Detection of type III secretion system virulence and mutations in gyrA and parC genes among quinolone-resistant strains of Pseudomonas aeruginosa isolated from imported shrimp.

Abstract excerpt

Twenty Pseudomonas aeruginosa isolates were recovered from imported frozen raw shrimp sold in the United States. Isolates were tested for antimicrobial susceptibility to quinolones and analyzed for mutations in quinolone resistance-determining regions, presence of type III secretion system genes, and genetic relatedness using pulsed-field gel electrophoresis. All isolates were resistant to nalidixic acid....

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