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Paramphistomum phillerouxi sp. nov. (Trematoda: Paramphistomatidae) and its Development in Bulinus forskalii

Published online by Cambridge University Press:  18 November 2009

J. A. Dinnik
J. A. Dinnik
Affiliation:
East African Veterinary Research Organization, Muguga, Kenya
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Extract

(1)Paramphistomum phillerouxi sp.nov. from rumina of cattle in Northern Rhodesia is described and its morphology compared with that of Paramphistomum microbothrium Fischoeder from Egypt, Kenya, Northern Rhodesia, and South Africa.

(2)Bulinus forskalii (Ehrenberg) is a natural intermediate host of P. phillerouxi in Northern Rhodesia and Tanganyika. Of other snails, Bulinus senegalensis (Muller) from Gambia was successfully infected experimentally, and Bulinus cernicus (Morelet) in Mauritius was found naturally infected with P. phillerouxi.

(3) The development of P. phillerouxi in Bitlinus forskalii is described. The sporocyst gives birth to 18 to 28 rediae. These firstgeneration rediae are able to produce daughter rediae as well as cercariae. It seemed that not all of the first-generation rediae started to produce daughter rediae first. Some of the rediae began by producing cercariae and produced a few daughter rediae later alongside numerous cercariae. There is some evidence that the subsequent generations of rediae are also capable of developing daughter rediae and cercariae simultaneously.

(4) The first young cercariae to leave the parent rediae were observed 21 days after exposure of the snails to a single miracidium each, and the first shedding of mature cercariae was noted 42 days after the exposure, the snails being kept at 20°C.

Type
Research Article
Information
Journal of Helminthology , Volume 35 , Issue 1-2 , March 1961 , pp. 69 - 90
Copyright
Copyright © Cambridge University Press 1961

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References

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