Normal Platelets
Morphology: platelets are small anucleate cells with round to oval shape and small pink or red cytoplasmic granules. Normal platelets are smaller than red blood cells. Canine platelets are moderately… Read more Normal Platelets →
Trypanosomes
Morphology: elongated organism with undulating membrane, dark nucleus located centrally, small round purple dot (kinetoplast) located at anterior end, and flagellum extending from posterior end. Usually seen in a curved C… Read more Trypanosomes →
Reactive Lymphocytes
Morphology: reactive lymphocytes have a heterogenous appearance with variable size, nuclear shape, and amount and color of cytoplasm. Compared to non-reactive lymphocytes, reactive lymphocytes are usually larger with darker blue cytoplasm,… Read more Reactive Lymphocytes →
Granular Lymphocytes
Morphology: lymphocytes with pink or red cytoplasmic granules. Granular lymphocytes are either cytotoxic T-cells or natural killer cells. Look alike: granulocytes (eosinophils, basophils) Clinical relevance: present in low numbers in healthy animals… Read more Granular Lymphocytes →
Neutrophils
Also called: mature neutrophils, segmented neutrophils (segs), polymorphonuclear cells (PMN) Morphology: granulocyte with an indented (segmented) nucleus and white or pale pink cytoplasm. Canine and bovine neutrophils may contain small pink… Read more Neutrophils →
Poikilocytosis
Morphology: poikilocyte is a generic term to describe red blood cells with abnormal shape. Poikilocytosis refers to large numbers of abnormally shaped red blood cells. Commonly seen with: poikilocytosis may include… Read more Poikilocytosis →
Monocytes
Morphology: leukocytes with pleomorphic nuclei (usually lobulated but may be round or kidney-shaped) and blue-gray cytoplasm containing occasional vacuoles or fine pink granules. Monocytes are larger than most other leukocytes.… Read more Monocytes →
Mature Lymphocytes
Morphology: small round leukocytes with round or indented nuclei, dark clumped chromatin, and small amounts of light blue cytoplasm. Cattle have small lymphocytes (as described), as well as large lymphocytes with… Read more Mature Lymphocytes →
Cells and Smears 