Table 3.

Penicillin susceptibility results of each pneumococcal serotype isolated from nasopharyngeal aspirates of children < 5 yr of age during 1997-2002 and 2009-2010 periods in Korea^*,†

^*For 1997-2002 period, data of 139 pneumococcal isolates from two studies were used; 72 isolates in 1997-1998 and 67 isolates in 2001-2002 (8, 9); ^†PCV7, 7-valent conjugate vaccine; ^‡Percentages have been rounded; ^§NS, Pneumococci nonsusceptible to penicillin; ^∥Differentiation of serotype 6C/6D from 6A/6B was not done in 1997-2002 studies. 6C isolates are included in 6A and 6D isolates are included in 6B. During 2009-2010 period, number of serotype 6A, 6B, 6C, and 6D were 23, 3, 3, and 7, respectively.