The capsular polysaccharide and lipopolysaccharide structures of two carbapenem resistant Klebsiella pneumoniae outbreak isolates.

The capsular polysaccharide and lipopolysaccharide structures of two carbapenem resistant Klebsiella pneumoniae outbreak isolates.
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DOI:
10.1016/j.carres.2012.12.018
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发表时间:
2013-03-22
影响因子:
3.1
通讯作者:
Schneerson, Rachel
Schneerson, Rachel
中科院分区:
化学3区
文献类型:
--
作者:
Kubler-Kielb, Joanna;Vinogradov, Evgeny;Ng, Weng-Ian;Maczynska, Beata;Junka, Adam;Bartoszewicz, Marzenna;Zelazny, Adrian;Bennett, John;Schneerson, Rachel

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碳青霉烯类耐药肺炎克雷伯菌(CRKP)的分离频率越来越高,尤其是从免疫功能低下的患者中分离。未确定CPKP的荚膜多糖(CPS)类型。对来自美国国立卫生研究院临床中心2011年爆发的两株CRKP分离株的调查发现,这两株分离株共有一种新的荚膜类型,与K.肺炎克雷伯氏菌K19和K34,但在结构上不同于任何已发表的克雷伯氏菌。pneumoniae CPS重复单元:两株菌的LPS均不含O-特异性多糖,其核心寡糖的化学结构与已发表的数据一致。如果这种结构类型在CPKP分离株中普遍存在,我们的研究结果可以促进快速诊断,并有助于开发针对这种抗生素耐药病原体的新治疗方案。
Carbapenem resistant Klebsiella pneumoniae (CRKP) are isolated with increasing frequency, especially from immunocompromized patients. The capsular polysaccharide (CPS) types of CPKP were not determined. Investigation of two CRKP isolates from a 2011 outbreak at the Clinical Center, the National Institutes of Health, identified a new capsular type shared by the two isolates, similar to K. pneumonia K19 and K34 but structurally different than any published K. pneumoniae CPS repeating unit: The LPS of the two isolates was found to have no O-specific polysaccharide and the chemical structure of the core oligosaccharides agreed with published data. If this structure type will be prevalent among CPKP isolates, our findings could facilitate rapid diagnosis and help develop new therapeutic solutions to this antibiotic resistant pathogen.
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