|
Organisms
|
n = 223
|
Metronidazole resistance (2014–2017) n (%)
|
Metronidazole resistance (2010–2011) n (%)
|
P value (Pearson chi square)
|
Frequency of isolates tested for imipenem (n = 29) n (%)
|
Imipenem resistance (n = 7) n (%)
|
Imipenem resistance (2010–2011) N = 0/106
|
|---|
|
Overall resistance (excluding inherent resistance)
| |
39/223 (17.4))
|
13/106 (12.3)
|
0.184
|
–
|
7/29 (24.1)
|
0/106
|
|
Bacteroides fragilis
|
97
|
20 (20.6)
|
6/39 (15.3)
|
0.483
|
21
|
6
|
0
|
|
Bacteroides species
|
74
|
16 (21.6)
|
06/28(18)
|
0.983
|
5
|
1(27)
|
0
|
|
Clostridium species
|
39
|
2 (5)
|
1/32 (3)
|
0.676
|
3
|
0
|
0
|
|
Fusobacterium speciesa
|
3
|
0
|
0/1 (0)
|
–
|
–
|
–
|
–
|
|
Prevotella speciesa
|
3
|
1 (33)
|
0/6 (0)
|
–
|
–
|
–
|
0
|
|
Cutibacterium species
|
5
|
5b
|
–
|
–
|
–
|
–
|
–
|
|
Bifidobacterium speciesa
|
1
|
1b
|
–
| |
–
|
–
|
–
|
|
Eggerthella lenta
a
|
1
|
1b
|
–
| |
–
|
–
|
–
|
- Species marked (a) were included in “Other” category in regression analysis for association with drug resistance
- b Species inherently resistant to metronidazole - Organisms inherently resistant to metronidazole were not included in the comparison of metronidazole resistance between the two study periods
