Table 2.
Antimicrobial-Resistant GNB That Colonized Infants at NICU Discharge
| Resistance Category and Species | Colonized Infants and Isolatesa,b | Study Sitea | |||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Gentamicin resistant | 46 (3.5) | 28 (6.3) | 6 (1.8) | 6 (2.9) | 6 (1.8) |
| Citrobacter spp. | 7 | 5 | 0 | 1 | 1 |
| Escherichia coli | 25 | 15 | 3 | 3 | 4 |
| Klebsiella spp. | 15 | 10 | 3 | 2 | 0 |
| Otherc | 2 | 0 | 0 | 1 | 1 |
| Third/fourth-generation cephalosporin resistant | 59 (4.5) | 19 (4.3) | 21 (6.2) | 9 (4.4) | 10 (3.0) |
| Acinetobacter baumannii | 4 | 3 | 1 | 0 | 0 |
| Citrobacter spp. | 13 | 0 | 11 | 1 | 1 |
| Enterobacter spp. | 17 | 5 | 4 | 4 | 4 |
| Escherichia coli | 13 | 7 | 2 | 0 | 4 |
| Klebsiella spp. | 8 | 2 | 3 | 3 | 0 |
| Otherd | 5 | 2 | 1 | 1 | 1 |
| Carbapenem resistant | 23 (1.7) | 7 (1.6) | 8 (2.3) | 1 (0.5) | 7 (2.1) |
| Enterobacter spp. | 8 | 1 | 4 | 0 | 3 |
| Proteus mirabilis | 5 | 1 | 2 | 1 | 1 |
| Serratia marcescens | 3 | 3 | 0 | 0 | 0 |
| Klebsiella pneumoniae e | 1 | 1 | 0 | 0 | 0 |
| Otherf | 76 | 21 | 2 | 0 | 3 |
Abbreviations: GNB, gram-negative bacilli; NICU, neonatal intensive care unit.
aData are presented as number (percent) of colonized infants or number of isolates (infants could be colonized by more than 1 resistant GNB species).
bOne infant was colonized with 2 GNB species, each resistant to a different antimicrobial category, and 8 infants were colonized with 1 GNB species resistant to ≥2 antimicrobial categories.
cOther: 1 Enterobacter spp. and 1 Pseudomonas aeruginosa.
dOther: 2 Morganella morganii, 2 Pseudomonas spp., and 1 Serratia marcescens.
eOne isolate harbored K. pneumoniae carbapenemase and was also resistant to gentamicin and third/fourth-generation cephalosporin.
fOther: 2 Citrobacter spp., 1 Morganella morganii, 2 Pantoea spp., and 1 Escherichia coli.