Abstract
Calves inoculated with Brucella abortus S45/20 produced, against surface antigens, non-agglutinating antibodies (NAAb) which were isolated and purified. A kinetic analysis was carried out of NAAb in antibody-dependent cell-mediated cytotoxicity (ADCC) using sheep red blood cells labelled with surface antigen from B. abortus S45/20 as target cells. Three parameters were examined: time of incubation, effector cell:target cell (E:T) ratio and NAAb dose. It was found that the NAAb were not able to mediate ADCC with bovine spleen cells.
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