Oxidation-reduction enzymes in the cyst stages of the sarcosporidian, Sarcocystis ovifelis

Using methods of light microscope cytochemistry, the availability of oxidative enzymes were examined in the cyst stages (merozoites) of Sarcocystis ovifelis. Enzymes of glycolysis, Krebs' cycle and pentose--phosphate way of oxidation were detected suggesting a mixed character of merozoite's oxidative metabolism. A weak activity of glutamate dehydrogenase (an enzyme involved in protein metabolism) was shown in merozoites in addition to the absence of beta-hydroxybutyrate dehydrogenase (an enzyme of lipid metabolism).