Karen Wedekind

Background and objectives Pharmacological levels of zinc oxide (ZnO) are widely used in the weaning pig diets to promote growth and prevent post-weaning diarrhea. This practice is not environmentally sustainable; therefore, an effective alternative is warranted to be investigated. The objective of this study is to evaluate supplementation of Zn as Zn methionine hydroxy analogue chelate (Zn-MHAC, ...

Trypsin inhibitors (TI) and urease activity (UA) are the two most relevant quality measurements for soybean products as feed ingredients for animals. TI were reported to be correlated with UA, so feed processing plants use UA as an indicator of TI in soybean meal (SBM). The objectives of this study were to determine the levels of TI and UA in 414 SBM samples from 19 different countries in 5 world ...

Abstract A battery study was conducted to evaluate the efficacy of phytase superdosing in improving growth performance, pancreatic response, and nutrient digestibility of broilers with a high trypsin inhibitor model. There were 5 dietary treatments: positive control (PC), negative control 1 (NC1), NC1+ 1500 U/kg phytase, negative control 2 (NC2), and NC2 + 1500 U/kg phytase. In NC1 and NC2, the S ...

Soybean products are the most important source of dietary protein for poultry in the US and much of the world. Variation in protein quality among soy ingredients can occur due to processing. Full fat extruded soybeans (FFES) are an alternative to conventional solvent-extracted soybean meal (SBM), but may have higher levels of trypsin inhibitors (TI). The use of exogenous protease in poultry diets ...

Copper (Cu) has been widely used at pharmacological levels (e.g., 125 ppm) as growth promoter in poultry. However, the mechanism by which high levels of Cu promote growth remains to be determined. It is commonly recognized that Cu exerts anti-microbial effects in the gut but there is not much direct and consistent data showing that Cu alters the population of bacterial species in birds. The object ...