Hostname: page-component-848d4c4894-wg55d Total loading time: 0 Render date: 2024-05-16T02:48:02.565Z Has data issue: false hasContentIssue false
  • English
  • Français

The output of cercariae of Fasciola hepatica by Lymnaea truncatula and the distribution of metacercariae on grass

Published online by Cambridge University Press:  06 April 2009

J. K. M. Hodasi
J. K. M. Hodasi
Affiliation:
Zoology Department, University of Ghana, Legon, Ghana
Get access Rights & Permissions [Opens in a new window]

Extract

It has been demonstrated that under normal laboratory conditions Lymnaea truncatula infected with Fasciola hepatica are not able to shed all their cercarial loads before their death. Cercariae are irregularly released over an extended period and considerable variations (4–1789) occur in their output.

Laboratory studies have revealed that the green parts of grass (Dactylis glomerata) are preferred to the brown, dead parts by the cercariae of Fasciola hepatica for metacercariae formation. More cysts are formed on the lower surface of submerged leaves than on the upper surface.

There is vertical zonation of metacercariae on grass in water. More cysts occur on the upper parts of submerged grass than on the lower parts.

Vertical migration of cercariae after settling does not usually occur before cyst formation.

The results are tabulated and discussed and correlated with conditio s in the field.

This work was undertaken in the Department of Zoology, University of Bristol, Bristol, under the supervision of Dr H. D. Crofton, to whom I wish to express my gratitude.

Type
Research Article
Information
Parasitology , Volume 64 , Issue 1 , February 1972 , pp. 53 - 60
Copyright
Copyright © Cambridge University Press 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Alicata, J. E. (1938). Observations on the life history of Fasciola gigantica, the common liver fluke of cattle in Hawaii, and the intermediate host, Fossaria ollula. Bulletin of Hawaii Agricultural Experiment Station, number 80, pp. 1–22.Google Scholar
Boray, J. C. (1969). Experimental fascioliasis in Australia. In Advances in Parasitology (ed. Ben, Dawes), pp. 95–210. London: Academic Press.Google Scholar
Boray, J. C. & Enigk, K. (1964). Laboratory studies on the survival and infectivity of Fasciola hepatica and F. gigantica – metacercariae. Zeitschrift fur Tropenmedizin und Parasitologie 15, 324–31.Google ScholarPubMed
Kendall, S. B. (1949). Nutritional factors affecting the rate of development of Fasciola hepatica in Limnaea truncatula. Journal of Helminthology 23, 179–90.CrossRefGoogle Scholar
Kendall, S. B. (1965). Relationships between the species of Fasciola and their molluscan hosts. In Advances in Parasitology (ed. Ben, Dawes), pp. 59–98. London: Academic Press.Google Scholar
Kendall, S. B. & McCullough, F. S. (1951). The emergence of the cercaria of Fasciola hepatica from the snail Limnaea truncatula. Journal of Helminthology 25, 77–92.CrossRefGoogle Scholar
Krull, W. H. (1941). The number of cercariae of Fasciola hepatica developing in snails infected with a single miracidium. Proceedings of the Helminthological Society of Washington 8, 55–58.Google Scholar
Lo, Chin-Tsong. (1967). Life history of the snail Segmentina hemisphaerula (Benson), and its experimental infection with Fasciolopsis buski (Lankester). Journal of Parasitology 53, 735.CrossRefGoogle ScholarPubMed
Roberts, E. W. (1950). Studies on the life cycle of Fasciola hepatica (Linnaeus) and of its snail host, Limnaea (Galba) truncatula (Muller) in the field and under controlled conditions in the laboratory. Annals of Tropical Medicine and Parasitology 44, 187–206.CrossRefGoogle Scholar
Ross, I. C. (1930). Some observations on the bionomics of Fasciola hepatica. Japanese Journal of Experimental Medicine 8, 65–69.Google Scholar
Ross, I. C. & McKay, A. C. (1929). The bionomics of Fasciola hepatica in New South Wales and of the intermediate host Limnaea brazieri (Smith). Bulletin of Council for Scientific and Industrial Research, Australia 43, 1–62.Google Scholar
Shirai, M. (1927). The biological observation on the cysts of Fasciola hepatica and the route of migration of young worms in the final host. Scientific Reports of Government Institute of Infectious Diseases, Tokyo 6, 511–23.Google Scholar
Sinitsyn, D. F. (1914). Neure Tatsachen über die Biologie der Fasciola hepatica L. Zentralblatt fur Bakteriologie, Parasitenkunde, Infecktionskrankheiten und Hygiene 74, 280–85.Google Scholar
Sturrock, B. M. (1967). The effect of infection with Schistosoma haematobium on the growth and reproduction rates of Bulinus (Physopsis) nasutus productus. Annals of Tropical Medicine and Parasitology 61, 321–25.CrossRefGoogle ScholarPubMed