Genetic Classification and Antimicrobial Resistance of Ureaplasma urealyticum Isolated from Urine.
10.4167/jbv.2012.42.2.156
- Author:
Myungwon CHOI
1
;
Indal PARK
Author Information
1. Department of Microbiology and Research Institute for Antimicrobial Resistance, Kosin University College of Medicine, Busan, Korea. microdal@kosin.ac.kr
- Publication Type:Original Article
- Keywords:
Ureaplasma parvum;
Ureaplasma urealyticum;
tet(M);
Fluoroquinolones;
Mutation
- MeSH:
Aza Compounds;
Drug Resistance, Microbial;
Fluoroquinolones;
Genetic Markers;
Microbial Sensitivity Tests;
Ofloxacin;
Polymerase Chain Reaction;
Quinolines;
Tetracycline;
Tetracycline Resistance;
Ureaplasma;
Ureaplasma urealyticum
- From:Journal of Bacteriology and Virology
2012;42(2):156-161
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Recently, polymerase chain reaction (PCR)-based methods have been used to reclassify Ureaplasma urealyticum into two independent species (spp.), designating U. parvum and U. urealyticum. In the current study, we aim to reclassify U. urealyticum and to analyze the correlation between the presence of a genetic marker and an antibiotic resistance of U. urealyticum. Susceptibility test against tetracycline, levofloxain or moxifloxacin was performed by broth microdilution method. The presence of tet(M) gene and the mutations of quinolone resistance-determining regions (QRDRs) were analyzed by PCR and sequencing. Among fourteen Ureaplasma isolates, three were identified as U. parvum and eleven were identified as U. urealyticum, and this is first report showing that two independent spp. of U. urealyticum isolated from Korean are present. The minimum inhibitory concentration (MIC) ranges for Ureaplasma isolates were as follows: tetracycline 0.25~128 microg/ml, levofloxacin 1~8 microg/ml, and moxifloxacin 0.5~4 microg/ml. The tet(M) determinant was found in 3 among 14 Ureaplasma isolates with tetracycline MIC of >16 microg/ml, suggesting that the presence of the tet(M) determinant is associated with tetracycline resistance. Mutations of gyrA, gyrB, parC, and parE genes in the QRDRs were found in 3 among 14 Ureaplasma isolates, exhibiting only parE gene mutation is associated with fluoroquinolone resistance.
