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Browsing University of Hertfordshire by Author "Scott, I."
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Changes in the zymogenic cell populations of the abomasa of sheep infected with Haemonchus contortus
Scott, I.; Stear, M.J.; Irvine, J.; Dick, A.; Wallace, D.S.; McKellar, Quintin (1998-06)The effects of dietary urea supplementation and of a 10-week trickle infection regime, simulating chronic exposure to Haemonchus contortus, on the zymogenic population of the abomasa of Hampshire Down lambs was examined, ... -
Comparison of four methods for the determination of plasma pepsinogen concentration
Scott, I.; Stear, M.J.; McKellar, Quintin (1995-11)Four methods for estimating plasma pepsinogen concentrations were compared to determine the most suitable for routine use. Three of the methods were colorimetric assays which used glycine-buffered albumin, albumin, or ... -
The distribution of pepsinogen within the abomasa of cattle and sheep infected with Ostertagia spp. and sheep infected with Haemonchus contortus
Scott, I.; Dick, A.; Irvine, J.; Stear, M.J.; McKellar, Quintin (1999-03-31)The effect of nematode infections on the production of pepsinogen by ruminants was investigated immunohistochemically and biochemically. Abomasal tissues were collected from parasite-naive cattle and sheep, from sheep ... -
The effects of excretions/secretions of Ostertagia circumcincta on ovine abomasal tissues in vitro
Scott, I.; McKellar, Quintin (1998-03)Products excreted/secreted by Ostertagia circumcincta stimulated the in vitro release of pepsinogen from intact abomasal mucosal sheets and caused the contraction of strips of abomasal smooth muscle, also in vitro. However, ... -
The relationship between the number and size of nematodes in the abomasum and the concentration of pepsinogen in ovine plasma
Stear, M.J.; Bairden, K.; McKellar, Quintin; Scott, I.; Strain, S.; Bishop, S.C. (1999-08)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 ...