[Cytochemical study of various stages of life cycle of Toxoplasma gondii. 11. oxidation-reduction enzymes in the parasites during developmental stages in cat's intestines].
Dehydrogenases of glycolysis, Krebs' cycle and pentose phosphate shunt were investigated in the intestinal stages of T. gondii. The "oval stages" appeared to display the activity of all the enzymes studied differing in this from merozoites and macrogametocytes. The macrogametocytes displayed very low, if any, activity of the enzymes studied, even the mature parasites. Immediately after fertilization, sharp shifts were observed in the oxidative metabolism of the zygote: from very low or negative it became moderate to strong. This may be suggestive of the changes in metabolic requirements of the zygote which is no longer an intracellular parasite. In this respect macrogametocytes and zygotes of Toxoplasma resemble the corresponding stages of chicken and rabbit intestinal coccidia of the genus Eimeria.
D000818:Animals; D002415:Cats; D002952:Citric Acid Cycle; D004463:Ecology; D006019:Glycolysis; D006651:Histocytochemistry; D007422:Intestines / Q000469:parasitology; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000032:analysis / Q000378:metabolism*; D010428:Pentosephosphates / Q000378:metabolism; D014122:Toxoplasma / Q000254:growth & development / Q000378:metabolism*
D010428:Pentosephosphates; D010088:Oxidoreductases
Tsitokhimicheskoe issledovanie raznykh stadiĭ zhiznennogo tsikla Toxoplasma gondii. 11. Fermenty okisleniia-vosstanovleniia v parazitakh na stadiiakh razvitiia iz kishechnika koshki.