Serotype distribution in patients with severe pneumococcal disease, Toronto, 2002–2006.

*Serotypes listed are those which comprise >5% of isolates from any one category of disease. During the surveillance period, there 3 episodes of invasive disease due to serotype 1 (none in homeless persons), 10 episodes due to serotype 8 (1 in a homeless person), and no episodes of disease due to serotype 5.†Serotypes included in 7-valent conjugate and 23 valent polysaccharide vaccine.‡Serotypes included in 23-valent polysaccharide vaccine, but not the 7-valent conjugate vaccine.