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Department of Marine Bioscience, Gangneung-Wonju National University, Gangneung, 210-702, KoreaHydrolase activities of excretory-secretory products (ESP) and somatic extracts (SE) from Anisakis simplex sensu stricto (s.s.) and Anisakis pegreffii larvae were investigated by using API ZYM kit. In esterase group, acid phosphatase showed high activity from both of A. simplex (s.s.) and A. pegreffii. Esterase (C4) showed activity only from SE and A. simplex (s.s.) showed higher activity than A. pegreffii. Alkaline phosphatase, acid phosphatase and naphthol-AS-BI-phosphohydrolase showed higher activity in 3rd stage larvae than in 4th stage larvae of both species. In aminopeptidase group, only leucine arylamidase showed remarkable activity in SE of both anisakid species, and A. simplex (s.s.) SE showed higher activity than A. pegreffii SE. In glycosidase group, N-acetyl-β-glucosaminidase, α-mannosidase, α-fucosidase showed higher activity in A. simplex (s.s.) than A. pegreffii, and 4th larvae showed higher activity than 3rd larvae. These differences in hydrolase activity of anisakid nematodes larvae are thought to be due to different metabolism such as growth, moulting, digestion and feeding. Key words: Anisakis simplex sensu stricto, Anisakis pegreffii, Hydrolase activities, API ZYM

han-gug eobyeong hag-hoeji/journal of fish pathology

A comparison of the hydrolase activities of excretory-secretory products and somatic extracts from fish parasitic nematodes, Anisakis simplex sensu stricto and Anisakis pegreffii larvae