The measurement of serum haemoglobin reactive protein in selected groups of cattle and its use in clinical practice

Abstract

The presence of serum haemoglobin reactive protein (HRP) as an indicator of infection has been suggested. The serum HRP levels in varying groups of cattle were measured. A reference range, established on 233 cattle, of 0–10?mol/1 (as methaemoglobin binding capacity) was used. Forty eight of 104 cows that had recently aborted had raised serum HRP levels. Of 37 cows that had recently aborted, 26 had a leucocyte picture typical of bacterial infection and 18 of these had raised serum HRP levels. Eleven cows with a normal leucocyte picture had normal serum HRP levels. Seventeen cattle, with clinical infection and leucocyte pictures typical of bacterial infection, all had raised HRP levels. Of 133 cattle in which infection was considered a possibility by the attending veterinarian, 53 had an abnormal leucocyte picture with a raised serum HRP level. The mechanisms of a raised serum HRP level are unknown but, at the clinical level, its association with pyogenic infection make it a useful test in the confirmation of pyogenic infection.     

The effects of "holding" on some blood parameters in goats

One young male and five female goats aged from four months to mature full-mouthed were handled by stroking and raising the jugular vein intermittently for one minute each day for four days. A control group was kept in a similar pen out of sight of the test group for the four days and approached only when attended for pen cleaning and feeding. On the fifth day, heparinised blood samples were taken once hourly for a period of three hours by jugular venepuncture from both groups. After processing, the samples were examined for packed cell volumes, plasma and erythrocyte potassium and sodium concentrations. Analysis of variance of the data showed a significant (P less than 0.01) reduction in erythrocyte potassium concentration in the unhandled group (76.3 mmol/l to 74.2 mmol/l) from Time 0 to Time 1, and a similarly significant increase in levels in the handled group (73.7 mmol/l to 78.0 mmol/l) from Time 0 to Time 1. There was also a significant difference (P less than 0.05) in packed cell volumes between the unhandled and handled groups at Time 0 and Time 1 (28.6% v 25.2% and 27.6% v 25.0% respectively). There were no significant differences between the two groups in plasma sodium, plasma potassium or erythrocyte sodium.     

保护性耕作制度下的杂草治理

1耕作对杂草的潜在影响 数百年来。农民们一直利用耕作措施来消灭杂草。不过。耕作措施对杂草防除有利有弊。耕作可以根除、斩断或深埋杂草，从而消灭许多杂草植株。但间断性的耕作反而可能会加剧某些多年生杂草的发生，因为它将杂草的根茎或块茎斩成断节。使每节都有可能长成新的植株。此外，耕作农具可以将杂草碎段和种子扩散到整个地块。或从一块地扩散到另一块地。从上述角度讲。耕作促进了杂草的扩散。