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Volume 10, Number 1—January 2004

Research

Escherichia coli Producing CTX-M-2 β-Lactamase in Cattle, Japan

Yutaka Shiraki*Comments to Author , Naohiro Shibata†, Yohei Doi†, and Yoshichika Arakawa†
Author affiliations: *Gifu Prefectural Office of Meat Inspection, Gifu, Japan; †National Institute of Infectious Diseases, Tokyo, Japan

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Table 3

Characteristics of CTX-M-2 β-lactamase-producing Escherichia coli isolated from cattlea

Strain Source β-lactamaseb Plasmid profile (MDa) Transferred
plasmid (MDa) Frequency
of transfer RAPD pattern
GS528 Feces 1 PC 33, 50, 86 33, 50 6 x 10-4 A
GS542 Feces 2 PC 33, 50, 86 33, 50 2 x 10-4 A
GS547 Feces 3 PC 33, 50, 86 33, 50 3 x 10-4 A
GS553 Feces 4 PC and CS 33, 50, 61 33, 50 3 x 10-1 B
GS554 Feces 4 PC and CS 33, 50 33, 50 2 x 10-1 C
GS721 Feces 5 PC 33 33 9 x 10-2 D
GS733 Feces 6 PC 33 33 2 x 10-1 D
GS631 Swabc 1 PC 33, 86 33 5 x 10-1 E
GS671 Swab 2 PC 33, 86 33 6 x 10-1 E

aPC, penicillinase; CS, cephalosporinase; RAPD, random amplified polymorphic DNA.
bβ-lactamases were detected by acidmetric β-lactamase test.
cSwab, surface swab of cattle carcass.

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