Emergence of clinical strains of Mycoplasma genitalium harbouring alterations in ParC associated with fluoroquinolone resistance.
Surveillance for antimicrobial resistance in Mycoplasma genitalium clinical strains is extremely limited as culturing of strains from clinical specimens is still difficult. We therefore conducted a non-cultural assessment of fluoroquinolone resistance of M. genitalium clinical strains by analysing the quinolone-resistance determining regions (QRDRs) of the gyrA and parC genes. The QRDRs amplified from M. genitalium DNA taken from urine specimens of 28 men with non-gonococcal urethritis positive for M. genitalium by polymerase chain reaction were sequenced. An amino acid change (Phe-108-->Iso) in GyrA was found in one specimen, and the same change was accompanied by an amino acid change (Lys-97-->Arg) in ParC in another specimen. A single amino acid change (Ser-83-->Asn, Asp-87-->Tyr or Asp-87-->Val) in ParC was also found in three other respective specimens without alterations in GyrA. No alterations in GyrA and ParC were found in the remaining 23 specimens. The alterations of Ser-83-->Asn, Asp-87-->Tyr and Asp-87-->Val in ParC found in 3 (10.7%) of 28 specimens were analogous to those commonly observed in fluoroquinolone-resistant mutants of other Mycoplasma and Ureaplasma spp. M. genitalium harbouring mutations associated with fluoroquinolone resistance in the parC gene may have emerged clinically and the prevalence may be ca. 10% in Japan.
Shimada
Yasushi
Y
Department of Urology, Graduate School of Medicine, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan.
Deguchi
Takashi
T
Nakane
Keita
K
Masue
Takako
T
Yasuda
Mitsuru
M
Yokoi
Shigeaki
S
Ito
Shin-ichi
S
Nakano
Masahiro
M
Ito
Shin
S
Ishiko
Hiroaki
H
D019943:Amino Acid Substitution / Q000235:genetics; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics*; D027081:DNA Gyrase / Q000235:genetics; D027101:DNA Topoisomerase IV / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics; D024881:Drug Resistance, Bacterial; D024841:Fluoroquinolones / Q000494:pharmacology*; D006801:Humans; D007564:Japan; D008297:Male; D020125:Mutation, Missense; D009175:Mycoplasma Infections / Q000382:microbiology; D045704:Mycoplasma genitalium / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D014526:Urethritis / Q000382:microbiology
D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D024841:Fluoroquinolones; D027101:DNA Topoisomerase IV; D027081:DNA Gyrase