Isolation and characterization of Listeria monocytogenes isolates from ready-to-eat foods in Florida |
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Authors: | Shen Yuelian Liu Yan Zhang Yifan Cripe Jennifer Conway William Meng Jianghong Hall Grace Bhagwat Arvind A |
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Affiliation: | Florida State Department of Agriculture and Consumer Services, Tallahassee, Florida, USA. |
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Abstract: | Of 3,063 ready-to-eat food samples tested, 91 (2.97%) were positive for Listeria monocytogenes, and lineage 1 strains outnumbered lineage 2 strains 57 to 34. Seventy-one isolates (78%) exhibited multiple antibiotic resistance, and an L. monocytogenes-specific bacteriophage cocktail lysed 65 of 91 (71%) isolates. Determining phage, acid, and antibiotic susceptibility phenotypes enabled us to identify differences among strains which were otherwise indistinguishable by conventional methods. |
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