Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-22T00:08:39.187Z Has data issue: false hasContentIssue false
  • English
  • Français

The influence of second intermediate host dispersion pattern upon the transmission of cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae)

Published online by Cambridge University Press:  06 April 2009

A. M. McCarthy
A. M. McCarthy
Affiliation:
Division of Biosphere Sciences, King's College London, University of London, Kensington, London W8 7AH
Get access Rights & Permissions [Opens in a new window]

Summary

Transmission of cercariae of the echinostome digenean Echinoparyphium recurvatum was observed in experimental populations of the second intermediate host snail Lymnaea peregra. Populations of 100 snails were distributed among plastic mesh cages in an infection arena to produce different patterns of host dispersion. Cercarial transmission was investigated in host populations showing three separate patterns of host dispersion; Ideal Regular, Random and Contagious (‘Clumped’). Levels of cercarial transmission in populations showing each type of dispersion pattern were found to be significantly different. The highest rate of cercarial transmission occurred in the contagiously dispersed host population, and the lowest in the randomly dispersed population. Analysis of results from the randomly dispersed population also showed that both the mean percentage prevalence of infection, and also the mean number of cysts recovered per snail, increased significantly with the number of snails per cage. The positive relationship between the mean number of cysts per snail and the number of snails per cage was found to be best described by an exponential function. Chemosensory location of L. peregra snail hosts by E. recurvatum cercariae may provide an explanation for the patterns of cercarial transmission observed.

Keywords

echinostomeEchinoparyphium recurvatumcercarial transmissionhost dispersion patternssecond intermediate hostsLymnaea peregra
Type
Research Article
Information
Parasitology , Volume 101 , Issue 1 , August 1990 , pp. 43 - 47
Copyright
Copyright © Cambridge University Press 1990

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

Anderson, R. M., Mercer, J. G., Wilson, R. A. & Carter, N. P. (1982). Transmission of Schistosoma mansoni from man to snail; experimental studies of miracidial survival and infectivity in relation to larval age, water temperature, host size and host age. Parasitology 85, 339–60.CrossRefGoogle Scholar
Elliott, J. M. (1983). Some methods for the statistical analysis of samples of benthic invertebrates. Freshwater Biological Association Scientific Publications No. 25.Google Scholar
Evans, N. A. (1984). The influence of snail host dispersion pattern upon the transmission of Schistosoma mansoni miracidia. Proceedings of the 4th European Multicolloquium of Parasitology, Izmir, Turkey, p. 111.Google Scholar
Evans, N. A. (1985). The influence of environmental temperature upon transmission of the cercariae of Echinostoma liei (Digenea: Echinostomatidae). Parasitology 90, 269–75.CrossRefGoogle Scholar
Evans, N. A. & Gordon, D. M. (1983). Experimental studies on transmission dynamics of the cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae). Parasitology 87, 167–74.CrossRefGoogle Scholar
Fried, B. & Fujino, T. (1987). Argentophilic and scanning electron microscopic observations of the tegumentary papillae of Echinostoma revolutum (Trematoda) cercariae. Journal of Parasitology 73, 1169–74.CrossRefGoogle ScholarPubMed
Fried, B. & King, B. W. (1989). Attraction of Echinostoma revolutum cercariae to Biomphalaria glabrata dialysate. Journal of Parasitology 75, 55–7.CrossRefGoogle Scholar
H.M.S.O. (1969). Fish Toxicity Tests. Her Majesty's Stationary Office Leaflet Number Dd. 139779 K36 12/69.Google Scholar
McCarthy, A. M. (1989). The biology and transmission dynamics of Echinoparyphium recurvatum (Digenea: Echinostomatidae). Ph.D. thesis, King's College, University of London.Google Scholar
Prah, S. K. & James, C. (1977). The influence of physical factors on the survival and infectivity of miracidia of Schistosoma mansoni and S. haematobium. I. Effect of temperature and ultra-violet light. Journal of Helminthology 51, 73–85.CrossRefGoogle ScholarPubMed
Smyth, J. D. & Halton, D. W. (1983). The Physiology of Trematodes, 2nd Edn.Cambridge: Cambridge University Press.Google Scholar