Phenotypic and genotypic characterization of atypical Listeria monocytogenes and Listeria innocua isolated from swine slaughterhouses and meat markets.

ABSTRACT: In the last decade, atypical Listeria monocytogenes and L. innocua strains have been detected in food and the environment. Because of mutations in the major virulence genes, these strains have different virulence intensities in eukaryotic cells. In this study, we performed phenotypic and genotypic characterization of atypical L. monocytogenes and L. innocua isolates obtained from swine slaughterhouses and meat markets. Forty strains were studied, including isolates of L. monocytogenes and L. innocua with low-hemolytic activity. The isolates were characterized using conventional phenotypic Listeria identification tests and by the detection and analysis of L. monocytogenes-specific genes. Analysis of 16S rRNA was used for the molecular identification of the Listeria species. The L. monocytog

SUBMITTER: Moreno LZ 

PROVIDER: S-EPMC4058478 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature