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Megakaryoblast Morphology

Megakaryoblast :It’s is a precursor cell , which in turn becomes a megakaryocyte during haematopoiesis. It is the beginning of the thrombocytic series. Size: 7 – 35 ...

Lancefield Grouping of Streptococci

Serotyping of Streptococcus called Lancefield grouping, and it classify streptococcus bacteria based on antigens found on their cell walls.

PYRase Test

PYRase Test is colorimetric enzymatic test for detection of pyrrolidonyl peptidase (PYRase), an enzyme produced by all common species of Enterococci and 98% strains of S. pyogenes. ...

Oxidase Test

Purpose The oxidase test is a biochemical reaction that assays for the presence of cytochrome oxidase, an enzyme sometimes called indophenol oxidase. In the presence of an organism ...

Antibody Structure

  Antibody Structure , IgM + IgG + IgA

Alpha Thalassemia and Hemoglobin comparison


Struvite crystals

Struvite crystals (magnesium ammonium phosphate, triple phosphate) usually appear as colorless, 3-dimensional, prism-like crystals (“coffin lids”). Occasionally, they instead ...

Polymorphonuclear leukocytes

Left, wet mount examination. Right, trichrome stain. These cells are often mistaken by inexperienced microscopists as amoebic cysts. The fact that the areas taken up by the nucleus ...

Indole Test

Principle The test organism is inoculated into tryptone broth, a rich source of the amino acid tryptophan. Indole positive bacteria such as Escherichia coli produce tryptophanase, ...

Gray platelet syndrome (GPS)

The gray platelet syndrome (GPS) is a rare inherited disorder characterized by mild to moderate bleeding tendency, moderate thrombocytopenia, and a marked decrease or absence of platelet ...

Two Basophils in a Smear

Basophils contain large cytoplasmic granules which obscure the cell nucleus under the microscope. Basophils contain anticoagulant heparin, which prevents blood from clotting too ...

Platelets Morphology

Size: 1.5 – 3 µm in diameter Nucleus: absent Cytoplasma: pale blue + purple granules Platelet Count in blood: (150–450)×10^9/L
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