Point Mutation in the Group B Streptococcal pbp2x Gene Conferring Decreased Susceptibility to β-Lactam Antibiotics

Point Mutation in the Group B Streptococcal pbp2x Gene Conferring Decreased Susceptibility to β-Lactam Antibiotics
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B 组链球菌 pbp2x 基因中的点突变导致对 β-内酰胺抗生素的敏感性降低

DOI:
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发表时间:
2008
影响因子:
4.9
通讯作者:
B. Beall
B. Beall
中科院分区:
医学2区
文献类型:
--
作者:
Samira Dahesh;M. Hensler;N. V. van Sorge;R. Gertz;S. Schrag;V. Nizet;B. Beall

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摘要β-内酰胺类抗生素(BLAS)是治疗B组链球菌(GBS)感染的一线药物。一组由四个独立的侵袭性GBS分离株组成的克隆集被鉴定出来,它们的MIC对BLAS的最低抑菌浓度升高,它们共享一个与肺炎球菌耐药突变相对应的pbp2x突变(Q557E)。通过等位基因替换或与野生型pbp2x互补来恢复血乳酸敏感性。
ABSTRACT Beta-lactam antibiotics (BLAs) are the first-line agents used against group B streptococci (GBS) infection. A clonal set of four independent, invasive GBS isolates with elevated MICs to BLAs were identified that shared a pbp2x mutation (Q557E) corresponding to a resistance-conferring pneumococcal mutation. BLA sensitivity was restored through allelic replacement or complementation with the wild-type pbp2x.
DOI: 10.1172/jci23829
发表时间: 2005-09-01
影响因子: 15.9
作者:
Doran, KS;Engelson, EJ;Nizet, V
通讯作者: Nizet, V