Abstract
Bovine field serums from the Australian brucellosis eradication program were used to compare 2 enzyme linked immunosorbent assays (ELISA) with the complement fixation test (CFT) and Rose Bengal test (RBT). One ELISA used an anti-bovine IgG horseradish peroxidase conjugate (ELISA 1) and the other a monoclonal anti-bovine Ig alkaline phosphatase conjugate (ELISA 2). When compared with the CFT, the ELISA 2 like the ELISA 1 lacked specificity in B. abortus vaccinated herds but the ELISA 2 was more specific than the ELISA 1 in previously infected herds and equally as specific as the ELISA 1 in nonvaccinated Brucella free herds. In this study the ELISA 2 proved more sensitive than the CFT, RBT and ELISA 1 particularly in herds where B. abortus biotype 2 was present. The value of using the ELISA 2 in conjunction with the CFT in an eradication program is discussed.
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