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  • Title: Characterization of atypical Listeria innocua isolated from swine slaughterhouses and meat markets.
    Author: Moreno LZ, Paixão R, Gobbi DD, Raimundo DC, Ferreira TP, Hofer E, Matte MH, Moreno AM.
    Journal: Res Microbiol; 2012 May; 163(4):268-71. PubMed ID: 22426248.
    Abstract:
    Atypical Listeria innocua strains presenting phenotypic characteristics similar to those of Listeria monocytogenes were recently isolated from food and the environment. These isolates also tested positive for virulence genes specific to L. monocytogenes. Here we report the isolation of atypical hemolytic L. innocua strains from the environment of pork processing plants in Brazil. The strains were positive for L. monocytogenes virulence genes hly, inlA and inlB by PCR and presented genotypic similarities with human isolates of L. monocytogenes via the AFLP technique using HindIII single enzyme protocol. Phenotypic and genotypic similarities suggest that these atypical L. innocua may be pathogenic strains.
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