Fecal and liver abscess microbiota of feedlot steers managed in natural and conventional programs, The
The fecal and liver abscess microbiota of steers managed in a single commercial feedlot in natural and conventional programs were evaluated. Steers managed in the conventional program (n = 7 pens) were administered hormonal implants, tylosin, monensin, and ractopamine; steers managed in the natural program (n = 7 pens) were raised without growth-promoting technologies or antimicrobials. The objective of the first study was to characterize the longitudinal changes in the fecal microbiota and to evaluate differences between management programs after placement (T1), after transition to the finishing ...
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