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Strong Concordance Between Transcriptomic Patterns Of Spleen And Peripheral Blood Leukocytes In Response To Avian Pathogenic Escherichia Coli Infection, Erin E. Sandford, Megan Orr, Xianyao Li, Huaijun Zhou, Timothy J. Johnson, Subhashinie Kariyawasam, Peng Liu, Lisa K. Nolan, Susan J. Lamont Dec 2012

Strong Concordance Between Transcriptomic Patterns Of Spleen And Peripheral Blood Leukocytes In Response To Avian Pathogenic Escherichia Coli Infection, Erin E. Sandford, Megan Orr, Xianyao Li, Huaijun Zhou, Timothy J. Johnson, Subhashinie Kariyawasam, Peng Liu, Lisa K. Nolan, Susan J. Lamont

Veterinary Microbiology and Preventive Medicine Publications

Avian pathogenic Escherichia coli (APEC) causes morbidity in chickens and exhibits zoonotic potential. Understanding host transcriptional responses to infection aids the understanding of protective mechanisms and serves to inform future colibacillosis control strategies. Transcriptomes of spleen and peripheral blood leukocytes (PBLs) of the same individual birds in response to APEC infection were compared to identify common response patterns and connecting pathways. More than 100 genes in three contrasts examining pathology and infection status were significantly differentially expressed in both tissues and similarly regulated. Tissue-specific differences in catalytic activity, however, appear between birds with mild and severe pathology responses. Early expression ...


Energy Use In Pig Production: An Examination Of Current Iowa Systems, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman Mar 2012

Energy Use In Pig Production: An Examination Of Current Iowa Systems, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman

Agricultural and Biosystems Engineering Publications

This paper compares energy use for different pig production systems in Iowa, a leader in US swine production. Pig production systems include not only the growth and performance of the pigs, but also the supporting infrastructure of pig production. This supporting infrastructure includes swine housing, facility management, feedstuff provision, swine diets, and manure management. Six different facility type × diet formulation × cropping sequence scenarios were modeled and compared. The baseline system examined produces 15,600 pigs annually using confinement facilities and a corn-soybean cropping sequence. Diet formulations for the baseline system were corn-soybean meal diets that included the synthetic AA L-lysine ...


Leukocyte Transcriptome From Chickens Infected With Avian Pathogenic Escherichia Coli Identifies Pathways Associated With Resistance, Erin E. Sandford, Megan Orr, Mandy Shelby, Xianyao Li, Huaijun Zhou, Timothy J. Johnson, Subhashinie Kariyawasam, Peng Liu, Lisa K. Nolan, Susan J. Lamont Jan 2012

Leukocyte Transcriptome From Chickens Infected With Avian Pathogenic Escherichia Coli Identifies Pathways Associated With Resistance, Erin E. Sandford, Megan Orr, Mandy Shelby, Xianyao Li, Huaijun Zhou, Timothy J. Johnson, Subhashinie Kariyawasam, Peng Liu, Lisa K. Nolan, Susan J. Lamont

Veterinary Microbiology and Preventive Medicine Publications

Avian pathogenic Escherichia coli (APEC) causes colibacillosis, which is responsible for morbidity and mortality in chickens. Gene expression patterns have previously been demonstrated to differ between chicken populations that are resistant vs. susceptible to bacterial infection, but little is currently known about gene expression response to APEC. Increased understanding of gene expression patterns associated with resistance will facilitate genetic selection to increase resistance to APEC. Male broiler chicks were vaccinated at 2 weeks of age and challenged with APEC at 4 weeks of age. Peripheral blood leukocytes were collected at 1 and 5 day post-infection. Lesions on the liver, pericardium ...


Site Specific Implementation Of Practices That Alter The Spatial/Temporal Distribution Of Grazing Cattle To Improve Water Quality Of Pasture Streams In The Rathbun Lake Watershed, James R. Russell Jan 2012

Site Specific Implementation Of Practices That Alter The Spatial/Temporal Distribution Of Grazing Cattle To Improve Water Quality Of Pasture Streams In The Rathbun Lake Watershed, James R. Russell

Leopold Center Completed Grant Reports

This study examined how pasture size and composition can affect cattle distribution in and around streams, and influence the risk of pollutants stemming from cattle congregating in a small area.


Yields Of Corn, Soybeans, And Alfalfa In Western Iowa: 1990 To 2011, Mark S. Honeyman, Wayne B. Roush Jan 2012

Yields Of Corn, Soybeans, And Alfalfa In Western Iowa: 1990 To 2011, Mark S. Honeyman, Wayne B. Roush

Iowa State Research Farm Progress Reports

The ISU Western Research Farm, Castana, Iowa is one of the oldest in Iowa dating to 1946. It also has a unique location in the loess hills of western Iowa. The research farm was set up to study the deep loess soils, particularly crop production and soil conservation methods. Although the work at the research farm has transitioned away from traditional plot work, yields of major crops grown at the farm, and climate data are collected each year. Crop yields are a reflection of current technologies and weather. In western Iowa, rainfall is especially critical and is often the limiting ...


