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Table 1 Bacteriology and Culture Site of Multidrug-resistant Gram-negative Bacteria (MDRGNB) Isolates Identified during Index Hospitalization and Within 1 year after Index Hospitalization Discharge

From: Risk for subsequent infection and mortality after hospitalization among patients with multidrug-resistant gram-negative bacteria colonization or infection

Bacterial species MDRGNB culture positive groupa (n = 125) MDRGNB culture negative groupb (n = 692)
Overall Isolation site Overall Isolation site
Respiratoryc Urine Blood Othersd Respiratoryc Urine Blood Othersd
Index hospitalizatione,f
Escherichia coli 47 (37.6) 17 (13.6) 26 (20.8) 4 (3.2) 7 (5.6)
Acinetobacter species 32 (25.6) 25 (20.0) 7 (5.6) 2 (1.6) 4 (3.2)
Pseudomonas aeruginosa 22 (17.6) 17 (13.6) 5 (4.0) 0 (0.0) 0 (0.0)
Klebsiella pneumoniae 21 (16.8) 15 (12.0) 6 (4.8) 1 (0.8) 1 (0.8)
Enterobacter species 17 (13.6) 11 (8.8) 5 (4.0) 1 (0.8) 3 (2.4)
Proteus mirabilis 4 (3.2) 3 (2.4) 1 (0.8) 0 (0.0) 0 (0.0)
 Other bacteriag 20 (16.0) 13 (10.4) 2 (1.6) 3 (2.4) 2 (1.6)
Subsequent infectionf,h,i
Escherichia coli 24 (40.0) 9 (15.0) 13 (21.7) 3 (5.0) 1 (1.7) 13 (18.8) 2 (2.9) 8 (11.6) 3 (4.3) 2 (2.9)
Acinetobacter species 15 (25.0) 12 (20.0) 2 (3.3) 1 (1.7) 2 (3.3) 23 (33.3) 22 (31.9) 1 (1.4) 3 (4.3) 0 (0.0)
Pseudomonas aeruginosa 12 (20.0) 10 (16.7) 2 (3.3) 0 (0.0) 0 (0.0) 8 (11.6) 6 (8.7) 1 (1.4) 1 (1.4) 0 (0.0)
Klebsiella pneumoniae 10 (16.7) 6 (10.0) 4 (6.7) 0 (0.0) 0 (0.0) 14 (20.3) 9 (13.0) 2 (2.9) 3 (4.3) 1 (1.4)
Enterobacter species 1 (1.7) 0 (0.0) 0 (0.0) 1 (1.7) 0 (0.0) 7 (11.7) 7 (10.1) 0 (0.0) 0 (0.0) 0 (0.0)
Proteus mirabilis 5 (8.3) 3 (5.0) 0 (0.0) 0 (0.0) 2 (3.3) 3 (4.3) 1 (1.4) 0 (0.0) 0 (0.0) 1 (1.4)
 Other bacteria 2 (3.3)j 0 (0.0) 2 (3.3) 0 (0.0) 0 (0.0) 5 (7.2)k 1 (1.4) 1 (1.4) 1 (1.4) 0 (0.0)
  1. aIndicates patients with at least 1 positive MDRGNB culture during index hospitalization
  2. bIndicates patients without any positive MDRGNB culture during index hospitalization
  3. cIncluding nasal swab, throat swab, and sputum culture
  4. dIncluding axillary or inguinal skin, wound, soft tissue pus, drainage, bile, pleural fluid, ascites, and catheter tip culture
  5. eIncluding surveillance and clinical culture during index hospitalization
  6. fOne MDR-GNB species could be isolated from different anatomical sites
  7. gIncluding Serratia marcescens (4), Morganella morganii (2), Achromobacter xylosoxidans (2), Burkholderia cepacia complex (1), Citrobacter freundii (3), Aeromonas hydrophila (1), Aeromonas sobria (1), Providencia stuartii (1), Sphingomonas paucimobilis (1), Klebsiella oxytoca (1), and unidentified nonfermentative gram-negative bacilli (3)
  8. hWithin 1 year after discharge from index hospitalization
  9. iDiagnosed with positive clinical culture and compatible clinical presentation
  10. jIncluding Serratia marcescens (1) and unidentified nonfermentative gram-negative bacilli (1)
  11. kIncluding Klebsiella oxytoca (2), Serratia marcescens (1), and unidentified non-fermentative gram-negative bacilli (2)