J. D. Richards

TL;DR: The biological basis for antibiotic effects on animal growth efficiency will consider effects on intestinal microbiota and effects on the host animal and will use the germ-free animal to illustrate effects of the conventional microflora.

TL;DR: For example, this paper showed that there is no difference in the bioavailability of chelated trace minerals versus inorganic trace minerals (ITM) when compared on the linear portion of the dose-response curve.

TL;DR: The results from the present study suggest that serum endotoxin and AGP, as well as, gene expression of FABP2, FABp6, IL-8, Il-1β, TGF-β4, occludin, and MUC2 in mucosa may work as potential biomarkers for gut barrier health in chickens.

TL;DR: Chelated trace minerals are effective alternative trace mineral sources for satisfying the trace mineral needs of rapidly growing broilers and allowing for a reduction in dietary mineral supplementation, thereby potentially reducing the excretion of minerals into the environment as discussed by the authors.

TL;DR: In this paper, two 54-d grow-out trials were conducted in a commercial broiler facility to determine the effect on performance, carcass yield, footpad lesions, and litter trace mineral concentrations when feeding broiler chicks diets containing reduced levels of chelated Zn-(HMTBA)2 [where HMTBA is 2-hydroxy-4-(methylthio)butanoic acid; trials 1 and 2], Cu-(ZnSO4)2 (trial 2), and Mn-(MTCA)2(trial 2) in comparison with industry