[Procoagulant activity in swine leukocytes, infected with the swine classical plague virus]

An increased level of the procoagulant activity (PCA) has been observed in porcine leukocytes in vitro infected with virulent or vaccine strains of hog cholera virus in comparison with intact cells. PCA was similarly induced in infected leukocytes from swine immune to hog cholera virus. Increased PCA levels were detected in culture medium with leukocytes from intact and immune animals infected in vitro with both virulent and vaccine strains of hog cholera virus in comparison with the PCA levels in culture medium with intact cells.