Duration of shedding of different strains of S. pyogenes (7×108 cfu per 5 µl dose) in 8 week old male BALB/c mice after intranasal infection.

Duration of shedding of different strains of S. pyogenes (7×108 cfu per 5 µl dose) in 8 week old male BALB/c mice after intranasal infection.