Hostname: page-component-848d4c4894-wzw2p Total loading time: 0 Render date: 2024-05-26T19:13:36.235Z Has data issue: false hasContentIssue false
  • English
  • Français

Experimental studies on the transmission dynamics of the cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae)

Published online by Cambridge University Press:  06 April 2009

N. A. Evans  and
D. M. Gordon
N. A. Evans
Affiliation:
Department of Zoology, King's College London, Strand, London WC2R 2LS
D. M. Gordon
Affiliation:
Department of Zoology, King's College London, Strand, London WC2R 2LS
Get access Rights & Permissions [Opens in a new window]

Summary

Age-dependent survival and infectivity characteristics are described for the cercariae of Echinoparyphium recurvatum. At 18 °C the maximum life-span of the cercariae was 48 h and 50% survival occurred at 30·5 h. Infectivity of cercariae to the second intermediate host, Lymnaea peregra was maximal approximately 2 h after emission from the first intermediate host and it subsequently declined to zero at 19 h. It is suggested that the period of sub-maximal infectivity at the beginning of the cercarial life-span may represent a phase during which dispersal is an important function of the larvae. The relationship between infective stage density and establishment success was linear up to densities equivalent to 5000 cercariae/1. At higher cercarial densities the proportion of parasites establishing in second intermediate hosts declined progressively with increasing cercarial density. The mean number of parasites establishing/host increased linearly with increasing host size.

Type
Research Article
Information
Parasitology , Volume 87 , Issue 1 , August 1983 , pp. 167 - 174
Copyright
Copyright © Cambridge University Press 1983

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. (1976). Dynamic aspects of parasite population ecology. In Ecological Aspects of Parasitology (ed. Kennedy, C. R.), pp. 431–62. Amsterdam: North Holland Publishing Company.Google Scholar
Anderson, R. M. (1978). Population dynamics of snail infection by miracidia. Parasitology 77, 201–24.CrossRefGoogle ScholarPubMed
Anderson, R. M. & Lethbridge, R. C. (1975). An experimental study of the survival characteristics, activity and energy reserves of the hexacanths of Hymenolepis diminuta. Parasitology 71, 137–52.CrossRefGoogle ScholarPubMed
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
Anderson, R. M. & Whitfield, P. J. (1975). Survival characteristics of the free-living cercarial population of the ectoparasitic digenean, Transversotrema patialense. Parasitology 70, 295–310.CrossRefGoogle Scholar
Anderson, R. M., Whitfield, P. J. & Dobson, A. P. (1978). Experimental studies of infection dynamics: infection of the definitive host by cercariae of Transversotrema patialense. Parasitology 77, 189–200.CrossRefGoogle ScholarPubMed
Anderson, R. M., Whitfield, P. J. & Mills, C. A. (1977). An experimental study of the population dynamics of an ectoparasitic digenean, Transversotrema patialense: the cercarial and adult stages. Journal of Animal Ecology 46, 555–80.CrossRefGoogle Scholar
Bundy, D. A. P. (1981). Survival characteristics of the free-living miracidial population of Transversotrema patialense (Soparkar) (Digenea: Transversotrematidae). Journal of Parasitology 67–531.Google Scholar
Campbell, W. C. & Todd, A. C. (1955). Behaviour of the miracidium of Fascioloides magna (Bassi, 1875) Ward 1917 in the presence of a snail host. Transactions of the American Microscopical Society 74, 342–6.CrossRefGoogle Scholar
Carter, N. P., Anderson, R. M. & Wilson, R. A. (1982). Transmission of Schistosoma mansoni from man to snail: laboratory studies on the influence of snail and miracidial densities on transmission success. Parasitology 85, 361–72.CrossRefGoogle Scholar
Croll, N. A. & Matthews, B. E. (1973). Activity, ageing and penetration of hookworm larvae. Parasitology 66, 279–90.CrossRefGoogle ScholarPubMed
H.M.S.O. (1969). Fish Toxicity Tests. H.M.S.O. Leaflet, No. Dd. 139779 K36 12/69.Google Scholar
Keymer, A. E. (1981). Population dynamics of Hymenolepis diminuta in the intermediate host. Journal of Animal Ecology 50, 941–50.CrossRefGoogle Scholar
Keymer, A. E. & Anderson, R. M. (1979). The dynamics of infection of Tribolium confusum by Hymenolepis diminuta: the influence of infective-stage density and spatial distribution. Parasitology 79, 195–207.CrossRefGoogle ScholarPubMed
Llewellyn, J. (1972). Behaviour of monogeneans. In Behavioural Aspects of Parasite Transmission, (ed. Canning, E. U. and Wright, C. A.), pp. 19–30. London: Academic Press.Google Scholar
May, R. M. & Anderson, R. M. (1978). Regulation and stability of host–parasite population interactions. II. Destabilizing processes. Journal of Animal Ecology 47, 249–68.CrossRefGoogle Scholar
Scott, M. E. (1982). Reproductive potential of Gyrodactylus bullatarudis (Monogenea) in isolated guppies (Poecilia reticulata). Parasitology 85, 217–36.CrossRefGoogle Scholar
Stirewalt, M. A. & Fregeau, W. A. (1968). Effect of selected experimental conditions on penetration and maturation of cercariae of Schistosoma mansoni in Mice. II. Parasite-related conditions. Experimental Parasitology 22, 73–95.CrossRefGoogle ScholarPubMed
Ulmer, M. J. (1971). Site finding behaviour in helminths in intermediate and definitive hosts. In Ecology and Physiology of Parasites, (ed. Fallis, A. M.), pp. 123–160. Toronto: University of Toronto Press.CrossRefGoogle Scholar