Literature DB >> 22923408

Molecular characterization of fluoroquinolone-resistant Aeromonas spp. isolated from imported shrimp.

Zakiya Shakir1, Saeed Khan, Kidon Sung, Sangeeta Khare, Ashraf Khan, Roger Steele, Mohamed Nawaz.   

Abstract

Sixty-three nalidixic acid-resistant Aeromonas sp. isolates were obtained from imported shrimp. Phylogenetic analysis of gyrB sequences indicated that 18 were A. enteropelogenes, 26 were A. caviae, and 19 were A. sobria. Double missense mutations in the quinolone resistance-determining region (QRDR) of gyrA at codon 83 (Ser→Val/Ile) and codon 92 (Leu→Met) coupled with a point mutation of parC at codon 80 (Ser→Ile/Phe) conferred high levels of quinolone resistance in the isolates. A majority of A. enteropelogenes and A. caviae strains harbored toxin genes, whereas only a few A. sobria strains harbored these genes. The fluoroquinolone-resistant Aeromonas spp. exhibited higher cytotoxicity than fluoroquinolone-sensitive, virulent Aeromonas spp. to rat epithelial cells.

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Year:  2012        PMID： 22923408      PMCID： PMC3485934          DOI： 10.1128/AEM.02081-12

Source DB:  PubMed          Journal:  Appl Environ Microbiol        ISSN： 0099-2240            Impact factor:   4.792


  24 in total

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Journal:  Microbes Infect       Date:  1999-11       Impact factor: 2.700

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3.  Impact of gyrA and parC mutations on quinolone resistance, doubling time, and supercoiling degree of Escherichia coli.

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10.  A type VI secretion system effector protein, VgrG1, from Aeromonas hydrophila that induces host cell toxicity by ADP ribosylation of actin.

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