Duration of shedding of different strains of <i>S. pyogenes</i> (7×10<sup>8</sup> cfu per 5 µl dose) in 8 week old male BALB/c mice after intranasal infection.

<p>Duration of shedding of different strains of <i>S. pyogenes</i> (7×10<sup>8</sup> cfu per 5 µl dose) in 8 week old male BALB/c mice after intranasal infection.</p>