Volume 10, Number 1—January 2004
Research
Escherichia coli Producing CTX-M-2 β-Lactamase in Cattle, Japan
Table 1
Number of β-lactamase producers isolated from cattlea
Sample (no.) | Species | Acidmetric β-lactamase test | PCR typing | |||
---|---|---|---|---|---|---|
Total | PC | PC and CS | CS | |||
Feces (396) | Escherichia coli | 32 | 7 | 19 | 6 | 7 (CTX-M-2) |
Citrobacter koseri | 2 | 2 | 0 | 0 | 0 | |
Swabb (270) | E. coli | 5 | 2 | 2 | 1 | 2 (CTX-M-2) |
C. freundii | 1 | 0 | 1 | 0 | 0 |
aPC, penicillinase; CS, cephalosporinase; PCR, polymerase chain reaction.
bSwab, surface swab of cattle carcass.