*Not properly differentiated by previous type-specific #selleck kinase inhibitor randurls[1|1|,|CHEM1|]# PCR assays, 1phylogenetic group, 2PCR result by CdtIII/VB-F and CdtIIIC-R primers, 3PCR result by CdtIII/VB-F and CdtVC-R primers, 4PCR result by Cdt-IIIAf and Cdt-IIIACr primers 5PCR result by P2-A2 and cdtA-F primers, 6PCR result by cdtC-F and P2-C3 primers, 7not done, 8genes for DEC, 9genes for Adhesin, 10gene for NTEC, 11eae-θ/γ2, 12No. of positive strains, 13No. of tested strains, 14identified as Escherichia albertii. Figure 1 Schematic representation of PCR
primer binding region of type specific PCR for cdt-III and cdt-V . White (Cdt-IIIAf, Cdt-IIICr and CdtIIIC-R), black (CdtVC-R, P2-A2, cdtA-F, cdtC-F and P2-C3) and gray (CdtIII/VB-F) arrows indicate PCR primers which specifically bind to cdt-III, cdt-V and both cdt-III and cdt-V genes, respectively. Identification of CTEC All cdtB gene-positive isolates from cattle and swine were confirmed as E. coli by biochemical
tests except for a cdt-II gene-positive strain from swine (strain Sw-9). By API 20E testing, the strain Sw-9 was identified as E. coli (74.6%) with a doubtful api profile of 51445021
(https://apiweb.biomerieux.com/jsp). most LXH254 However, unlike typical E. coli, strain Sw-9 was nonmotile at 37°C and indole-negative, did not ferment lactose and sucrose, and did not produce β-glucuronidase. Partial 16S rRNA gene sequence of strain Sw-9 was identical (452/452 bp; 100%) to that of E. albertii (GenBank: HM194884), but also highly similar to those of Shigella boydii (GenBank: AY696682; 451/452 bp [99.8%]) and E. coli (GenBank: GU237022; 450/452 bp [99.6%]). Sugar utilization tests of dulcitol, D-mannitol, D-melibiose, L-rhamnose and D-xylose also suggested that strain Sw-9 was E. albertii and not as E. coli[18, 19]. Multilocus sequence (MLS) analysis based on the nucleotide sequence variation at 7 housekeeping loci (a total of 3,423 bp) in the genome revealed that strain Sw-9 belongs to the E. albertii lineage (Figure 2), consistent with the data of biochemical tests and 16S rRNA gene sequencing. Considering these findings together, the strain Sw-9 was identified as E. albertii. Figure 2 Neighbor-joining tree based on nucleotide variation at 7 conserved housekeeping loci.