[Emergence of Thamugadia ivaschkini microfilaria from the stomach into the hemocoel of Sergentomyia arpaklensis sandflies].

Regularities of migration of microfilarians from the stomach to haemocoel in connection with blood digestion and peritrophic membrane formation were studied in sandflies of S. arpaklensis experimentally infected with larvae of Th. ivaschkini. Whatever the number of swallowed parasites, the average number of larvae reaching the haemocoel does not exceed 5. Factors limiting the invasion are the thick layer of prosecretion of the peritrophic membrane and a peculiar way of clot formation during the feeding of S. arpaklensis sandflies with blood of reptiles. The results obtained are compared with data on members of the genus Phlebotomus and other bloodsucking Diptera.