Pathology of Poultry Diseases

Cells involved in inflammation 1-Heterophils: have lance-shaped granules, lack myeloperoxidase and alkaline phosphatase, have glucuronidase and acid phosphatase : Very phagocytic Granules tend to round up in tissues, difficult to identify 2-Eosinophils: have spherical granules.

Function is not known; but it present in hypersensitivity and associated with eosinophilic enteritis in turkeys due to ascarids.

3-Basophils: contain histamine, involved in acute inflammation.

4-Thrombocytes: small round to oval cells with clear cytoplasm and small round nucleus (looks like small lymphocyte), phagocytic 5-Monocytes: precursors to cells of MPS, phagocytic, can fuse together to form multinucleated giant cells and make monokines; IL-1, IL-2, TNF, G-CSF, gamma interferon.

6-Lymphocytes: various morphologies involved in subacute inflammation including plasma cells.