Control strains producing well-characterized β-lactamases
Strain | Organism | β-Lactamase | Groupa | Source or reference |
---|---|---|---|---|
CF2 | Enterobacter cloacae | CTX-M-1 | I | 18 |
Rio-4 | Proteus mirabilis | CTX-M-2 | II | 5 |
VER-1 | E. cloacae | CTX-M-3 | I | 18 |
Cfr2525/96 | Citrobacter freundii | CTX-M-3 | I | 21 |
Eco3553/98 | E. coli | CTX-M-15 | I | 1 |
34 | Salmonella enterica serovar Typhimurium | CTX-M-5 | II | 9 |
Rio-3 | Enterobacter aerogenes | CTX-M-8 | III | 5 |
785D | E. coli | CTX-M-9 | IV | 36 |
EC97/38582 | E. coli | CTX-M-10 | I | 31 |
EC984167 | E. coli | CTX-M-14 | IV | 26 |
CF1 | E. coli | CTX-M-14 | IV | 18 |
Rio-6 | E. coli | CTX-M-16 | IV | 4 |
BM4493 | Klebsiella pneumoniae | CTX-M-17 | IV | 13 |
ILT-2 | K. pneumoniae | CTX-M-18 | IV | 35 |
ILT-3 | K. pneumoniae | CTX-M-19 | IV | 35 |
CT1b | E. coli | Toho-1 | II | 25 |
S1b | E. coli | SHV-2 | 20 | |
S2b | E. coli | SHV-7 | 8 | |
T1b | E. coli | TEM-3 | 20 | |
T4b | E. coli | TEM-10 | 20 | |
T5b | E. coli | TEM-50 | 37 |
↵a Group I includes CTX-M-1, -3, -10 to -12, -15 (UOE-1), -22, -23, -28, -29, and -30. Group II includes CTX-M-2, -4 to -7, and -20 and Toho-1. Group III includes CTX-M-8. Group IV includes CTX-M-9, -13, -14, -16, to -19, -21, and -27 and Toho-2. Finally, group V includes CTX-M-25 and -26. We were unable to obtain a strain producing any group V enzymes.
↵b These strains are part of an unpublished isogenic panel. The original strains producing these β-lactamases were provided to the Center for Research in Anti-Infectives and Biotechnology by the referenced authors listed in the table.