Novel mechanism of macrolide resistance in Streptococcus pneumoniae

被引:95
作者
Shortridge, VD [1 ]
Flamm, RK [1 ]
Ramer, N [1 ]
Beyer, J [1 ]
Tanaka, SK [1 ]
机构
[1] ABBOTT LABS,ABBOTT PK,IL 60064
关键词
D O I
10.1016/S0732-8893(96)00183-6
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
The mechanism of macrolide resistance was examined in 73 clinical isolates of Streptococcus pneumoniae. Two distinct resistance phenotypes were observed: high-level macrolides-lincosamides-streptogramin B (MLS) resistance and low-level macrolide resistance with lincosamide susceptibility. High-level MLS resistance was associated with the presence of ermAM. Strains with the low-level resistant phenotype (novel) were negative for ermA, ermC, ermAM, ereA, ereB and msrA by polymerase chain reaction (PCR) amplification with gene-specific primers. Ribosomes isolated from novel strains bound the same amount of [C-14]-erythromycin as ribosomes from sensitive strains. These novel strains also did not inactivate the macrolide. The novel mechanism was found in 41% of the erythromycin resistant S. pneumoniae examined. (C) 1996 Elsevier Science Inc.
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页码:73 / 78
页数:6
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