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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.