Table 3.
Occurrence of bla genes in Salmonella isolates from different sources with reduced susceptibility to beta-lactam antimicrobials
| Source | Total no. of isolates | aResistant to ≥ one of beta-lactams (%) | bla genes detectedb | Not detected | No.(%) positive for bla genes | ||
|---|---|---|---|---|---|---|---|
| blaTEM | blaOXA10 | blaCTX-M | |||||
| Cattle | 50 | 16(32) | 12 | - | - | 4 | 8(75) |
| Poultry | 26 | 13(50) | 12 | - | 1 | 12(92.3) | |
| Swine | 8 | 2(25) | 1 | - | - | 1 | 1(50) |
| Human | 68 | 12(17.7) | 9 | 1 | 1 | 2 | c10(83.3) |
| Total | 152 | 43(28.3) | 34 | 1 | 1 | 8 | 34(79.1) |
aAmpicillin, Cephalothin, Cefoxitin, Ceftriaxone, amoxicillin and clavulanic acid
bThough all isolates were screened for blaSHV, blaOXA1, blaOXA4, blaPER, blaPSE and blaCMY2, none of them were positive for these genes
c blaOXA10 and blaCTX-M-15 were detected in a single isolate