Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc · 2017
High-resolution melting analysis of gyrA codon 84 and grlA codon 80 mutations conferring resistance to fluoroquinolones in Staphylococcus pseudintermedius isolates from canine clinical samples.
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Loiacono Monica, Martino Piera A, Albonico Francesca, Dell'Orco Francesca, Ferretti Manuela, Zanzani Sergio, Mortarino Michele
Аннотация
Staphylococcus pseudintermedius is an opportunistic pathogen of dogs and cats. A high-resolution melting analysis (HRMA) protocol was designed and tested on 42 clinical isolates with known fluoroquinolone (FQ) susceptibility and gyrA codon 84 and grlA codon 80 mutation status. The HRMA approach was able to discriminate between FQ-sensitive and FQ-resistant strains and confirmed previous reports that the main mutation site associated with FQ resistance in S. pseudintermedius is located at position 251 (Ser84Leu) of gyrA. Routine, HRMA-based FQ susceptibility profiles may be a valuable tool to guide therapy. The FQ resistance-predictive power of the assay should be tested in a significantly larger number of isolates.