Figure 1. Plasma haptoglobin concentrations in pigs fed b-glucan and challenged with S. suis. Haptoglobin concentration is expressed as amount of methemoglobin bound (mgHgb) per milliliter. Pigs were fed diets supplemented with .025 and .05% b-glucan for 4 wk and inoculated intravenously with S. suis, serotype 2 (6.5 × 108 cfu) at d 28. Values are means ± SEM, n = 10. Means within day without a common superscript differ; a,b P < .05 and c,dP < .10.