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Full-Text Articles in Medicine and Health Sciences

Improved Feed Protein Fractionation Schemes For Formulating Rations With The Cornell Net Carbohydrate And Protein System, Cristina Lanzas, G A. Broderick, D G. Fox Dec 2008

Improved Feed Protein Fractionation Schemes For Formulating Rations With The Cornell Net Carbohydrate And Protein System, Cristina Lanzas, G A. Broderick, D G. Fox

Cristina Lanzas

Adequate predictions of rumen-degradable protein (RDP) and rumen-undegradable protein (RUP) supplies are necessary to optimize performance while minimizing losses of excess nitrogen (N). The objectives of this study were to evaluate the original Cornell Net Carbohydrate Protein System (CNCPS) protein fractionation scheme and to develop and evaluate alternatives designed to improve its adequacy in predicting RDP and RUP. The CNCPS version 5 fractionates CP into 5 fractions based on solubility in protein precipitant agents, buffers, and detergent solutions: A represents the soluble nonprotein N, B1 is the soluble true protein, B2 represents protein with intermediate rates of degradation, B3 is …


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 …


The Effect Of Heterogeneous Infectious Period And Contagiousness On The Dynamics Of Salmonella Transmission In Dairy Cattle, Cristina Lanzas, S Brien, R Ivanek, Y Lo, P P. Chapagain, K A. Ray, P Ayscue, L D. Warnick, Y T. Grohn Nov 2008

The Effect Of Heterogeneous Infectious Period And Contagiousness On The Dynamics Of Salmonella Transmission In Dairy Cattle, Cristina Lanzas, S Brien, R Ivanek, Y Lo, P P. Chapagain, K A. Ray, P Ayscue, L D. Warnick, Y T. Grohn

Cristina Lanzas

The objective of this study was to address the impact of heterogeneity of infectious period and contagiousness on Salmonella transmission dynamics in dairy cattle populations. We developed three deterministic SIR-type models with two basic infected stages (clinically and subclinically infected). In addition, model 2 included long-term shedders, which were defined as individuals with low contagiousness but long infectious period, and model 3 included super-shedders (individuals with high contagiousness and long infectious period). The simulated dynamics, basic reproduction number (R0) and critical vaccination threshold were studied. Clinically infected individuals were the main force of infection transmission for models 1 and 2. …


The Risk And Control Of Salmonella Outbreaks In Calf-Raising Operations: A Mathematical Modeling Approach, Cristina Lanzas, L D. Warnick, R Ivanek, P Ayscue, D V. Nydam, Y T. Grohn Nov 2008

The Risk And Control Of Salmonella Outbreaks In Calf-Raising Operations: A Mathematical Modeling Approach, Cristina Lanzas, L D. Warnick, R Ivanek, P Ayscue, D V. Nydam, Y T. Grohn

Cristina Lanzas

Salmonellosis in calves has economic and welfare implications, and serves as a potential source of human infections. Our objectives were to assess the risk of Salmonella spread following its introduction into a herd of pre-weaned calves and to evaluate the efficacy of control strategies to prevent and control outbreaks. To meet these objectives, we developed a model of Salmonella transmission within a pre-weaned group of calves based on a well documented outbreak of salmonellosis in a calf-raising operation and other literature. Intervention scenarios were evaluated in both deterministic and stochastic versions of the model. While the basic reproduction number (R0) …


Global Food Systems And Public Health : Production Methods And Animal Husbandry, A National Commission On Industrial Farm Animal Production Report. Pew Commission On Industrial Farm Animal Production, M Salman, John C. New Jr., M Bailey, Corrie Brown, L Detwiler, D Galligan, C Hall, Melissa Kennedy, G Lonergan, L Mann, D Renter, M Saeed, B White, S Zika May 2008

Global Food Systems And Public Health : Production Methods And Animal Husbandry, A National Commission On Industrial Farm Animal Production Report. Pew Commission On Industrial Farm Animal Production, M Salman, John C. New Jr., M Bailey, Corrie Brown, L Detwiler, D Galligan, C Hall, Melissa Kennedy, G Lonergan, L Mann, D Renter, M Saeed, B White, S Zika

John C. New Jr., DVM, MPH, DACVPM

No abstract provided.


Microarray Analysis Demonstrates A Role For Slug In Epidermal Homeostatsis, Kim M. Newkirk Jan 2008

Microarray Analysis Demonstrates A Role For Slug In Epidermal Homeostatsis, Kim M. Newkirk

Kim M Newkirk

No abstract provided.


The Acute Cutaneous Inflammatory Response Is Attenuated In Slug Knockout Mice. Newkirk K, Duncan F, Brannick E, Chandler H, Parent A, Kusewitt D., Kim M. Newkirk Jan 2008

The Acute Cutaneous Inflammatory Response Is Attenuated In Slug Knockout Mice. Newkirk K, Duncan F, Brannick E, Chandler H, Parent A, Kusewitt D., Kim M. Newkirk

Kim M Newkirk

No abstract provided.


Lessons Learned: Acting As Guardian/Special Master In The Bad Newz Kennels Case, Rebecca J. Huss Jan 2008

Lessons Learned: Acting As Guardian/Special Master In The Bad Newz Kennels Case, Rebecca J. Huss

Rebecca J. Huss

The United States District Court for the Eastern District of Virginia appointed Rebecca Huss as the guardian/special master of the pit bulls that were the subject of the case against Michael Vick relating to dog fighting. In April of 2007, the Surry County Sheriff's Department seized fifty-three pit bulls from Vick's home in Virginia. According to the facts set forth in the plea agreement, dogs on the property were killed and subjected to violent dog fights. Similar to human victims of abuse, the dogs needed someone to represent their best interests during litigation. Huss was in charge of determining whether …