Table 2 GNB and CR-GNB strains isolated from the ICU environments from 2019 to 2022, n (%).

From: Environmental contamination of carbapenem-resistant gram-negative bacteria away from isolated patients in intensive care unit: a comprehensive surveillance study

Year

2019(n = 540)

2020* (n = 495)

2021(n = 540)

2022#(n = 640)

p

GNB

18 (3.3)

48 (9.7)

31 (5.7)

47 (7.5)

< 0.001

A. baumannii

13 (2.4)

32 (6.5)

28 (5.2)

35 (5.5)

0.016

P. aeruginosa

2 (0.4)

10 (2.0)

1 (0.2)

4 (0.6)

0.003

K. pneumoniae

3 (0.6)

6 (1.2)

2 (0.4)

8 (1.3)

0.264

CR-GNB

5 (0.9)

35 (7.1)

22 (4.1)

28 (4.4)

< 0.001

CRAB

3 (0.6)

25 (5.1)

21 (3.9)

23 (3.6)

< 0.001

CRPA

1 (0.2)

9 (1.8)

0

4 (0.6)

0.001

CRKP

1 (0.2)

1 (0.2)

1 (0.2)

1 (0.2)

0.998

  1. Note: GNB, gram-negative bacteria; CR-GNB, carbapenem-resistant gram-negative bacteria. Bold p-values indicate statistical significance (p < 0.05).
  2. *We did not conduct environmental sampling in the ICU in February 2020 due to the COVID-19 outbreak in China.
  3. #The number of environmental samples in the ICU increased from 45 to 65 per month beginning in August 2022 due to bed capacity expansion.
Back to article page