rpoB mutations in multidrug-resistant strains of Mycobacterium tuberculosis isolated in Italy

被引:78
作者
Pozzi, G
Meloni, M
Iona, E
Orrù, G
Thoresen, OF
Ricci, ML
Oggioni, MR
Fattorini, L
Orefici, G
机构
[1] Univ Siena, Dipartimento Biol Mol, Sez Microbiol, I-53100 Siena, Italy
[2] Univ Cagliari, Dipartimento Sci Chirurg, Cagliari, Italy
[3] Ist Super Sanita, Batteriol & Micol Med Lab, I-00161 Rome, Italy
关键词
D O I
10.1128/JCM.37.4.1197-1199.1999
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Mutations of rpoB associated with rifampin resistance were studied in 37 multidrug-resistant (MDR) clinical strains of Mycobacterium tuberculosis isolated in Italy. At least lone mutated codon was found in each MDR strain. It was always a single-base substitution leading to an amino acid change. Nine different rpoB alleles, three of which had not been reported before, were found. The relative frequencies of specific mutations in this sample were different from those previously reported from different geographical areas, since 22 strains (59.5%) carried the mutated codon TTG in position 531 (Ser-->Leu) and 11 (29.7%) had GAC in position 526 (His-->Asp).
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页码:1197 / 1199
页数:3
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