TABLE 2

Characteristics of β-lactamase and ESBL genes in two E. coli and three Klebsiella pneumoniae subsp. pneumoniae clinical mastitis isolates

IsolateaESBL/fluoroquinolone genes in the isolatesPresence of replicon type:ST by MLSTPhylogenetic group
blaCTX-MblaSHVblaTEMblaQnrSB/OP1K/BFIBI1F
25 (K. pneumoniae)SHV-12TEM-1++
26 (E. coli)CTX-M-15TEM-1++++ST88A
27(K. pneumoniae)SHV-12TEM-1++
28 (K. pneumoniae)SHV-12TEM-1++
32 (E. coli)CTX-M-15TEM-1++++A
26CCTX-M-15TEM-1++
28C+
32CCTX-M-15TEM-1++
K-12+
  • a 25, 26, 27, 28, and 32 correspond to 25(2053), 26(2104A), 27(2104B), 28(2104C), and 32(2188), respectively. Isolates 25, 26, 27, 28, and 32 are original isolates; isolates 26C, 28C, and 32C are transconjugants; and K-12 is the E. coli recipient strain.