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Host-parasite Relationships of Bulinus globosus and B. truncatus with Strains of Schistosoma haematobiutm

Published online by Cambridge University Press:  18 November 2009

G. Webbe  and
C. James
G. Webbe
Affiliation:
London School of Hygiene and Tropical Medicine
C. James
Affiliation:
London School of Hygiene and Tropical Medicine
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Extract

It is apparent that under the conditions of the observations recorded in this study the host-parasite relationships of the two species of snails and their respective strains of S. haematobium exhibit marked similarity in certain respects but differ in others. Higher cercarial infection rates were obtained in B. globosus than in B. truncalus at relatively low miracidial exposure levels but the daily mean cercarial outputs of each species at the same miracidial exposure level were similar. A higher frequency of production of large numbers of cercariae was recorded for infividual B. globosus than for B. truncatus. The mean cercarial prepatent periods for B. globosus and B. truncatus at a level of 7 miracidia were each 32 days, but infected B. globosus lived appreciably longer than infected B. truncatus. The hourly output of both species exposed to stimuli for the same period of time was broadly similar. Peaks of cercarial production were generally reached earlier by individual B. truncatus (2 weeks) after onset of shedding than by individual B. globosus (4–5 weeks), although erratic shedding was observed for both species.

Type
Research Article
Information
Journal of Helminthology , Volume 46 , Issue 2 , June 1972 , pp. 185 - 199
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Chu, K. Y., Massoud, J. and Sabbaghian, H., 1966a.—“Host-parasite relationship of Bulinus truncahts and Schistosoma haematobium in Iran. I. Effect of the age of B. truncatus on the development of S. haematobium.” Bull. WldHllh Org., 34, 113–119.Google Scholar
Chu, K. Y., Sabbaghian, H. and Massoud, J., 1966b.—“Host-parasite relationship of Bulinus truncatus and Schistosoma haematobium in Iran. 2. Effect of exposure dosage of miracidia on the biology of the snail host and the development of the parasites.” Bull. WldHllh Org., 34, 121–130.Google Scholar
Chu, K. Y., Massoud, J. and Arfaa, F., 1968.—“Distribution and ecology of Bulinus truncatus in Khuzestan, Iran.” Bull. WldHllh Org., 39, 607–637.Google ScholarPubMed
Gordon, R. M., Davey, T. H. and Peaston, H., 1934.—“The transmission of human bilharziasis in Sierra Leone, with an account of the life-cycle of the schistosomes concerned, S. mansoni and S. haematobium.” Ann. trop. Med. Parasit., 28, 323–418.Google Scholar
Hira, P. R. and Muller, R., 1906.—“Studies on the ecology of snails transmitting urinary schistosomiasis in Western Nigeria.” Ann. trop.Med. Parasit., 60, 198–211.Google Scholar
Kendall, S. B., 1949.—“Nutritional factors affecting the rate of development of Fasciola hepatica in Limnaea truncatula.” J. Helminth., 23, 179–190.Google Scholar
Mcclelland, W. F. J., 1905a.—“Individual and mass exposures of Bulinus nasutus to Schistosoma haematobium and Biomphalaria sudanica to S. mansoni, and the effects of concentration of miracidia on infection rates.” Proc. Centr. Afr. Sci. and Med. Congr., Lusaka, 1963, Pergamon: London, pp. 819–827.Google Scholar
Mcclelland, W. F. J., 1965b.—“The production of cercariae by Schistosoma mansoni and 5. haematobium and methods for estimating the numbers of cercariae in suspension.” Bull. Wld Hlth Org., 33, 270–276.Google Scholar
Mcclelland, W. F. J., 1967.—“Production of Schistosoma haematobium and Schistosoma mansoni cercariae in Tanzania.” Expl Parasit., 20, 205–218.Google Scholar
Pesigan, T. P.. Hairston, N. G., Jauregui, J. J., Garcia, E. G., Santos, A. T., Santos, B. C. and Besa, A. A., 1958.—“Studies on Schistosoma japonicum infection in the Philippines. II. The molluscan host. Bull. Wld Hlth Org., 18, 481–578.Google Scholar
Pitchford, R. J. and Visser, P. S., 1965.—“Some further observations on schistosome transmission in the Eastern Transvaal.” Bull. Wld Hlth Org., 32, 83–104.Google Scholar
Porter, A., 1920.—“The experimental determination of the vertebrate hosts of some South African cercariae from the molluscs Physopsis africana and Limnaea natalensis.” Med. J. S. Afr., 15, 128–133.Google Scholar
Sturrock, B. M., 1967.—“The effect of infection with Schistosoma haematobium on the growth and reproduction rates of Bulinus (Phyopsis) nasutus productus.” Ann. trop. Med. Parasit., 61, 321–325.Google Scholar
Teesdale, C., 1962.—“Ecological observations on the molluscs of significance in the transmission of bilharziasis in Kenya.” Bull. Wld Hlth Org., 27, 759–782.Google Scholar
Webbe, G., 1966.—“The effect of water velocities on the infection of animals exposed to Schistosoma mansotti cercariae.” Ann. trop. Med. Parasit., 60, 78–84.Google Scholar
Webbe, G., AND James, C., 1971a.—“A comparison of two geographical strains of Schistosoma haematobium.” J. Helminth., 45, 271–284.Google Scholar
Webbe, G., AND James, C., 1971b.—“The importation and maintenance of schisto somes of human and veterinary importance.” In Ninth Symposium of the British Society for Parasitology ed. Taylor, A. E. R. pp. 77–107, Blackwell Scientific Publications: Oxford.Google Scholar
Webbe, G., AND James, C., 1971c.—“Infra-specific variations of Schistosoma haematobium.” J. Helminth, 45, 403–413.Google Scholar