Cytochemical study of the cyst stages of the sarcosporidian, Sarcocystis ovifelis

Cysts and cyst stages (merozoites) of Sarcocystis ovifelis were studied using methods of light microscope cytochemistry for detecting nucleic acids, proteins, polysaccharids, lipids and phosphatases, the latter substances being examined with negative results. DNA has been localized in the zoites whereas high contents of RNA and amylopectin were seen in cytoplasm. Tannofilic protein was detected evenly distributed both in the nucleus and cytoplasm.