Development of a pyrosequencing assay for rapid assessment of quinolone resistance in Acinetobacter baumannii isolates

Rapid and reliable assessment of Acinetobacter baumannii resistance to quinolones was successfully achieved through pyrosequencing of the gyrA and parC quinolone-resistance determining regions. A strong correlation was found between quinolone resistance and mutations in gyrA codon 83 and/or in the parC gene (codons 80 or 84). Absence of QRDR mutations was associated with susceptibility to quinolones.