PECULIARITIES OF EMBRYONIC AND POST-EMBRYONIC DEVELOPMENT OF OESOPHAGOSTOMUM DENTATUM (NEMATODA, STRONGYLIDAE) LARVAE CULTURED IN VITRO

Abstract

Morphometric peculiarities of the development of Оesophagostomum dentatum Rudolphi, 1803 from egg to infective larva were studied under laboratory conditions at various temperatures. Th e determined optimum temperature for embryonic and postembryonic development of О. dentatum larvae from domestic pig (Sus scrofa domesticus Linnaeus, 1758) is 22 °С. At this temperature, 81 % of larvae develop to the third stage (L3) on the 10th day. Temperatures of 24 °С and 20 °С are less favorable for the development of the nematode, at those temperatures only 67 and 63 % of larvae, respectively, reached infective stage by the 10th day of cultivation. Embryonic development of О. dentatum eggs is characterized by their lengthening (by 8.87–9.50 %, р < 0.01) and widening (by 6.77–9.35 %, р < 0.05–0.01), and post-embryonic larval development is associated with lengthening (by 4.59–17.33 %, р < 0.01–0.001).