Table 1: Evidence for horizontal plasmid transfer in individual patients. Shown are beta-lactamase genotypes of patients where identical plasmid encoded beta-lactamase genes occur in different bacterial species, indicating that horizontal gene transfer may have occurred.
0: PCR negative, 1: PCR positive, x: not tested
CTX-M subtype ampC subtype
Patient number Bacterial species TEM SHV CTX-M I II III IV V MOX DHA EBC ACC FOX CIT
1 E. coli 0 1 1 0 1 0 1 0 0 0 0 0 0 0
1 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
2 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
2 E. coli 1 1 1 1 0 0 0 0 0 0 0 0 0 0
2 K. pneumoiae 1 1 1 1 0 0 0 0 0 0 0 0 0 0
3 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
3 E. coli 1 1 1 0 1 0 1 0 0 0 0 0 0 0
4 E. coli 1 1 1 0 1 0 1 0 0 0 0 0 0 0
4 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
5 K. pneumoiae 1 1 1 1 0 0 0 0 0 0 0 0 0 0
5 E. coli 0 1 1 1 0 0 0 0 0 0 0 0 0 0
6 E. coli 0 1 1 0 1 0 1 0 0 0 0 0 0 0
6 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
7 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
7 E. coli 1 0 1 1 0 0 0 0 0 0 0 0 0 0
8 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
8 E. coli 0 1 1 0 1 0 1 0 0 0 1 0 0 0
9 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
9 E. coli 0 0 1 1 0 0 0 0 0 0 0 0 0 0
10 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
10 E. coli 0 0 1 1 0 0 0 0 0 0 0 0 0 0
11 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
11 E. coli 1 0 1 1 0 0 0 0 0 0 0 0 0 0
12 E. coli 1 1 1 0 1 0 1 0 0 0 0 0 0 0
12 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
13 K. pneumoiae 0 0 1 1 0 0 0 0 0 0 0 0 0 0
13 E. coli 0 0 1 1 0 0 0 0 0 0 0 0 0 0
14 K. pneumoiae 1 1 1 1 0 0 0 0 0 0 0 0 0 0
14 E. coli 1 0 1 1 0 0 0 0 0 0 0 0 0 0
15 E. coli 1 1 1 0 1 0 1 0 0 0 0 0 0 0
15 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
16 E. coli 0 0 1 1 0 0 0 0 0 0 0 0 0 0
16 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
17 E. coli 1 1 1 0 1 0 1 0 0 0 0 0 0 0
17 E. cloacae 0 1 1 0 1 0 1 0 0 0 1 0 0 0
18 K. pneumoiae 0 1 1 1 0 0 0 0 0 0 0 0 0 0
18 E. coli 1 0 1 1 0 0 0 0 0 0 0 0 0 0
19 K. pneumoiae 1 0 1 1 0 0 0 0 0 0 0 0 0 0
19 E. coli 1 0 1 1 0 0 0 0 0 0 0 0 0 0
20 K. pneumoiae 1 1 0 x x x x x 0 0 0 0 0 0
20 E. coli 1 1 0 x x x x x 0 0 0 0 0 0
21 E. coli 0 1 0 x x x x x 0 0 0 0 0 0
21 K. pneumoiae 0 1 0 x x x x x 0 0 0 0 0 0
22 K. pneumoiae 1 1 1 1 0 0 0 0 0 0 0 0 0 0
22 K. oxytoca 1 1 1 1 0 0 0 0 0 0 0 0 0 0
23 K. pneumoiae 0 1 0 x x x x x 0 0 0 0 0 0
23 E. coli 1 1 0 x x x x x 0 0 0 0 0 0
20 K. pneumoiae 1 1 0 x x x x x 0 0 0 0 0 0