| Feeding heat-treated colostrum or unheated colostrum with two different bacterial concentrations to neonatal dairy calves. | |
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MedLine Citation:
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PMID: 19700719 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of this study was to determine the effects of feeding heat-treated colostrum or unheated colostrum of different bacterial counts on passive transfer of immunity in neonatal dairy calves. First milking colostrum was collected from Holstein cows, frozen at -20 degrees C, and then thawed and pooled into a single batch. One-third of the pooled colostrum was transferred into plastic containers and frozen at -20 degrees C until needed for feeding (unheated-low bacteria). Another third was heat-treated at 60 degrees C for 30 min and then frozen at -20 degrees C until needed for feeding (heat-treated). The final third of colostrum was transferred into plastic containers, stored at 20 degrees C for bacteria to grow for 24 h (unheated-high bacteria), and then frozen at -20 degrees C until needed for feeding. A total of 30 Holstein bull calves weighing >or=30 kg at birth were systematically enrolled into 1 of the 3 treatment groups. Calves were separated from their dams at birth before suckling occurred. Before colostrum was fed, a jugular blood sample was collected from each calf. The first feeding consisted of 3.8 L of colostrum containing, on average, 68 g of IgG/L using an esophageal feeder between 1.5 and 2 h after birth. For the second and third feeding pasteurized whole milk at 5% of birth weight was fed. Blood samples were collected before colostrum feeding and at 24 and 48 h of age to determine serum total protein (STP) and IgG concentrations. Heat treatment of colostrum at 60 degrees C for 30 min reduced colostrum bacteria concentration yet maintained colostral IgG concentration and viscosity at similar levels to the control treatment. Calves fed heat-treated colostrum had significantly greater STP and IgG concentrations at 24 h and greater apparent efficiency of absorption (AEA) of IgG (STP = 62.5 g/L; IgG = 26.7 g/L; AEA = 43.9%) compared with calves fed unheated-low bacteria colostrum (STP = 57.0 g/L; IgG = 20.2 g/L; AEA = 35.4%) or unheated-high bacteria colostrum (STP = 56.2 g/L; IgG = 20.1 g/L; AEA = 32.4%). High bacteria load in colostrum did not interfere with total protein or IgG absorption or AEA. |
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Authors:
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J A Elizondo-Salazar; A J Heinrichs |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of dairy science Volume: 92 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2009 Sep |
Date Detail:
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Created Date: 2009-08-24 Completed Date: 2009-11-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 4565-71 Citation Subset: IM |
Affiliation:
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Department of Dairy and Animal Science, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Newborn Bacterial Physiological Phenomena* / immunology Cattle / immunology* Colony Count, Microbial Colostrum / chemistry, immunology, microbiology* Hot Temperature Immunity, Maternally-Acquired* Immunoglobulin G / analysis, blood Male Regression Analysis |
| Chemical | |
Reg. No./Substance:
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0/Immunoglobulin G |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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