The effect of mild coccidial vaccine challenge on apparent and standardized ileal amino acid digestibility in 21- and 42-d old broilers
Published: October 3, 2014
Summary
The objective of this study was to determine the effect of mild coccidial vaccine challenge on standardized ileal amino acid digestibility (SIAAD) in 21- and 42-d old broilers fed a corn-soybean meal-DDGS-poultry by-product meal based diet. The study was designed as a 2 x 2 factorial arrangement of treatments with 2 ages (d 21 and 42) and 2 levels of coccidial vaccine (Coccivac®B) challenge (...
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Authors:
Purdue University (USA)
Evonik Animal Nutrition
University of Georgia
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28 de octubre de 2014
The low level of EAA flow in birds could be attributed to several reasons. First, the presence of intestinal inflammation as a result of coccidial vaccine challenge could have negatively affected intestinal morphology, leading to a reduction in mucus secretion and mucus coverage of the wall of the intestine. Second, requirements for AA for immune functions might have resulted in increased demand for AA from ingested feed. Additionally, inflammation in the gut may result in a decrease in transit time (increased passage rate) of digesta, hence less time for digesta to be diluted by endogenous secretion
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