November 13, 2017

New in TAS

New content is available in the Just Published section of Translational Animal Science.

The following articles, all open access, were added to Just Published on November 9, 2017:


EVALUATION OF THE OPTIMAL STANDARDIZED ILEAL DIGESTIBLE TRYPTOPHAN:LYSINE RATIO IN LACTATING SOW DIETS
L. Greiner, C. Neill, G.L. Allee, K. J. Touchette and J. Connor

Three hundred and fifteen primiparous and multiparous sows were evaluated in a study to determine the effect of standardized ileal digestible (SID) Trp:Lys ratio in lactating sow diets. Camborough sows (PIC USA, Hendersonville, TN) ranging from first parity to eighth parity were blocked by parity and randomly allotted to 1 of 4 experimental diets containing different levels of added L-Trp (0.006, 0.026, 0.045, and 0.064%, respectively) while soybean meal, 30% corn dried distiller’s grain with solubles (DDGS), and L-Lys levels were held constant. The SID Lys level for the rations was 0.95% so that the SID Trp:Lys ratios were formulated to be 14, 16, 18, and 20%, respectively. All diets were formulated to have 3.2 Mcal ME/kg and to contain vitamins and minerals that exceeded NRC (1998) recommendations.
 

NATIONAL BEEF QUALITY AUDIT–2016: TRANSPORTATION, MOBILITY, LIVE CATTLE, AND CARCASS ASSESSMENTS OF TARGETED PRODUCER-RELATED CHARACTERISTICS THAT AFFECT VALUE OF MARKET COWS AND BULLS, THEIR CARCASSES, AND ASSOCIATED BY-PRODUCTS
M. K. Harris, L. C. Eastwood, C. A. Boykin, A. N. Arnold, K. B. Gehring, D. S. Hale, C. R. Kerth, D. B. Griffin, J. W. Savell, K. E. Belk, D. R. Woerner, J. D. Hasty, R. J. Delmore Jr., J. N. Martin, T. E. Lawrence, T. J. McEvers, D. L. VanOverbeke, G. G. Mafi, M. M. Pfeiffer, T. B. Schmidt, R. J. Maddock, D. D. Johnson, C. C. Carr, J. M. Scheffler, T. D. Pringle and A. M. Stelzleni

The National Beef Quality Audit–2016 marks the fourth iteration in a series assessing the quality of live beef and dairy cows and bulls and their carcass counterparts. The objective was to determine the incidence of producer-related defects, and report cattle and carcass traits associated with producer management. Conducted from March through December of 2016, trailers (n = 154), live animals (n = 5,470), hide-on carcasses (n = 5,278), and hide-off hot carcasses (n = 5,510) were surveyed in 18 commercial packing facilities throughout the United States. Cattle were allowed 2.3 m2 of trailer space on average during transit indicating some haulers are adhering to industry handling guidelines for trailer space requirements.
 

RESPONSES OF PREGNANT EWES AND YOUNG LAMBS TO OVALBUMIN IMMUNIZATION, ANTIOVALBUMIN ANTIBODY TRANSFER TO LAMBS, AND TEMPORAL CHANGES IN ANTIOVALBUMIN ANTIBODY
G. S. Lewis, S. Wang and J. B. Taylor

Factors affecting the decay of maternally derived IgG and ability of neonatal lambs to produce protective amounts of their own IgG are not well understood. Thus, we conducted 3 experiments to quantify the 1) response of pregnant ewes to ovalbumin immunization, 2) antiovalbumin antibody (OV-IgG) transfer to lambs, 3) changes over time in OV-IgG in lambs, and 4) response of young lambs to ovalbumin immunization. In Exp. 1, ewes (n = 10/group) either received control (adjuvant + saline) or ovalbumin (ovalbumin + adjuvant + saline) injections at ≈ 42 and 14 d prepartum.
 

ECONOMIC IMPACTS OF LAMENESS IN FEEDLOT CATTLE
J. Davis-Unger, E. A. Pajor, K. Schwartzkopf-Genswein, S. Marti, C. Dorin, E. Spackman and K. Orsel

Lameness is an important health issue in feedlot cattle; however, there is a paucity of information regarding its economic impact. Decision tree models are excellent tools for assessing costs of disease such as the net return (net return = benefit – cost). Models were developed using expert opinion, literature and retrospective feedlot data provided by Vet-Agri Health Services (VAHS, Airdrie, Alberta, Canada) collected from 2005 to 2015 on individually treated cattle (n = 30,940) from 28 feedlots. The objective was to estimate net return of various lameness diagnoses and impacts of cattle type, season of treatment, and extreme high and low cattle prices.

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