Hello, this is Charmaine Espinosa and thank you for your interest in this poster that was presented at the Midwest meeting. This presentation provides an overview about an experiment that we have conducted, which focuses on 2 sources of spray-dried plasma protein and how these sources influence growth performance of weanling pigs.

As most of you may know, spray-dried plasma protein is commonly used in weanling diets due its functional components and high concentration of digestible amino acids. Hydrolyzed spray-dried bovine plasma is a new source of spray-dried plasma protein; however, data are limited to demonstrate the efficacy of this novel ingredient. We have observed in several previous experiments that spray-dried plasma protein have increased growth performance when exposed to a challenge model; therefore, it is possible that Hydrolyzed spray-dried bovine plasma improves performance of pigs similarly to other sources of spray-dried plasma protein. Therefore, this experiment was conducted to test 2 hypotheses: First, is that Hydrolyzed spray-dried bovine plasma increases growth performance of pigs housed in uncleaned pens. And the second hypothesis is that Hydrolyzed spray-dried bovine plasma is as effective as spray-dried bovine plasma in increasing pig growth performance.
In this experiment, we have 2-phase feeding programs. In Phase 1, we have 5 experimental diets. A basal diet was formulated based on corn, soybean meal, and 90 g/kg soy protein concentrate. Four diets containing either spray-dried bovine plasma or Hydrolyzed spray-dried bovine plasma that partially or fully replaced soy protein concentrate were also formulated. The analyzed concentration of amino acids in the two plasma sources were used to formulate diets, and because of the reduced amino acid concentration in Hydrolyzed spray-dried bovine plasma, dietary inclusion of Hydrolyzed spray-dried bovine plasma was greater compared with the other source of plasma protein. As a result, four diets were formulated by adding 2.5 or 5.0 percent spray-dried bovine plasma or by adding 2.8 or 5.6 percent Hydrolyzed spray-dried bovine plasma to the diets at the expense of soy protein concentrate. In phase 2, on the other hand, a common corn- soybean meal diet was fed to pigs. 240 weanling pigs were used and were placed in uncleaned pens throughout the experiment. These pigs were allotted to 5 dietary treatments in a randomized complete block design. Experimental diets were only fed to pigs during the first 14 days of the experiment. And a common phase 2 were fed to pigs on d 15 to 42. Pig weights and feed allotments were recorded at the beginning of the experiment, and at the end of each phase for us to be able to calculate growth performance parameters. 
And as we go through the results:
Figure 1 shows the average daily gain of pigs fed the experimental diets during phase 1. The x-axis here represents the dietary treatments, and the y-axis here represents our response parameter. Here we can observe that fully replacing soy protein concentrate with either of the 2 sources of plasma protein increased average daily gain of pigs. Linear increase in average daily gain was also observed as dietary concentrations of plasma sources increased. For feed intake, not much influence of the plasma sources here but if we take a look at G:F shown in figure 3, we can observe the same result as average daily gain where feed efficiency linearly increased as spray-dried bovine plasma or Hydrolyzed spray-dried bovine plasma increased in the diet. And at the end of the experiment, on day 42, the positive effect of plasma sources can still be observed where can still see a linear increase in final body weight as dietary plasma sources increased. This increase in growth performance is possibly due to immunoglobulins and growth factors present in these plasma sources and this could have positively impacted gastrointestinal health and immune function of pigs housed in unsanitary conditions. 
In summary, we have demonstrated that the new source of plasma protein increased pig growth performance and this novel Hydrolyzed spray-dried bovine plasma is as effective as your good old spray-dried bovine plasma in positively influencing growth performance of pigs exposed in a challenge model. Thank you for your interest in this presentation and if you want to know more topics about pig nutrition you can always visit our website nutrition.ansci.illinois.edu