF ALL AGE GROUPS IN A TERTIARY HEALTH CARE CENTRE IN CHENGALPET DISTRICT. Journal of Pharmaceutical Negative Results, [S. l.], p. 2051–2059, 2022. DOI: 10.47750/pnr.2022.13.S01.241. Disponível em: https://pnrjournal.com/index.php/home/article/view/1574.. Acesso em: 8 jun. 2026.