Whole Genome Analysis Of Pinkeye Scores In Angus Cattle, Kadir Kizilkaya, Richard G. Tait Jr., Dorian J. Garrick, Rohan L. Fernando, James M. Reecy Jan 2012

Whole Genome Analysis Of Pinkeye Scores In Angus Cattle, Kadir Kizilkaya, Richard G. Tait Jr., Dorian J. Garrick, Rohan L. Fernando, James M. Reecy

Iowa State Research Farm Progress Reports

Infectious Bovine Keratoconjunctivitis (IBK), known as pinkeye, is a common infectious disease affecting the eyes of cattle. It is characterized by excessive tearing, inflammation of the conjunctiva, and ulceration of the cornea. Although pinkeye is non-fatal, it has a marked economic impact on the cattle industry, due to the decreased performance of infected individuals. Genetic effects on the susceptibility of IBK have been studied and Hereford, Jersey, and Holstein breeds were found to be more susceptible to IBK than Bos Indicus breeds. The objectives of our study were: 1) to estimate genetic parameters of IBK scored in different categories by ...


Effects Of Bedding On Pig Performance, Mark S. Honeyman, John F. Patience Jan 2012

Effects Of Bedding On Pig Performance, Mark S. Honeyman, John F. Patience

Iowa State Research Farm Progress Reports

More pigs are being produced in bedded systems such as hoop barns due to the increase in demand for niche pork. Most of the current swine nutrition information has been generated in confinement settings without bedding. As omnivores, pigs ingest some bedding. There are questions about the effects of the ingested bedding on growth and feed utilization by the modern market pig. More knowledge in this area will allow for more accurate feed formulation in bedded systems.


The University Compost Facility After Three Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman Jan 2012

The University Compost Facility After Three Years, Steve J. Jonas, Timothy R. Goode, Kapil Arora, Mark S. Honeyman

Iowa State Research Farm Progress Reports

The University Compost Facility, 52274 260th St., Ames, Iowa has completed three full years of operation. The facility is managed by the ISU Research Farms and has a separate revolving account that receives fees and sales, and pays expenses. The facility is designed to be self-supporting, i.e. not receive allocations for its operations. The facility consists of seven, 80 × 140 ft hoop barns and a new 55 × 120 ft hoop barn, all with paved floors. The facility also has a Mettler-Toledo electronic scale with a 10 ft × 70 ft platform to weigh all materials. Key machinery is 1 ...


Converting Land From Poplar Tree Bioenergy Planting To Cropland: An Example, Kent R. Berns, Mark S. Honeyman, Richard B. Hall Jan 2012

Converting Land From Poplar Tree Bioenergy Planting To Cropland: An Example, Kent R. Berns, Mark S. Honeyman, Richard B. Hall

Iowa State Research Farm Progress Reports

Many landowners ask about the process and costs for returning land to crop production after trees are cut for biomass. A field on the Squaw Creek bottom, Story County, Iowa was planted to hybrid poplar trees in spring 2000. The trees were planted in rows with a 10-ft spacing. The trees were cut in spring 2010. The resulting field was four acres, and this is the account of the first corn crop in 2011 on the area.


Developing Berkshire Market Pig Growth Curves, Peter J. Lammers, John W. Mabry, Mark S. Honeyman, P. Matthew Swantek, Wayne B. Roush Jan 2012

Developing Berkshire Market Pig Growth Curves, Peter J. Lammers, John W. Mabry, Mark S. Honeyman, P. Matthew Swantek, Wayne B. Roush

Iowa State Research Farm Progress Reports

Several factors have stimulated interest in an old, rather minor swine breed, Berkshire pigs. Berkshires produce pork that is darker, with more intramuscular fat than most swine breeds and lines currently. As the majority of modern pigs were genetically selected to be leaner, the Berkshire breed has continued to produce more flavorful pork. Asian consumers, especially Japanese, prefer and will pay a premium for Berkshire pork. American chefs and discriminating consumers request Berkshire pork, a strong market demand that has caused a flourish in the pork niche market largely centered around pork from Berkshirebred pigs. Some Iowa pork producers are ...


Characterizing Overall Response To Two-Shot Vaccination For Bvdv Type 2 In Angus Weanling Calves, Richard G. Tait Jr., Erika Diane Downey, Mary Sue Mayes, Julia Ridpath, Dorian J. Garrick, James M. Reecy Jan 2012

Characterizing Overall Response To Two-Shot Vaccination For Bvdv Type 2 In Angus Weanling Calves, Richard G. Tait Jr., Erika Diane Downey, Mary Sue Mayes, Julia Ridpath, Dorian J. Garrick, James M. Reecy

Iowa State Research Farm Progress Reports

Vaccination is a management strategy utilized to help reduce prevalence of bovine respiratory disease in feedlots. However, not all animals respond similarly to vaccinations. It is believed that an animal’s genetics control part of the ability to respond to a vaccination protocol. In order to evaluate the genetic control of a new trait such as response to vaccination, it is important to understand the non-genetic factors that affect an animal’s response to vaccination. The objective of this study was to characterize the non-genetic factors affecting overall response to a two-shot vaccination for bovine viral diarrhea virus type 2 ...