Abstract
Lymphocytes from Brucella abortus field strain infected, strain 19 vaccinated, non-exposed and field strain infected, but immunologically unresponsive cattle were incubated with B. abortus antigen and indomethacin. There were significant increases (P < 0.005) in the blastogenic responses, as measured by [ 3H] thymidine uptake, in cultures with indomethacin as compared to cultures without indomethacin. Lymphocyte blastogenic responses to B. abortus antigen were potentiated by indomethacin in both B. abortus exposed and non-exposed cultures. However, potentiation of sensitized lymphocyte blastogenic responses by indomethacin was significantly greater (P < 0.005) than that in non-exposed lymphocytes. Additionally, indomethacin significantly potentiated Brucella-induced lymphocyte blastogenic responses in lymphocytes from anergic cattle.
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