| [beta-hemolytic streptococci in the schoolchildren of the tunis governorship]. | an investigation based on 1008 pharyngeal samples effected on school children aged six to twelve years of tunis area has shown 71 carriers of beta-hemolytic streptococci (percentage 7%) whose 42 lancefield's group a. the strains isolated had been tested by agar diffusion technic about seven antimicrobial agents. the most active ones ampicillin are. tetracyclin, oxytetracycline and oxacillin are the less active ones. | 1982 | 6762856 |