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Effects of infection with Angiostrongylus cantonensis on the circulating haemocyte population and the haematopoietic organ of the host snail M-line Biomphalaria glabrata

Published online by Cambridge University Press:  05 June 2009

S. Noda  and
A. Sato
S. Noda
Affiliation:
Department of Medical Zoology, Faculty of Medicine, Kagoshima University, Usuki, Kagoshima 890, Japan
A. Sato
Affiliation:
Department of Medical Zoology, Faculty of Medicine, Kagoshima University, Usuki, Kagoshima 890, Japan
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Abstract

The number of circulating haemocytes, the size of the haematopoietic organ, and the size of haemocyte capsules around the parasite were studied in M-line Biomphalaria glabrata snails exposed to 100 or 400 first-stage larvae of Angiostrongylus cantonensis. The number of haemocytes in exposed snails increased significantly at 1 day post-exposure, decreased to control value, and then increased again. The decrease in number of circulating haemocytes is probably due to the removal of cells from the circulation to participate in encapsulation of larvae. The majority of circulating haemocytes in M-line B. glabrata are fully-spread granulocytes, which increase significantly in number in snails following exposure to A. cantonensis larvae. However, populations of partially-spread granulocytes, round cells, hyalinocytes and miscellaneous haemocytes were relatively constant. The size of capsules around the parasite increased during the 42-day interval of the experiment. The haematopoietic organ increased in size in response to infection.

Keywords

Angiostrongylus cantonensisBiomphalaria glabratahaemocytehaematopoietic organimmunity
Type
Research Article
Information
Journal of Helminthology , Volume 64 , Issue 3 , September 1990 , pp. 239 - 247
Copyright
Copyright © Cambridge University Press 1990

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