Prevalence and predicting factors of Group A beta-hemolytic Streptococcus carrier state in primary schoolchildren

INTRODUCTION: Transmission of Group A Streptococcus from asymptomatic children to their surrounding carries a risk of acute rheumatic fever in susceptible people. AIM AND OBJECTIVES: We aimed to investigate the prevalence and predictors of GAS carrier state and evaluate the antibiotic sensitivity pattern of GAS in Jakarta, Indonesia. MATERIAL AND METHODS: We enrolled 201 asymptomatic schoolchildren (6–12 years) using stratified random sampling from a primary school in Jakarta. None of the children had a history of rheumatic fever or rheumatic heart disease. All participants underwent physical examination, and laboratory tests include complete blood count, erythrocyte sedimentation rate, C-reactive protein, antistreptolysin O titer, and throat swab culture. RESULTS: The prevalence of GAS carrier was 13.9% (95% confidence interval: 9.2%–18.6%) in our study. On multivariate analysis, tonsillar enlargement was found to be the only predicting factor of GAS carrier (P = 0.03). GAS was sensitive to penicillin G, erythromycin, vancomycin, clindamycin, chloramphenicol, azithromycin, and tetracycline in 100%, 89%, 86%, 75%, 68%, 68%, and 32% of patients, respectively. CONCLUSION: The GAS carrier state is common among school-age children affecting approximately 13.9% children. Tonsillar enlargement is a significant finding predictive of GAS carrier state. All isolates are still sensitive to penicillin and mostly sensitive to erythromycin but are increasingly resistant to tetracycline.