Figure 2. Human liver histochemistry.

Gram staining of a human liver (magnification, ×80). After the Gram stain, human liver cells displayed fine blue granules that, for didactic reasons, are enclosed in the black circles, but they can be seen scattered in the parenchyma. Note the similarities between the amoebal Mimiviruses appearing as blue granules (small picture frame and Figure 1) with the human blue granules. In the human cells, the gram positive granules appear as fine granules and are distinct from bacteria and other pigment, like lipofucsin, that is also present (brown colour).