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On a New Parasitic Protozoon associated with a Sickness in a Bilharzian Intermediate Host

Published online by Cambridge University Press:  18 November 2009

Marjorie J. Triffitt
Affiliation:
(Field Officers, Institute of Agricultural Parasitology.)
J. J. C. Buckley
Affiliation:
(Field Officers, Institute of Agricultural Parasitology.)
W. A. McDonald
Affiliation:
(Collector and Class Demonstrator, Department of Helminthology, London School of Hygiene and Tropical Medicine.)

Extract

During a recent expedition carried out by Dr. W. K. Blackie and Mr. W. A. McDonald in Southern Rhodesia, large numbers of the snail Bulinus tropicus were collected for living storage in aquarium tanks in the Medical Zoology Division of the London School of Hygiene and Tropical Medicine. They were collected about the 20th February, 1931 and were brought to London on the 30th March and were distributed amongst several separate tanks. Some five weeks later some of the snails were overtaken by a curious sickness which gradually but rapidly spread to the rest and within a fortnight of their first appearance, the characteristic symptoms were present to a greater or less degree in almost every one of the snails, which numbered several hundreds. The sickness proved fatal in many cases and towards the end of three weeks the mortality was nearly 50 per cent. Thus it appeared likely that the whole collection would eventually be destroyed when the epidemic, as it seemed to be, spent itself with surprising suddenness and the remaining snails made a rapid recovery.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 1932

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