title: [Passage of the microfilaria, Thamugadia ivaschkini, from the intestine into the hemocele of the sand flies of the genus Phlebotomus].
abstract: Sand flies of Ph. papatasii and Ph. caucasicus were experimentally infected with Th. ivaschkini. At daily fluctuations of air temperature from 27 to 32 degrees C and relative air humidity from 30 to 60% viable microfilarians migrate into haemocoel within the first 5-6 hours after the blood-sucking of vectors, before the peripheral membrane is completely formed. Most parasites leave the intestine before the formation of a blood clot, within the first 1.5 hour after feeding. The number of larvae overcoming the intestinal barrier (at studied levels of infection) does not depend on the number of devoured microfilarians and is close to 100%. Sand flies of the genus Phlebotomus lack physiological mechanisms limiting the migration of microfilarians from the intestine that causes a high mortality of these vectors at intensive infection.
mesh_terms: D000818:Animals; D001769:Blood / Q000469:parasitology; D004063:Digestion; D005370:Filarioidea / Q000502:physiology*; D006790:Host-Parasite Interactions; D007303:Insect Vectors; D008842:Microfilariae / Q000502:physiology*; D010691:Phlebotomus / Q000469:parasitology* / Q000502:physiology
vernacular_title: Vykhod mikrofiliariĭ Thamugadia ivaschkini is kishechnika v gemotsel' moskitov roda Phlebotomus.