Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- 1.6 BIOLOGICAL SCIENCES (1)
- 3. MEDICAL AND HEALTH SCIENCES (1)
- 3.3 HEALTH SCIENCES (1)
- 3.4 HEALTH BIOTECHNOLOGY (1)
- 4. AGRICULTURAL SCIENCES (1)
-
- 4.2 ANIMAL AND DAIRY SCIENCE (1)
- 4.3 VETERINARY SCIENCE (1)
- 4.4 AGRICULTURAL BIOTECHNOLOGY (1)
- Beef cattle (1)
- Biopharming (1)
- ELISA (1)
- Epidemiology (1)
- Genetic correlations (1)
- Infectious diseases (1)
- Interferon-gamma (1)
- Johne’s disease (1)
- Microbiology (1)
- Purified protein derivative (1)
- Residual energy intake (1)
- Residual gain (1)
- Slaughter traits (1)
- TB test (1)
- Tuberculosis (1)
- Zoology (1)
Articles 1 - 2 of 2
Full-Text Articles in Dairy Science
Feed Efficiency And Carcass Metrics In Growing Cattle, David N. Kelly, Craig Murphy, Roy D. Sleator, Michelle M. Judge, Stephen B. Conroy, Donagh P. Berry
Feed Efficiency And Carcass Metrics In Growing Cattle, David N. Kelly, Craig Murphy, Roy D. Sleator, Michelle M. Judge, Stephen B. Conroy, Donagh P. Berry
Department of Biological Sciences Publications
Some definitions of feed efficiency such as residual energy intake (REI) and residual gain (RG) may not truly reflect production efficiency. The energy sinks used in the derivation of the traits include metabolic live-weight; producers finishing cattle for slaughter are, however, paid on the basis of carcass weight, as opposed to live-weight. The objective of the present study was to explore alternative definitions of REI and RG which are more reflective of production efficiency, and quantify their relationship with performance, ultrasound, and carcass traits across multiple breeds and sexes of cattle. Feed intake and live-weight records were available on 5,172 …
Is Tb Testing Associated With Increased Blood Interferon-Gamma Levels?, Aideen E. Kennedy, Jim O'Mahony, Noel Byrne, John Macsharry, Riona G. Sayers
Is Tb Testing Associated With Increased Blood Interferon-Gamma Levels?, Aideen E. Kennedy, Jim O'Mahony, Noel Byrne, John Macsharry, Riona G. Sayers
Department of Biological Sciences Publications
The Republic of Ireland reports a relatively low prevalence of Johne’s disease (JD) compared to international counterparts. Postulated reasons for this include a lower average herd size and a grass-based production system. Ireland also engages in high levels of bovine tuberculosis (bTB) testing. As interferon-gamma (IFN-γ) is believed to play a key role in protecting against JD, it is our hypothesis that administration of purified protein derivative (PPD), as part of the bTB test, is associated with a systemic increase in IFN-γ production, which may potentially limit clinical progression of the disease. We studied 265 cows (202 Friesian and 63 …