Sedimentation Rate of Erythrocytes in Chickens as Influenced by Method and Sex

Abstract

RATE of sedimentation of erythrocytes is dependent on two main forces: (1) the force of gravity, causing the cells to settle, and (2) the frictional resistance of the surrounding plasma which holds the cells in suspension. The role played by each of these forces is related to a number of factors, such as cell-size, shape and number, specific gravity of the cells and plasma, and composition of plasma. A decrease in specific gravity of plasma, or in cell numbers, tends to increase sedimentation rate. Sedimentation rates are frequently determined by clinicians, and when all aspects of the case are under review, may be of diagnostic significance. The rate may be increased during infections and in diseases associated with tissue injury. Less is known about sedimentation rate in chickens, because few reports are available, and in most instances, the effects of disease, age and sex have not been ascertained. Mean values . . .