Morphological, Histochemical and Ultrastructural Features of the Globule Leukocyte of the Bovine Respiratory Tract


Department of Veterinary Pathology, University of Ibadan, Ibadan, Oyo State, Nigeria

Department of Veterinary Pathology, University of Glasgow Veterinary School, Bearsden G61 IQH, Scotland


The histochemical and ultrastructural features of the globular leukocyte of the bovine respiratory tract is described and found to be similar to those localized in the abomasum and bile ducts of cattle. Histochemical analysis of these cells demonstrated low amounts of carboxylated mucin mixed with neutral mucin and large amounts of basic protein. Two types of globules were seen in the leucocytes; one with a homegeneous electron dense material and another with vesiculated, crastalloid containing bodies.