title: [Special position of strongly haemolytic strains of the genus Listeria].
abstract: The special status of the strongly haemolytic strains of serovar (sv) 5 of Listeria monocytogenes is reviewed. Besides some biochemical reactions sv 5 strains are characterized by their excessive haemolysis on sheep blood agar and by a positive result of the CAMP test with R. equi. The haemolysis is caused by a soluble thermolabile protein which stimulates the formation of antibodies and which is inhibited by cholesterol. Sv 5-strains are less virulent than strains of sv 1/2a and sv 4b. The antibiotic sensitivity patterns characteristic for listeriae and for the principles of treating Listeria infections, are valid for sv 5-strains, too. The special position of sv 5 versus the other serovars of L. monocytogenes - with particular reference to its biochemical activity, its haemolytic properties, its lysosensitivity and its pathogenicity - calls for a reconsideration of its taxonomic position within the genus Listeria.
mesh_terms: D000942:Antigens, Bacterial / Q000276:immunology; D001435:Bacteriophages; D006460:Hemolysin Proteins / Q000032:analysis; D006461:Hemolysis; D006801:Humans; D008089:Listeria monocytogenes / Q000145:classification* / Q000472:pathogenicity / Q000502:physiology; D008088:Listeriosis / Q000188:drug therapy / Q000382:microbiology; D012703:Serotyping
chemical_list: D000942:Antigens, Bacterial; D006460:Hemolysin Proteins
vernacular_title: Zur Sonderstellung stark hämolysierender Stämme der Gattung Listeria.