Table 3 Comparison of peripartal risk factors for colonization with enterococci and multidrugresistant enterococci in meconium and surveillance cultures of infants. For differences in proportions between two groups, the Fisher's exact test was performed.

Enteroccous-positive

21 (33.3%)

42 (19.9%)

1.675 (1.076–2.605)

0.0395

^aMDR-enterococcus-positive

19 (30.2%)

17 (8.1%)

3.743 (2.073–6.759)

<0.0001

2. Birth weight

< 2.500 g

(n = 138)

≥ 2.500 g

(n = 136)

Enterococcus-positive

38 (27.5%)

25 (18.4%)

1.498 (0.959–2.340)

0.085

^aMDR-enterococcus-positive

25 (18.1%)

11 (8.1%)

2.240 (1.148–4.371)

0.019

< 1.000 g

(n = 27)

≥ 1.000 g

(n = 247)

Enterococcus-positive

11 (40.7%)

52 (21.1%)

1.935 (1.156–3.239)

0.0293

^aMDR-enterococcus-positive

11 (40.7%)

25 (10.1%)

4.025 (2.237–7.244)

0.0001

3. Prepartal hospitalization

≥ 3 days

(n = 49)

< 3 days

(n = 224)

Enterococcus-positive

11 (22.4%)

52 (23.2%)

0.967 (0.546–1.714)

1.000

^aMDR-enterococcus-positive

7 (14.3%)

29 (12.9%)

1.108 (0.516–2.383)

0.816

4. Prepartal antibiotics

≥ 1 day

(n = 54)

< 1 day

(n = 216)

Enterococcus-positive

16 (29.6%)

42 (19.4%)

1.460 (0.893–2.388)

0.146

^aMDR-enterococcus-positive

12 (22.2%)

21 (9.7%)

2.286 (1.201–4.351)

0.019

5. Delivery mode

Cesarean section

(n = 174)

Vaginal delivery

(n = 100)

Enterococcus-positive

42 (24.1%)

21 (21.0%)

1.149 (0.724–1.826)

0.655

^aMDR-enterococcus-positive

28 (16.1%)

8 (8.0%)

2.011 (0.954–4.243)

0.0641

6. Maternal rectovaginal colonization

Enterococcus-positive

(n = 53)

Enterococcus-negative

(n = 47)

Enterococcus-positive

9 (17.0%)

8 (17.0%)

0.998 (0.419–2.374)

1.000

^aMDR-enterococcus-positive

1 (1.9%)

2 (2.1%)

0.443 (0.042–4.737)

0.600

7. PROM ^b

≥ 24 hours

(n = 17)

< 24 hours

(n = 248)

Enterococcus-positive

2 (11.8%)

58 (23.4%)

0.478 (0.128–1.791)

0.376

^aMDR-enterococcus-positive

2 (11.8%)

32 (12.9%)

0.912 (0.238–3.488)

1.000