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        The relationship between the number and size of nematodes in the abomasum and the concentration of pepsinogen in ovine plasma

        Author
        Stear, M.J.
        Bairden, K.
        McKellar, Quintin
        Scott, I.
        Strain, S.
        Bishop, S.C.
        Attention
        2299/11407
        Abstract
        Six-month-old lambs that had been naturally infected with predominantlyTeladorsagia (Ostertagia) circumcinctawere tested for plasma pepsinogen concentrations because pepsinogen concentrations may reflect the extent of damage to the abomasum. The distribution of pepsinogen concentrations among these lambs was positively skewed with most individuals having relatively low concentrations. Pepsinogen concentrations were more strongly associated with variation in the mean length of the adult female worms than with variation in the number of nematodes present. Previous trials have suggested that genetic variation in the growth of lambs is strongly influenced by genetic variation in worm length. Together these results imply that variation among lambs in the pathogenic effects ofT. circumcinctadepends upon the mean size of the worms as well as the number of worms present.
        Publication date
        1999-08
        Published in
        Research in Veterinary Science
        Published version
        https://doi.org/10.1053/rvsc.1998.0301
        Other links
        http://hdl.handle.net/2299/11407
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