It was proved that Listeria innocua is able to hemolyze rabbit erythrocytes in blood agars when Oxoid or Difco nutrient agars are used as basic substrate. After 48 h incubation at 37 degrees C and a further 24 h at 4 degrees C the hemolytic effect was clearly expressed. The hot-cold incubation was inevitable. Unlike the hemolytic effect of L. monocytogenes, the hemolytic phenomenon of L. innocua was not enhanced by the equi-factor.
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