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	Provedor de dados AgEcon (1) Electron. J. Biotechnol. (1) Autor Brooks, Kathleen R. (1) Busse,Nadine (1) Czermak,Peter (1) Holland, Ben P. (1) Krehbiel, Clint (1) Oppermann,Tobias (1) Raper, Kellie Curry (1) Schwarz,Stefan (1) Ward, Clement E. (1) Mais... Palavra-chave Bovine respiratory disease (2) ATP assay (1) Bacterial pathogen (1) Cattle industry (1) Critical parameters (1) Haptoglobin (1) Lipopolysaccharides (1) Livestock Production/Industries (1) Mannheimia haemolytica (1) Microbial biotechnology (1) Net returns (1) Polymyxin B (1) Production Economics (1) Quantification (1) Virulence (1) Mais... Tipo do documento Conference Paper or Presentation (1) Journal article (1) Ano 2016 (1) 2008 (1) País Chile (1) United States (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A fast and simple assay to quantify bacterial leukotoxin activity Electron. J. Biotechnol. Oppermann,Tobias; Schwarz,Stefan; Busse,Nadine; Czermak,Peter. Background: Mannheimia haemolytica is the primary bacterial pathogen in causing bovine respiratory disease with tremendous annual losses in the cattle industry. The leukotoxin from M. haemolytica is the predominant virulence factor. Several leukotoxin activity assays are available but not standardized regarding sample preparation and cell line. Furthermore, these assays suffer from a high standard error, a prolonged time consumption and often complex sample pretreatments, which is important from the bioprocess engineering point of view. Results: Within this study, an activity assay based on the continuous cell line BL3.1 combined with a commercial available adenosine triphosphate viability assay kit was established. The leukotoxin activity was found to be... Tipo: Journal article Palavras-chave: ATP assay; Bacterial pathogen; Bovine respiratory disease; Cattle industry; Critical parameters; Lipopolysaccharides; Mannheimia haemolytica; Microbial biotechnology; Polymyxin B; Quantification; Virulence. Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000600006 Economic Effects of Bovine Respiratory Disease on Feedlot Cattle during Backgrounding and Finishing Phases AgEcon Brooks, Kathleen R.; Raper, Kellie Curry; Ward, Clement E.; Holland, Ben P.; Krehbiel, Clint. This research examines the economic effects of bovine respiratory disease (BRD) on backgrounding and finishing phases of cattle production. This research measures the effectiveness of using serum haptoglobin (Hp) concentration to predict BRD occurrence and the impact of multiple treatments for BRD infection on cattle performance and returns. During the backgrounding phase, 222 heifers were grouped by Hp level. After the backgrounding phase, 193 heifers were then grouped by number of BRD treatments in the finishing phase. Net returns decreased in the backgrounding phase and the combined phases as the number of BRD treatments increased. Hp concentrations had no significant effects on net returns. Tipo: Conference Paper or Presentation Palavras-chave: Bovine respiratory disease; Haptoglobin; Net returns; Livestock Production/Industries; Production Economics. Ano: 2008 URL: http://purl.umn.edu/45849 Registros recuperados: 2 Primeira ... 1 ... Última

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