Table 3 Antimicrobial susceptibility of GBS carrier and invasive isolates. All GBS isolates examined were found penicillin susceptible. Isolates with inducible clindamycin resistance (D-test) are included

Antimicrobial susceptibility pattern carriage isolates (women in labor) (N = 96¹)

Antibiotics

Resistant

Erythromycin

20 (20.8 %) (95 % CI: 12.7–29.0 %)

Clindamycin

25 (26.0 %) (95 % CI: 17.3–34.8 %)

Antimicrobial susceptibility pattern of all 203 invasive isolates in 2019 (males and females)

Antibiotics

Resistant

Erythromycin

45 (22.2 %) (95 % CI: 16.5–27.9 %)

Clindamycin

30 (14.8 %) (95 % CI: 9.9–19.7 %)

Antimicrobial susceptibility pattern of all EOGBS isolates in 2019 (N = 17) (newborn)

Antibiotics

Resistant

Erythromycin

3 (17.6 %) (95 % CI: − 0.05–35.8 %)

Clindamycin

1 (5.9 %) (95 % CI: − 5.3–17.1 %)

Antimicrobial susceptibility pattern of all LOGBS isolates in 2019 (N = 9) (infants)

Antibiotics

Resistant

Erythromycin

6 (66.7 %) (95 % CI: 35.9–97.5 %)

Clindamycin

5 (55.6 %) (95 % CI: 23.1–88.0 %)

Antimicrobial susceptibility pattern of isolates from the age group 18–44 in 2019 (N = 22) (males and females)

Antibiotics

Resistant

Erythromycin

4 (18.2 %) (95 % CI: 2.0–34.3 %)

Clindamycin

3 (13.6 %) (95 % CI: − 0.7–28.0 %)

Antimicrobial susceptibility pattern of isolates from women in their fertile age (18–44 years) in 2019 (N = 17)

Antibiotics

Resistant

Erythromycin

2 (11.8 %) (95 % CI: − 3.6–27.1 %)

Clindamycin

1 (5.9 %) (95 % CI: − 5.3–17.1 %)