Eosinophil populations in blood and bone marrow of normal guinea pigs

¹ Department of Anatomy, The University, Bristol, England

A quantitative study of eosinophil granulocytes of bone marrow and blood was carried out in 10 normal guinea pigs of approximately 400 gm body weight. Relative to the population of eosinophils in the blood, there was a very large population of eosinophil granulocytes in the bone marrow. About three-quarters of the marrow eosinophils were of the segmented or band form. These appeared to constitute a relatively large and readily available reserve of cells.