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Effect of day relative to Mannheimia haemolytica vaccination given on day 34 on serum haptoglobin and serum amyloid A (SAA) concentrations of newly weaned beef steers (day P < 0.01; different superscripts indicate difference between days P ≤ 0.05). Data from blood samples taken prior to vaccination used as a covariate in analysis (day 0 values based on excel means). Natural log transformed; back-transformed means and SEM presented.
