Table 2.
Distribution of organisms, according to carbapenem (imipenem/imipenem-EDTA) sensitivity patterns and zone diameter difference
|
Only Int-1 gene |
Only bla NDM-1 gene |
Int-1+bla NDM-1 genes |
No gene detected |
Total |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sensitivity; zone dia. diff. |
Es |
Kl |
Ps |
Ac |
Es |
Kl |
Ps |
Ac |
Es |
Kl |
Ps |
Ac |
Es |
Kl |
Ps |
Ac |
||
|
S; <7 mm |
In |
3 |
1 |
1 |
2 |
2 |
1 |
1 |
1 |
2 |
3 |
2 |
1 |
2 |
0 |
1 |
1 |
24 |
|
Out |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
2 |
1 |
0 |
0 |
0 |
0 |
8 |
|
|
S; >7 mm |
In |
0 |
0 |
1 |
2 |
1 |
0 |
1 |
1 |
0 |
1 |
2 |
1 |
0 |
0 |
1 |
1 |
12 |
|
Out |
0 |
1 |
0 |
0 |
0 |
1 |
0 |
1 |
1 |
2 |
1 |
1 |
0 |
0 |
0 |
0 |
8 |
|
|
R; <7 mm (SBLs) |
In |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
2 |
1 |
0 |
0 |
0 |
0 |
9 |
|
Out |
0 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
4 |
1 |
1 |
0 |
1 |
0 |
13 |
|
|
R; >7 mm (MBLs) |
In |
1 |
2 |
2 |
0 |
1 |
2 |
1 |
0 |
2 |
12 |
6 |
1 |
1 |
1 |
1 |
0 |
33 |
|
Out |
1 |
1 |
2 |
1 |
1 |
1 |
1 |
1 |
2 |
6 |
10 |
1 |
1 |
0 |
1 |
1 |
31 |
|
|
TOTAL |
|
6 |
6 |
8 |
6 |
6 |
6 |
6 |
6 |
10 |
27 |
29 |
8 |
5 |
1 |
5 |
3 |
138 |
|
|
26 |
24 |
74 |
14 |
||||||||||||||
Ac, Acinetobacter spp; Es, Escherichia spp; In, incoming untreated wastewater stream; Kl, Klebsiella spp; MBLs, presumptive metallo beta-lactamase enzyme positive; Out, outgoing treated wastewater stream; Ps, Pseudomonas spp; R, imipenem resistant; S, imipenem sensitive; SBLs, presumptive serine beta-lactamase enzyme positive.