BioMed Research International

Research Article

Phenotypic and Genotypic Characterization of Atypical Listeria monocytogenes and Listeria innocua Isolated from Swine Slaughterhouses and Meat Markets

Table 2

Sources and phenotypic and genotypic characteristics of the Listeria innocua isolates used in this study.
IsolateSpeciesSerotypeOriginSiteYearALOAHemolysis inlB inlC inlJ plcA plcB prfA
Lin5 L. innocua 6aMarket 1Floor2008Halo Weak positive −−+−+−−+
Lin6 L. innocua 6aSlaught 2Floor2008Halo Weak positive −−+−+−−+
Lin7 L. innocua 6aSlaught 2Floor2008Halo Weak positive −−+−+−−+
Lin8 L. innocua 6aSlaught 2Floor2008Halo Weak positive −−+−+−−+
Lin9 L. innocua 6aSlaught 2Floor2008Halo Weak positive −−+−+−−+
Lin16 L. innocua 6aSlaught 1Floor2006NegativeNegative−−−−−−−−
Lin17 L. innocua 6aSlaught 1Floor2006NegativeNegative−−−−−−−−
Lin18 L. innocua 6aSlaught 1Floor2006NegativeNegative−−−−−−−−
Lin19 L. innocua 6aSlaught 1Floor2006NegativeNegative−−−−−−−−
Lin20 L. innocua 6aSlaught 1Floor2006NegativeNegative−−−−−−−−
Lin11 L. innocua 6aATCC 33090——NegativeNegative−−−−−−−−
Lin46 L. innocua 6aCLIP 12612——NegativeNegative−−−−−−−−
Slaught 1: slaughterhouse 1; Slaught 2: slaughterhouse 2. Subtle halo. Very weak positive hemolysis. Atypical isolates were positive for fragments of inlAB operon and hly but presented variable results for inlA and hly complete amplification (see Table 4).