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Full-Text Articles in Large or Food Animal and Equine Medicine

The Effects Of Lactation And Negative Energy Balance On Kisspeptin-Stimulated Luteinizing Hormone And Growth Hormone In Dairy Cows, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Herris S. Maxwell, Barbara P. Steele, James L. Sartin Nov 2008

The Effects Of Lactation And Negative Energy Balance On Kisspeptin-Stimulated Luteinizing Hormone And Growth Hormone In Dairy Cows, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Herris S. Maxwell, Barbara P. Steele, James L. Sartin

Animal Science Publications and Other Works

Kisspeptin, a neuroendocrine regulator of gonadotropin releasing hormone, is hypothesized to integrate nutrition and hormones critical to metabolism and the regulation of reproduction. Since the negative energy balance of early lactation is associated with reduced fertility via suppression of gonadotropin secretion and enhanced growth hormone (GH) responsiveness, this experiment was designed to determine the effects of stage of lactation and negative energy balance on kisspeptin-10 (Kp-10) stimulated luteinizing hormone (LH) and GH concentrations. Five nonlactating [5.1 ± 0.8 (SEM) years; 577 ± 19 kg body weight (BW)] and five lactating [4.1 ± 0.6 years; 608 ± 11 kg BW] multiparous …


The Effects Of Lactation And Negative Energy Balance On Kisspeptin-Stimulated Luteinizing Hormone And Growth Hormone In Dairy Cows, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Herris S. Maxwell, Barbara P. Steele, James L. Sartin Nov 2008

The Effects Of Lactation And Negative Energy Balance On Kisspeptin-Stimulated Luteinizing Hormone And Growth Hormone In Dairy Cows, Brian K. Whitlock, Joseph A. Daniel, Robyn R. Wilborn, Herris S. Maxwell, Barbara P. Steele, James L. Sartin

Brian K Whitlock, PhD, DVM, DACT

Kisspeptin, a neuroendocrine regulator of gonadotropin releasing hormone, is hypothesized to integrate nutrition and hormones critical to metabolism and the regulation of reproduction. Since the negative energy balance of early lactation is associated with reduced fertility via suppression of gonadotropin secretion and enhanced growth hormone (GH) responsiveness, this experiment was designed to determine the effects of stage of lactation and negative energy balance on kisspeptin-10 (Kp-10) stimulated luteinizing hormone (LH) and GH concentrations. Five nonlactating [5.1 ± 0.8 (SEM) years; 577 ± 19 kg body weight (BW)] and five lactating [4.1 ± 0.6 years; 608 ± 11 kg BW] multiparous …


Got Controversy - Milk Does, Margaret Sova Mccabe Oct 2008

Got Controversy - Milk Does, Margaret Sova Mccabe

Law Faculty Scholarship

This article analyzes ongoing controversy over how to best label rBST-free milk. Recombinant bovine somatotropin is a genetically engineered drug administered by some farmers to their dairy herds to increase milk production. FDA first approved its use in 1994, despite great controversy. The FDA also issued labeling guidelines that allowed voluntary disclosure of rBST-free milk, so long as it carried the disclaimer that no difference could be detected between milk produced with rBST and rBST-free. The controversy continues today as consumers express a preference for rBST-free milk and many rBST-free producers label their milk this way. "Conventional" milk (with rBST) …


Determinación De Resistencia Antihelmíntica Frente A Las Lactonas Macrocíclicas Por Parte De Nemátodos Gastrointestinales Del Equino Mediante El Test De Reducción De La Oviposición Fecrt En Los Municipios De Aguazul, El Yopal, Maní Y Paz De Ariporo Departamento Del Casanare, Erik Chaparro Salamanca Jan 2008

Determinación De Resistencia Antihelmíntica Frente A Las Lactonas Macrocíclicas Por Parte De Nemátodos Gastrointestinales Del Equino Mediante El Test De Reducción De La Oviposición Fecrt En Los Municipios De Aguazul, El Yopal, Maní Y Paz De Ariporo Departamento Del Casanare, Erik Chaparro Salamanca

Medicina Veterinaria

La presente investigación se llevó a cabo en los municipios de Aguazul, El Yopal, Maní y Paz de Ariporo, departamento del Casanare; el objetivo principal fue determinar los grados de resistencia o susceptibilidad antihelmíntica de parásitos gastrointestinales del equino, frente a las lactonas Macrocíclicas (Ivermectina) para lo cual se muestrearon 40 equinos (10 equinos por municipio), criollos dedicados a la reproducción en estado silvestre. A todos los animales se les tomó una muestra de materia fecal el día cero (antes del tratamiento con Ivermectina) y el día 14 (post tratamiento con Ivermectina) (Ivermectina comercial no genérico), estas muestras se procesaron …