Figure 3. Counting cells of interests using the New Whole Field method.

These schematic diagrams show the whole field of a microscope with RBCs (red circles), parasitized RBCs (red circles with blue square) and Miller reticle in the center, depicting three different scenarios for counting the parasitized cells. For parasitemia determination using the reticle method, only parasitized RBCs in (a) and (b) will be considered, whereas the whole field counting method would include parasitized RBCs in all three scenarios. One can approximate the area of half of the whole field and include parasitized cells falling at the edge of that half.