Project description:The newly identified plasmid-borne colistin resistance gene mcr-1 was found in a Kluyvera ascorbata isolate from hospital sewage in China. mcr-1 was carried by a 57-kb self-transmissible IncI2 plasmid. Unlike in a previous report, mcr-1 was not associated with ISApl1 and was inserted into a gene encoding a putative membrane protein by an unknown mechanism. This study highlights that mcr-1 has spread to multiple bacterial species.
Project description:The whole genome sequence of rare human pathogen Kluyvera ascorbata strain HAK22 is reported. The K. ascorbata HAK22 was isolated from healthy human from Gurugram, Haryana, India. The draft genome has a length of 4.7 Mbp, with 54.36% GC content and 4,411 proteins, 4,470 genes, and 18 antimicrobial resistance genes.
Project description:Kluyvera ascorbata produces a beta-lactamase that results in an atypical susceptibility pattern, including low-level resistance to penicillins, cephalothin, and cefuroxime, but this resistance is reversed by clavulanate. Ten nucleotide sequences of the corresponding gene, bla(KLUA), were obtained and were found to have minor variations (96 to 100%). Otherwise, bla(KLUA) was found to be similar (95 to 100%) to some plasmid-encoded CTX-M-type beta-lactamases. Finally, mobilization of bla(KLUA) on a plasmid was found to be mediated probably by a genetic mobile element like ISEcp1.
