Studies on the life-history of Bunostomum phlebotomum (Railliet, 1900), a hookworm parasite of cattle.

摘要: A description is given of the processes copulation, formation egg and spermatozoon, cleavage, embryogeny hatching in B. phlebotomum. These were found to be essentially similar those other strongyle nematodes. The anatomy first three larval stages described observations Conradi & Barnette (1908) Schwartz (1924) largely confirmed. Penetration skin calves by infective larva was observed histologically. larvae have reached dermis within 30 min. penetrated cutaneous blood vessels 60 application skin. lung where third ecdysis progress 10 days after penetration growth third-stage lung, changes which take place during ecdysis, fourth-stage larva. exsheath lungs travel intestine. After a period sexual differentiation takes place, fourth occurs adult parasite emerges. time required for attainment maturity somewhere between 56 This paper written at Ministry Agriculture Fisheries Veterinary Laboratories, Wey-bridge, writer would like express his gratitude Director, Prof. T. Dalling, also Dr W. R. Wooldridge, chairman Council Educational Trust their help encouragement. writer's thanks are due H. A. Baylis, Leiper E. L. Taylor advice on technical points, Mr O. Shonekan, African laboratory assistant, able co-operation.