Volume 20, Number 5—May 2014
Extended-Spectrum β-Lactamases in Escherichia coli and Klebsiella pneumoniae in Gulls, Alaska, USA
|Isolates, no.†||bla genotype
*ESBL, extended-spectrum β-lactamase; MLST, multilocus sequence type; ST, sequence type; ND, no data.
†E. coli comprised 33 isolates from 32 samples. K. pneumoniae comprised 35 isolates from 35 samples. and 12 samples were both E. coli and K. pneumoniae ESBL-harboring isolates but did not display horizontal transfer resulting from deviating resistance genotypes.
‡One of the isolates harbored a novel MLST allele, giving the novel ST2253 (deposited in the E. coli MLST database at the ERI, University College, Cork, Ireland, UK (http://mlst.ucc.ie/mlst/mlst/dbs/Ecoli/).
§One of the isolates had ST10; the remaining 10 had ST131.
¶Isolates harbored a novel MLST allele, rendering the novel ST2967 (deposited in the MLST database). The single isolate with only blaTEM-1 may contain undetected ESBL genes because of the non-ESBL phenotype of TEM-1.