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The aim of this study was to compare the immunostimulatory properties of Lkt of M. haemolytica inactivated by formaldehyde and glutaraldehyde and to evaluate the neutralizing properties of anti-Lkt antibodies. The experiment was conducted on 20 Black-and-White Lowland calves of 100 kg body weight, assigned to 4 experimental groups. The animals were given subcutaneous vaccine injections with native...
Mannheimia haemolytica leukotoxin (Lkt) is the major factor that contributes to lung injury in bovine pneumonic pasteurellosis. Supernatant preparations containing Lkt produced by M. haemolytica serotype 1, grown in RPMI 1640 medium supplemented with BSA or FBS and without supplements were evaluated during this study. Analysis of obtained Lkt showed presence of 105kDa antigen (SDS-PAGE electrophoresis)...
In the contemporary systems of cattle production, transport stress is the most essential polyetiological factor responsible for inducing unfavourable reactions in the animals. The main reason for this phenomenon is the immunosuppressive effect of steroid hormones on cellular and humoral protective mechanisms. The purpose of the present study was to establish the relationship between the Cortisol concentration...
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