title: [Heat resistance of the cercariae of serveral species of trematodes].
abstract: Cercariae of Echinostoma sp., Cotylurus cornutus, Cercaria C Szidat, marites of which parasitize homeothermic hosts (birds), were found to have a high heat resistance at the effect of lethal temperature. There were established specific differences in the temperature level and its stability during a long period at a relatively constant environmental temperature. Thé heat resistance of cercariae of the same species does not change during their parasitism in different species of mollusks, hosts (e. g. C. C Szidat). Thermoresistance of mature cercariae of C. C Szidat and Cotylurus cornutus having entered the water is in agreement with the environmental temperature and changes with a temperature regime of the environment. Even an acclimation within 3 hours at 29 degrees results in a rise of the heat resistance of cercariae. Their stay at 4 degrees within 3 hours decreases two times the heat resistance.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D001717:Birds / Q000469:parasitology; D004449:Echinostoma / Q000502:physiology; D006358:Hot Temperature; D008195:Lymnaea / Q000469:parasitology; D014200:Trematoda / Q000502:physiology*
vernacular_title: Materialy po teploustoĭchivosti tserkarii nekotorykh vidov trematod