Human elements - Macrophages

The presence of red-staining structures within the cell might suggest to the inexperienced eye that this is an amoebic trophozoite that has ingested red blood cell.

Note the RBC's in the field.

Macrophages and Red Blood Cells
Trichrome stain
light microscopy x 1000

The size, shape and phagocytized material inside may suggest an amoeba. The appearance of a chromatoidal bar is also evident.

Macrophage
Light microscopy x1000, Trichrome stain

Could be confused with Entamoeba coli or Entamoeba histolytica

Macrophage
Phase contrast x400

The size, shape and the phagocytized material inside may suggest an amoeba.