2017 | Month: | Volume:4 | Issue:1 | Page:18-26

Pharyngeal carriage of Group A streptococci among school children

Objectives: The aims of the study were to determine the pharyngeal carriage rate of Group A streptococci among school children at Thrissur, Kerala and to determine the antibiotic sensitivity pattern of the above isolates.
\r\nMaterials and methods: Throat swabs were collected from a total of 260 asymptomatic children(130 each from rural and urban areas) of eighth and ninth standard classes during a period between July 2012 and July 2013. Presumptively identified Group A Streptococci (GAS/Streptococcus pyogenes) were serogrouped by agglutination tests using specific antisera. Antibiotic sensitivity was performed by disc diffusion method following CLSI guidelines.
\r\nResults: The GAS carriage rate noted in the study was 23.1%. Carriage distribution was found to be independent of age, sex and locality with more number of cases during winter season. All the isolates were found to be sensitive to Penicillin and Vancomycin. Five isolates each were found to be resistant to Erythromycin and Clindamycin respectively. Inducible Clindamycin resistance was demonstrated in three of them. GAS was isolated from the throat swab of one child with past history of joint pains and another child with past history of skin infection- both of them presently had findings of heart disease.
\r\nConclusion: When screened and appropriately treated with antibiotics, carriers can be prevented from spreading streptococcal infections in the school environment and the community. Combined efforts by clinicians, community health personnel and clinical microbiologists are required for the early detection and control of streptococcal infections.

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