Skip to main content Accessibility help

Parasites in Bulinus senegalensis (Mollusca: Planorbidae)and their detection

  • C. A. Wright (a1), D. Rollinson (a1) and P. H. Goll (a2)


Isoelectric focusing studies on enzyme variation between populations of the snail Bulinus senegalensis revealed that parasitic infections in the snails contributed additional bands of enzyme activity, particularly in the glucose phosphate isomerase (GPI) and malate dehydrogenase (MDH) systems. The patterns due to the parasite enzymes were, in most cases, clearly distinct from those of the host and different from each other. Parasites encountered included Schistosoma haematobium, S. bovis, Paramphistomum microbothrium, another amphistome probably belonging to the group which infect amphibians, Echinostoma revolutum, another echinostome (probably Echinoparyphium sp.), strigeids, xiphidiocercariae (these were resolved into 3 distinct types by the enzyme data) and ciliate protozoa. The 7 host populations which were examined showed marked differences in both the prevalence and variety of their parasitic infections and these variations were tentatively related to environmental differences in their respective habitats and to the nature of human contact patterns. Seasonal changes in the parasite fauna were also noted and some of the implications of the parasite load on the host population are briefly mentioned.



Hide All
Adanson, M. (1757). Coquillages Histoire naturelle de Senegal. Paris: Claude-Jean Baptiste Bauche.
Bisseru, B. (1967). Stages in the development of larval echinostomes recovered from schistosome transmitting molluscs in Central Africa. Journal of Helminthology 41, 89108.
Dinnik, J. A. (1961). Paramphistomum phillerouxi sp. nov. (Trematoda: Paramphistomatidae) and its development in Bulinus forskali. Journal of Helminthology 35, 6990.
Dinnik, J. A. (1964). Intestinal paramphistomiasis and Paramphistomum microbothrium Fischoeder in Africa. Bulletin of epizootic Diseases in Africa 12, 439–54.
Dinnik, J. A. (1965). The snail hosts of certain Paramphistomatidae and Gastrothylacidae (Trematoda) discovered by the late Dr P. L. Le Roux in Africa. Journal of Helminthology 39, 141–50.
Dinnik, J. A. & Dinnik, N. N. (1954). The life-cycle of Paramphistomum microbothrium Fischoeder, 1901 (Trematoda, Paramphistomatidae). Parasitology 44, 285–99.
Etges, F. J. & Gresso, W. (1965). Effect of Schistosoma mansoni infection upon fecundity in Australorbis glabratus Journal of Parasitology 51, 757–60.
Lo, C. T. (1972). Compatibility and host–parasite relationships between species of the genus Bulinus (Basommatophora: Planorbidae) and an Egyptian strain of Schistosoma haematobium (Trematoda: Digenea) Malacologia 11, 225–80
Morel, G. & Roux, F. (1966). Les migrateurs palaerctiques au Senegal. 1. Non passereaux. La Terre et la Vie 1, 1972.
Ryšavý, B., Ergens, R., Groschaft, F., Moravec, F., Yousif, F. & El Hassan, A. A. (1973). Preliminary report on the possibility of utilizing competition of larval schistosomes and other larval trematodes in the intermediate hosts for the biological control of schistosomiasis. Folia Parasitologica (Praha) 20, 293–6.
Ryšavý, B., Moravec, F., Barus, V. & Yousif, F. (1974). Some helminths of Bulinus truncatus and Biomphalaria alexandrina from the irrigation system near Cairo. Folia Parasitologica (Praha) 21, 97105.
Smithers, S. R. (1956). On the ecology of schistosome vectors in the Gambia, with evidence of their role in transmission. Transactions of the Royal Society of Tropical Medicine and Hygiene 50, 354–65.
Wium-Andersen, G. & Simonsen, V. (1974). Phosphoglucoseisomerases in the sporocyst of the trematode Schistosoma mansoni and its intermediate host Biomphalaria alexandrina (Pulmonata). Parasitology 68, 189–92.
Wright, C. A. (1959). A note on the distribution of Bulinus senegalensis. West African Medical Journal 8, 142–8.
Wright, C. A. (1961). Taxonomic problems in the molluscan genus Bulinus. Transactions of the Royal Society of Tropical Medicine and Hygiene 55, 225–31.
Wright, C. A. (1971). Bulinus on Aldabra and the subfamily Bulininae in the Indian Ocean area. Philosophical Transactions of the Royal Society of London, B 260, 299313.
Wright, C. A. & Rollinson, D. (1979). Analysis of enzymes in the Bulinus africanus group (Mollusca: Planorbidae) by isoelectric focusing. Journal of Natural History (in the Press).
Wright, C. A. & Ross, G. C. (1966). Electrophoretic studies on planorbid egg-proteins. The Bulinus africanus and B. forskali species groups. Bulletin of the World Health Organization 35, 727–31.

Parasites in Bulinus senegalensis (Mollusca: Planorbidae)and their detection

  • C. A. Wright (a1), D. Rollinson (a1) and P. H. Goll (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed