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Influence of breed (A) and susceptibility to infection (B) on the anti-B. abortus antibody titers in sera of experimentally infected animals. The points are the mean ± SD of IP (Inhibition Percentage), R = resistant, S = susceptible. The curves in panel A contain the combined results for resistant and susceptible animals for each breed, and whether the curves for resistant and susceptible animals in the right-hand panel contain both BON and Zebu animals.
