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Table 3 Frequency of clindamycin and erythromycin resistance among invasive and colonizing group B streptococcal isolates by age

From: Frequency of antimicrobial resistance among invasive and colonizing Group B Streptococcal isolates

  Invasive isolates (n= 486) Colonizing isolates1 (n= 167)
Age group (no.) Clindamycin resistance no. (%) Erythromycin resistance no. (%) Clindamycin resistance no. (%) Erythromycin resistance no. (%)
< 1 (75) 16 (21.3) 18 (24.0) - -
1–17 (5) 1 (20.0) 1 (20.0) - -
18–29 (17) 5 (29.4) 6 (35.3) 68(40.7)2 70 (41.9)3
30–49 (70) 17 (24.3) 22 (31.4) - -
≥ 50 (315) 58 (18.4) 72 (22.9) - -
Total (482) 97 (20.1) 119 (24.7) 68 (40.7) 2 70 (41.9) 2
  1. 1: All colonizing isolates were from individuals 18–19 years of age.
  2. 2: Significantly different (P < .05) from the value for invasive isolates.
  3. 3: Not significantly different (P = .13) from the value for invasive isolates.