Studies on phosphatase systems in hepatopancreatic cells of the molluscan host of Echinoparyphium sp. and in the rediae and cercariae of this trematode | Parasitology | Cambridge Core (original) (raw)

Extract

1. The distribution of acid and alkaline phosphatases in the hepatopancreatic cells of the molluscan host of Echinoparyphium sp. and in the redia and cercaria of this trematode has been studied.

2. There is a heavier concentration of acid phosphatase in the hepatopancreas of infected snails than in uninfected snails.

3. No acid phosphatase is present in the bodies of the rediae or cercariae but this enzyme is present in the contents of the redial caeca.

4. Alkaline phosphatase activity is greater in the hepatopancreas of infected snails than in uninfected snails.

5. Alkaline phosphatase is present in the tissues of the rediae and the cercariae, especially in the fully developed cercariae.

6. It is suspected that the increase in acid and alkaline phosphatases in Helisoma trivolvis infected with Echinoparyphium redia is correlated with the breakdown of glycogen by the parasite.

This research was made possible by Grants E-3443, E-3443C1, and AI 3443–03 from the Institute of Allergy and Infectious Diseases, National Institutes of Health, U.S. Public Health Service. The author is grateful to Mr Randall W. Snyder, Jr., School of Medicine, The University of Virginia, for technical assistance.

References

Cheng, T. C. (1963). The effects of Echinoparyphium larvae on the structure of and glycogen deposition in the hepatopancreas of Helisoma trivolvis and glycogenesis in the parasite larvae. Malacologia 1, 291–303.Google Scholar

Cheng, T. C. & Snyder, R. W. Jr (1962 a). Studies on host-parasite relationships between larval trematodes and their hosts. I. A review. II. The utilization of the host's glycogen by the intramolluscan larvae of Glypthelmins pennsylvaniensis Cheng, and associated phenomena. Trans. Amer. micr. Soc. 81, 209–28.CrossRefGoogle Scholar

Cheng, T. C. & Snyder, R. W. Jr (1962 b). Studies on host-parasite relationships between larval trematodes and their hosts. III. Certain aspects of lipid metabolism in Helisoma trivolvis (Say) infected with the larvae of Glypthelmins pennsylvaniensis Cheng and related phenomena. Trans. Amer. micr. Soc. 81, 327–31.CrossRefGoogle Scholar

Cheng, T. C. & Snyder, R. W. Jr (1962 c). Phosphatase activity in hepatopancreatic cells of Helisoma trivolvis infected with rediae of Echinoparyphium sp. (Trematoda: Echinostomatidae). Amer. Zool. 2, 513.Google Scholar

Cheng, T. C. & Snyder, R. W. Jr (1963). Studies on host-parasite relationships between larval trematodes and their hosts. IV. A histochemical determination of glucose and its role in the metabolism of molluscan host and parasite. Trans. Amer. micr. Soc. 82, 343–46.CrossRefGoogle Scholar

Coil, W. H. (1958). Alkaline phosphatase in the trematode excretory system. Proc. helm. Soc. Wash. 25, 137–8.Google Scholar

Erasmus, D. A. (1957 a). Studies on phosphatase systems of cestodes. I. Studies on Taenia pisiformis (cysticercus and adult). Parasitology, 47, 70–80.Google Scholar

Erasmus, D. A. (1957 b). Studies on phosphatase systems of cestodes. II. Studies on Cysticercus tenuicollis and Moniezia expansa (adult). Parasitology, 47, 81–91.Google Scholar

Fruton, J. S. & Simmonds, S. (1960). General Biochemistry, 2nd ed. New York: John Wiley and Sons.Google Scholar

Gomori, G. (1946). The study of enzymes in tissue sections. Amer. J. clin. Path. 16, 347–52.CrossRefGoogle Scholar

Gomori, G. (1950). An improved histochemical technic for acid phosphatase. Stain Tech. 25, 81–5.CrossRefGoogle Scholar

Hurst, C. T. (1927). Structural and functional changes produced in the gastropod mollusk, Physa occidentalis, in the case of parasitism by the larvae of Echinostoma revolutum. Univ. Calif. Publ. Zool. 29, 321–404.Google Scholar

Pennoit-de Cooman, E. & van Grembergen, G. (1942). Vergelijkend Onderzoek van het Fermentensystem bij vrijlevende en parasitaire Plathelminthen. Verh. vlaam. Acad. Wet. 4, 7–77.Google Scholar

Von Brand, T. (1952). Chemical Physiology of Endoparasitic Animals. New York: Academic Press.Google Scholar