[Interaction between Karyolysus sp. and rock lizard liver cells during hibernation].
During the rock lizard hibernation, no nuclear division occurs in the exoerythrocytar trophozoites of Karyolysus sp., found in hepatocytes or Kupffer's cells. In addition, organelles of the apical complex are seen persisting in these trophozoites, unlike the situation routinely observed in the majority of other intracellular sporozoans. Thus, the parasites under study can be compared with hypnozoites of other coccidia. The material being examined from natural rather than experimental conditions, during lizards' hibernation, the dynamics of host-parasite interrelations can be followed that involves the appearance in the infected cell of autophagous vacuoles, changes in mitochondrial structure and pattern of endoplasmic reticulum, the connection of the system of lamellar channels with the space of the parasitophorous vacuole. The results of the present observations may suggest, first, that during the host hibernation, exoerythrocytar trophozoites of Karyolysus being intracellular in their spatial distribution, are able to obtain nutrients from the outer, extracellular space, through the system of lamellar channels; second, that these channels can represent intercellular connections, which makes one consider the exoerythrocytar trophozoites as intercellular rather than intracellular parasites.
D000818:Animals; D003044:Coccidia / Q000254:growth & development*; D006605:Hibernation; D008099:Liver / Q000469:parasitology*; D008116:Lizards / Q000469:parasitology*
Vzaimodeĭstvie mezhdu koktsidieĭ Karyolysus sp. i kletkami pecheni skal'nykh iashcherits v period zimneĭ spiachki.