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An histological and ultrastructural study of Thelohania contejeani Henneguy, 1892 (Nosematidae), Microsporidian parasite of the crayfish Austropotamobius pallipes Lereboullet

Published online by Cambridge University Press:  06 April 2009

A. R. Cossins  and
K. Bowler
A. R. Cossins
Affiliation:
Department of Zoology, University of Durham, Durham City, DH1 3LE, U.K.
K. Bowler
Affiliation:
Department of Zoology, University of Durham, Durham City, DH1 3LE, U.K.
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Extract

An outbreak of the Microsporidian parasite Thelohania contejeani is reported in a population of Austropotamobius pallipes in Northumberland, U.K. Since less than 10% of all crayfish caught were infected it is concluded that T. contejeani has no serious effect on the population studied. The mode of transmission of the parasite from host to host is discussed.

The host–parasite relationship and life-cycle of T. contejeani were studied using histological and electron microscope techniques. Spores were observed in some detail, and diplocarya, sporont and pansporoblast stages were identified within the general spore mass that invades host muscle tissue. Using serial sections the sporoblast ‘diplocaryon’ was shown to be a single nucleus with a deep cleft. T. contejeani was found to occur mainly in striated muscle, although it was found in cell bodies in the central nervous system.

Type
Research Article
Information
Parasitology , Volume 68 , Issue 1 , February 1974 , pp. 81 - 91
Copyright
Copyright © Cambridge University Press 1974

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