نتایج جستجو برای: weaned calves

تعداد نتایج: 16912  

Journal: :Journal of dairy science 2008
J R Stabel

In the present study, the potential benefits of feeding pasteurized colostrum were demonstrated in calves born to dams naturally infected with Mycobacterium avium ssp. paratuberculosis. Calves were separated at birth from their dams and randomly allocated into a group fed either the colostrum of their dam (DC; n = 6), followed by feeding the milk of the dam for 3 wk and then milk replacer, or i...

2002
Terry Klopfenstein D. J. Jordon

Introduction Although some summer and fall calving occurs, most calves in the northern states are born in the spring. Therefore, to have a consistent supply of feeders entering feedlots, a variety of stocker programs are used. About 30% of calves produced in the U. S. enter the feedlot as calf-feds. Some of these calf-feds are weaned and enter the feedlot 30 to 40 days later. It is also common ...

Journal: :Veterinary parasitology 2004
James M Trout Mónica Santín Ellis Greiner Ronald Fayer

To determine the prevalence of Giardia genotypes in pre-weaned dairy calves, fecal samples were collected from a minimum of 18, 1-7-week-old dairy calves per farm on two farms each in the states of Vermont, New York, Pennsylvania, Maryland, Virginia, North Carolina, and Florida. Samples cleaned of fecal debris and concentrated using CsCl density gradient centrifugation were stained and examined...

2014
Rolnei R. Daros João H. C. Costa Marina A. G. von Keyserlingk Maria J. Hötzel Daniel M. Weary

Negative emotional states in humans are associated with a negative (pessimistic) response bias towards ambiguous cues in judgement tasks. Every mammalian young is eventually weaned; this period of increasing nutritional and social independence from the dam is associated with a pronounced behavioural response, especially when weaning is abrupt as commonly occurs in farm animals. The aim of the c...

2002
J. W. Holloway B. G. Warrington D. W. Forrest R. D. Randel

The objective of this study was to determine the growth patterns and performance ofFI Brahman (Bos indicus)-, Senepol (Bos taurus)-, and Tuli (Sanga)-Angus calves under semiarid south Texas conditions. Four hundred eighty-nine preweaning records collected over 4 yr were analyzed. The statistical model for performance traits included the effects of breed of sire, year, sex, age of dam, and breed...

2013
P. Pithua

The association between serum IgG concentration and preweaning health performance in Holstein calves were evaluated in a prospective cohort study design framework. Post colostral blood samples were collected from 561 calves and serum IgG concentrations were quantitated using a single radial immunodiffusion assay. Preweaning treatments for diarrhea, pneumonia, omphalitis and frequency of antibio...

2011
Jong Hyeong Kim Lovelia L. Mamuad Hyun June Lee Kwang Seok Ki Wang Shik Lee Jong K. Ha Sang Suk Lee

The objective of this experiment was to evaluate the effect of dietary supplementation of glutathione (GSH) on health, solid feed consumption, nutrient intake, body weight gain (BWG), feed efficiency, blood metabolites and the occurrence of diarrhea in Holstein neonatal calves. The calves were fed plain milk as a control (CON) or milk with GSH supplementation. Sixteen calves were separated from...

Journal: :Journal of the American Veterinary Medical Association 2007
Jason B Osterstock Geoffrey T Fosgate Bo Norby Elizabeth J B Manning Michael T Collins Allen J Roussel

OBJECTIVE To evaluate the effect of exposure to environmental mycobacteria on results of 2 commercial ELISAs for paratuberculosis in cattle. DESIGN Experimental trial. ANIMALS 19 weaned crossbred beef calves. PROCEDURES Calves were inoculated SC with 1 of 5 mycobacterial isolates (3 calves/isolate) derived from herds with high proportions of false-positive serologic reactions for paratube...

2010
Rongjun Wang Helei Wang Yanru Sun Longxian Zhang Fuchun Jian Changshen Ning Lihua Xiao

24 25 To estimate the prevalence and public health significance of cryptosporidiosis in 26 pre-weaned calves in China, 801 fecal samples from eight farms in seven areas in 27 Henan Province were examined for Cryptosporidium oocysts. The overall infection 28 rate of Cryptosporidium was 21.5%, with the farm in Xinxiang having the highest 29 prevalence (40%). No significant difference in infection...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید