The O | 合法醫療器材資訊網
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![The O](https://i.imgur.com/6y29Lx7.jpg)
Group D and group B Salmonella enterica serovars differ in their susceptibility to colistin with the former frequently intrinsically resistant (MIC > 2 μg/ml); however, the mechanism has not been described. Here, we show that the O-antigen epitope in group D Salmonella governs the levels of colistin susceptibility. Substitution of the rfbJ gene in a group B Salmonella with the rfbSE genes from a group D Salmonella conferred a decrease in susceptibility to colistin. The presence of dideoxyhexose, abequose, and the deoxymannose, tyvelose, differentiate the Salmonella group B and group D O antigens, respectively. We hypothesize that the subtle difference between abequose and tyvelose hinders the colistin molecule from reaching its target. Whole-genome sequencing also revealed that increased colistin susceptibility in a group D Salmonella veterinary isolate was due to a defect in the O-antigen polymerase protein,...
O Antigen | 合法醫療器材資訊網
O | 合法醫療器材資訊網
The O | 合法醫療器材資訊網
Genetics of O | 合法醫療器材資訊網
Note | 合法醫療器材資訊網
The O | 合法醫療器材資訊網
Structure of O | 合法醫療器材資訊網
Salmonella O Antigen Group A | 合法醫療器材資訊網
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