Einige Eigenschaften der Keimträgerstämme vonListeria monocytogenes

About 60 characteristics have been investigated in 7 hemolyzing and 12 non-hemolyzing strains ofL. monocytogenes. From these investigations resultedinter alia that the organism grows well under strictly anaerobic conditions, esculin is split at 45°C, NH₃ is produced from peptone, but not from arginin, and H₂S can be traced by sufficiently sensitive methods. All strains possess a lipase, muramidase, and deoxyribonuclease, the hemolytic ones only also a lecithinase. Besides, the hemolytic strains only dispose of experimental virulence and of a CAMP factor-like agent. The experimental animal of choice seems to be the conjunctivally infected guinea pig in which a generalized infection develops.