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  • Title: Hemolytic activity of Leptospira interrogans serovar canicola cultured in protein-free medium.
    Author: Yanagihara Y, Kojima T, Mifuchi I.
    Journal: Microbiol Immunol; 1982; 26(7):547-56. PubMed ID: 6813653.
    Abstract:
    Hemolytic activity of the culture supernatant of Leptospira interrogans serovar canicola strain Moulton grown in protein-free medium was demonstrated. The activity began to appear in the late logarithmic phase of growth of the organism and reached a plateau after 2 weeks of cultivation. It was inactivated by the addition of dipotassium ethylenediaminetetraacetate, but was effectively restored by Mg2+. Hemolysis by the culture supernatant was stimulated by "hot-cold" incubation. Sleep erythrocytes treated with the culture supernatant of the organism were transformed into spherocytes, in which invagination was observed. A hemolysis inhibitor in rabbit serum was found to be in the chloroform-methanol soluble fraction of the serum. The hemolysin of Leptospira may be phospholipase C.
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