Abstract
Beaver J. P. and Dobson C. 1978. Acetylcholinesterase levels in Angiostrongylus cantonensis in relation to the immune response in rats. International Journal for Parasitology 8: 9–13. Angiostrongylus cantonensis larvae and adult nematodes synthesize three acetylcholinesterase (AChE) isozymes. The K m of this isozyme complex changes with the development and migrations of the parasite in the rat host. The levels of parasite AChE changed as the development of A. cantonensis progressed; increasing quantities of AChE were found in young adult A. cantonensis from the brain of rats. After migration to the pulmonary arteries, the quantity of AChE in the parasite was reduced and continued to decline in the aging parasite. Anti- A. cantonensis antibody inhibited parasite AChE activity; this inhibition of the parasite AChE activity changed at stages during development of the parasite which suggested variation in parasite AChE isozyme levels. Haemagglutinating anti- A. cantonensis antibody appeared in the serum of infected rats when the parasites commenced to lay eggs and increased in titre thereafter until 103 days after infection.
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