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The Effects Of Classic And Variant Infectious Bursal Disease Viruses On Lymphocyte Populations In Specific-Pathogen-Free White Leghorn Chickens, Christina L. Johnson, Ashley K. Cox, April D. Keeter, Will J. Quinn, Gisela F. Erf, Lisa A. Newberry
The Effects Of Classic And Variant Infectious Bursal Disease Viruses On Lymphocyte Populations In Specific-Pathogen-Free White Leghorn Chickens, Christina L. Johnson, Ashley K. Cox, April D. Keeter, Will J. Quinn, Gisela F. Erf, Lisa A. Newberry
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Infectious bursal disease virus (IBDV) is a pathogen that primarily infects B lymphocytes in domestic avian species. This viral infection has been associated with immunosuppression, clinical disease/mortality, and enteric malabsorption effects. The purpose of this experiment was to compare the effects of a classic (USDA-STC) and a new variant IBDV (RB-4, known to induce primarily the enteric disease) on immune cell populations in lymphoid organs. Seventeen-dayold specific-pathogen-free (SPF) White Leghorn chickens were either not infected (control) or inoculated with either USDA-STC or RB-4 IBD viral isolate. On days 3 and 5 post-inoculation (PI), lymphoid tissues were collected to prepare cell …
Phase-Feeding Affects Crude Protein Intake, Excretion, And Retention Of Broilers From 21 To 63 Days, Niki Loupe, Trey Pope, Padmakumar Pillai, Jason Emmert
Phase-Feeding Affects Crude Protein Intake, Excretion, And Retention Of Broilers From 21 To 63 Days, Niki Loupe, Trey Pope, Padmakumar Pillai, Jason Emmert
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
An experiment was conducted to assess effects of phase-feeding (PF) on crude protein (CP) intake, excretion, and retention of broilers. Six birds were housed individually and were fed diets formulated using recommendations from National Research Council (NRC) or linear regression equations. Two PF treatments were prepared: standard (PF) and low (PF10), in which predicted lysine, sulfur amino acids, and threonine recommendations were reduced by 10%. For PF and PF10, two diets (high-nutrient and low-nutrient density) were blended in variable quantities to produce rations matching predicted amino acid requirements over two intervals. Birds were fed a single NRC grower and finisher …
Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles—E,E+, And Erh, Rupali Ugrankar, Kim Cheng, Ronald Okimoto
Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles—E,E+, And Erh, Rupali Ugrankar, Kim Cheng, Ronald Okimoto
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The melanocortin 1-receptor (MC1-R) gene plays a key role in the expression of fur and feather color in mammals and birds by regulating the distribution of two melanin pigments: eumelanin (black/brown) and pheomelanin (red/yellow). MC1-R corresponds to the classical Extension (E) locus in mice, pigs, dogs, horses, and chickens. Three E locus alleles, the wild-type (e+), brown (E), and redhead (erh) have been identified in Japanese quail (Coturnix japonica). To determine if the quail E locus phenotypes were due to variation in the MC1-R gene, the coding region of the MC1-R gene was PCR amplified and DNA sequenced using genomic …