infectious diseases
Microscopy
Trichrome stain (Gomori Wheatley stain) and iron hematoxylin stain
These stains are used to detect intestinal protozoa. TheGomori-Wheatley stainis used to detect microsporidia. It may miss helminth eggs and larvae and does not reliably identifyCryptosporidium. Fungi and human cells take up the stain. Theiron hematoxylin staindifferentially stains cells, cell inclusions, and nuclei. Helminth eggs may stain too dark to permit identification. 