N.J. Morley, M. Crane and J.W. Lewis (2002) Toxic effects of cadmium and zinc on the transmission of Echinoparyphium recurvatum cercariae. Journal of Helminthology , 76 (). pp. 157–163. ISSN 0022-149X
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The toxicity of cadmium, zinc and Cd/Zn mixtures to the transmission of Echinoparyphium recurvatum (Digenea: Echinostomatidae) cercariae into the snail second intermediate hosts was investigated at concentrations ranging from 100mg l21 to 10 000mg l21 in both soft and hard water. A differential response in the infectivity of metal-exposed cercariae into Lymnaea peregra and Physa fontinalis was demonstrated which was dependent on the snail species being infected. Exposure of L. peregra, P. fontinalis, and L. stagnalis to heavy metals caused a differing susceptibility to E. recurvatum cercariae depending on the snail species being exposed. The mechanism and effects of metal toxicity, together with the importance of the parasite/host strain on cercarial transmission are discussed.
This is a Published version This version's date is: 2002 This item is peer reviewed
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Deposited by Al Dean (ZSRA118) on 02-Mar-2010 in Royal Holloway Research Online.Last modified on 07-Jan-2011
(C) 2002Cambridge Journals, whose permission to mount this version for private study and research is acknowledged. The repository version is the author's final draft.
Abd Allah, A.T., Wanas, M.Q. & Thompson, S.N. (1996) The effects of lead, cadmium, and mercury on the mortality and infectivity of Schistosoma mansoni cercariae. Journal of Parasitology 82, 1024-1026.
Adam, M.E. (1991) Ecological studies on larval digeneans parasitizing freshwater molluscs in the lower Thames valley. PhD thesis, Royal Holloway and Bedford New College, University of London, UK.
Adam, M.E. & Lewis, J.W. (1992) Sites of encystment by the metacercariae of Echinoparyphium recurvatum in Lymnaea peregra. Journal of Helminthology 66, 96-99.
Calow, P. (1981) Adaptational aspects of growth and reproduction in Lymnaea peregra (Gastropoda: Pulmonata) from exposed and sheltered aquatic habitats. Malacologia 21, 5-13.
Dragneva, N. & Kanev, I. (1983) Antigen similarity between redia and cercariae of Echinoparyphium aconiatum Dietz, 1909 (Trematoda: Echinostomatidae) and their intermediate hosts. Khelmintologiya 16, 29-36.
Evans, N.A. (1982a) Effect of copper and zinc upon the survival and infectivity of Echinoparyphium recurvatum cercariae. Parasitology 85, 295-303.
Evans, N.A. (1982b) Effects of copper and zinc on the life cycle of Notocotylus attenuatus (Digenea: Notocotylidae). International Journal for Parasitology 12, 363-369.
Evans, N.A. & Gordon, D.M. (1983a) Experimental observations on the specificity of Echinoparyphium recurvatum toward second intermediate hosts. Zeitschrift fu¨ r Parasitenkunde 69, 217-222.
Evans, N.A. & Gordon, D.M. (1983b) Experimental studies on the transmission dynamics of the cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae). Parasitology 87, 167-174.
Evans, N.A., Whitfield, P.J. & Dobson, A.P. (1981) Parasite utilization of a host community: the distribution and occurrence of metacercarial cysts of Echinoparyphium recurvatum (Digenea: Echinostomatidae) in seven species of mollusc at Harting Pond, Sussex. Parasitology 83, 1-12.
Gomot, A. (1998) Toxic effects of cadmium on reproduction, development, and hatching in the freshwater snail Lymnaea stagnalis for water quality monitoring. Ecotoxicology and Environmental Safety 41, 288-297.
Hellawell, J.M. (1986) Biological indicators of freshwater pollution and environmental management. London, Elsevier Applied Science Publishers.
Holliman, R.B. & Esham, L.P. (1977) Toxicity of cadmium to Schistosoma mansoni cercariae: effects on vitality and developmental ability in white mice. Hydrobiologia 56, 81-88.
HMSO (1969) Fish toxicity tests. HMSO Leaflet, No. Dd. 139779 K36 12/69.
Kennedy, C.R. (1975) Ecological animal parasitology. 163 pp. London, Blackwell Scientific.
King, C.L. & Higashi, G.I. (1992) Schistosoma mansoni: silver ion (Ag+) stimulates and reversibly inhibits lipid-induced cercarial penetration. Experimental Parasitology75, 31-39.
Korner, M. & Haas, W. (1998) Chemo-orientation of echinostome cercariae towards their snail hosts: amino acids signal a low host-specificity. International Journal for Parasitology 28, 511-516.
McCarthy, A.M. (1990a) Speciation of echinostomes: evidence for the existence of two sympatric sibling species in the complex Echinoparyphium recurvatum (von Listow 1873) (Digenea: Echinostomatidae). Parasitology 101, 35-42.
McCarthy, A.M. (1990b) The influence of second intermediate host dispersion pattern upon the transmission of cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae). Parasitology 101, 43-47.
McCarthy, A.M. (1999a) The influence of second intermediate host species on the infectivity of metacercarial cysts of Echinoparyphium recurvatum. Journal of Helminthology 73, 143-145.
McCarthy, A.M. (1999b) The influence of temperature on the survival and infectivity of the cercariae of Echinoparyphium recurvatum (Digenea: Echinostomatidae). Parasitology 118, 383-388.
Morley, N.J., Crane, M. & Lewis, J.W. (2001a) Toxicity of cadmium and zinc to encystment and in vitro excystment of Parorchis acanthus (Digenea: Philophthalmidae). Parasitology 122, 75-79.
Morley, N.J., Crane, M. & Lewis, J.W. (2001b) Toxicity of cadmium and zinc to miracidia of Schistosoma mansoni. Parasitology 122, 81-85.
Nasir, P. (1984) British freshwater cercariae. Cumana, Venezuela, Universidad de Oriente Press.
Pechenik, J.A. & Fried, B. (1995) Effect of temperature on survival and infectivity of Echinostoma trivolvis cercariae: a test of the energy limitation hypothesis. Parasitology 111, 373-378.
Ravera, O. (1991) Influence of heavy metals on the reproduction and embryonic development of freshwater pulmonates (Gastropoda: Mollusca) and cladocerans (Crustacea: Arthropoda). Comparative Biochemistry and Physiology 100C, 215-219.
Vivian, C.M.G. & Massie, K.S. (1977) Trace metals in waters and sediments of the River Tawe, South Wales, in relation to local sources. Environmental Pollution 14, 47-61.