Microbial Predominance and Antimicrobial Resistance in a Tertiary Hospital in Northwest China: A Six-Year Retrospective Study of Outpatients and Patients Visiting the Emergency Department
Table 3
Annual number and percentage (%) of bacterial isolates from the specimens between 2013 and 2018 from outpatients and patients visiting emergency department.
Bacterial species
2013
2014
2015
2016
2017
2018
value
Trend
N
%
N
%
N
%
N
%
N
%
N
%
Gram-negative
Escherichia coli
134
70.2
149
66.8
128
61.0
138
53.5
218
60.2
268
56.9
0.471
No change
Klebsiella pneumonia
21
11.0
24
10.8
14
6.7
29
11.2
38
10.5
56
11.9
0.400
No change
Pseudomonas aeruginosa
9
4.7
19
8.5
11
5.2
18
7.0
18
5.0
32
6.8
0.760
No change
Enterobacter cloacae
4
2.1
3
1.3
1
0.5
9
3.5
12
3.3
22
4.7
0.033
↑
Acinetobacter baumannii
6
3.1
5
2.2
7
3.3
7
2.7
9
2.5
14
3.0
0.870
No change
Proteus mirabilis
3
1.6
6
2.7
5
2.4
9
3.5
11
3.0
7
1.5
0.985
No change
Others
14
7.3
17
7.6
44
21.0
48
18.6
56
15.5
72
15.3
Total
191
100.0
223
100.0
210
100.0
258
100.0
362
100.0
471
100.0
Gram-positive
Staphylococcus epidermidis
37
18.1
81
28.1
37
20.4
29
12.7
45
18.0
39
11.3
<0.001
↓
Staphylococcus aureus
12
5.9
20
6.9
20
11.0
45
19.7
50
20.0
80
23.3
0.002
↑
Enterococcus faecalis
21
10.3
33
11.5
20
11.0
30
13.2
33
13.2
56
16.3
0.984
No change
Staphylococcus haemolyticus
34
16.7
39
13.5
22
12.2
12
5.3
11
4.4
20
5.8
<0.001
↓
Streptococcus mitis
5
2.5
16
5.6
16
8.8
17
7.5
20
8.0
28
8.1
0.556
No change
Enterococcus faecium
9
4.4
7
2.4
10
5.5
17
7.5
19
7.6
32
9.3
0.163
No change
Others
86
42.2
92
31.9
56
30.9
78
34.2
72
28.8
89
25.9
Total
204
100.0
288
100.0
181
100.0
228
100.0
250
100.0
344
100.0
Other gram-negative bacteria mainly include Enterobacteria, Pseudomonas, Proteus, Citrobacter, Haemophilus, Neisseria, Bacteroides, Aeromonas, and Morgan bacteria. Other positive bacteria mainly include coagulase-negative Staphylococci, Streptococci, Enterococci, Micrococcus, Cooka, Lactobacillus, Corynebacterium, Actinomycete, Nocardia, and Clostridia.
