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    Peripheral and gastrointestinal immune systems of healthy cattle raised outdoors at pasture or indoors on a concentrate-based ration

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    Author
    Lejeune, Alexandre
    Monahan, Frank J
    Moloney, Aidan P
    Earley, Bernadette
    Black, Alistair D
    Campion, Deirdre P
    Englishby, Tanya
    Reilly, Petrina
    O'Doherty, John V.
    Sweeney, Torres
    Keyword
    Cattle production systems
    Peripheral immune parameters
    Date
    2010-03-31
    
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    URI
    http://hdl.handle.net/11019/256
    Citation
    Alexandre Lejeune, Frank J Monahan, Aidan P Moloney, et al. Peripheral and gastrointestinal immune systems of healthy cattle raised outdoors at pasture or indoors on a concentrate-based ration. BMC Veterinary Research. 2010 Mar 31;6(1):19. DOI: http://dx.doi.org/10.1186/1746-6148-6-19
    Abstract
    Background: Despite an increasing preference of consumers for beef produced from more extensive pasture-based production systems and potential human health benefits from the consumption of such beef, data regarding the health status of animals raised on pasture are limited. The objective of this study was to characterise specific aspects of the bovine peripheral and the gastrointestinal muscosal immune systems of cattle raised on an outdoor pasture system in comparison to animals raised on a conventional intensive indoor concentrate-based system. Results: A number of in vitro functional tests of immune cells suggested subtle differences between the animals on the outdoor versus indoor production systems. There was a decrease in the number of neutrophils and monocytes engaged in phagocytosis in outdoor cattle (P < 0.01 and P < 0.05, respectively) in comparison to those indoors. Following mitogen stimulation, a lower level of interferon-γ was produced in leukocytes from the outdoor animals (P < 0.05). There was evidence of a gastrointestinal nematode infection in the outdoor animals with elevated levels of serum pepsinogen (P < 0.001), a higher number of eosinophils (P < 0.05) and a higher level of interleukin-4 and stem cell factor mRNA expression (P < 0.05) in the outdoor animals in comparison to the indoor animals. Lower levels of copper and iodine were measured in the outdoor animals in comparison to indoor animals (P < 0.001). Conclusion: Despite distinctly contrasting production systems, only subtle differences were identified in the peripheral immune parameters measured between cattle raised at pasture in comparison to animals raised on a conventional intensive indoor concentrate-based production system.
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.1186/1746-6148-6-19
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    Teagasc publications in Biomed Central
    Animal & Bioscience

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