Skip to main content
×
Home
    • Aa
    • Aa

Competitive exclusion in human schistosomes: the restricted distribution of Schistosoma intercalatum

  • L. A. Tchuem Tchuenté (a1) (a2) (a3), S. Morand (a1), D. Imbert-Establet (a1), B. Delay (a4) and J. Jourdane (a1)...
Abstract
SUMMARY

A study on the immune and mating interactions between Schistosoma intercalatum and S. mansoni has been carried out. The immunologically mediated interactions and mating patterns observed between the two species demonstrate that S. mansoni is competitively dominant over S. intercalatum. When S. mansoni females are absent, S. mansoni males are more competitive than S. intercalatum males at pairing with S. intercalatum females. The use of a mathematical model shows how the abundance of S. mansoni worms per host could dramatically affect the mating probability of S. intercalatum females with their homologous males. It appears that the competitive exclusion between these two species of schistosomes may probably be an important factor restricting the distribution of S. intercalatum in Africa.

Copyright
Corresponding author
*Corresponding author. Laboratoire de Biologie Animale, Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, Avenue de Villeneuve, 66860 Perpignan Cedex, France. Tel: +33 68 66 21 82. Fax: + 33 68 66 22 81. E-mail: jourdane@univ-perp.fr.
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

A. M. Agnew , H. M. Murare & M. J. Doenhoff (1989). Specific cross-protection between Schistosoma bovis and S. haematobium induced by highly irradiated infections in mice. Parasite Immunology 11, 341349.

F. O. I. Arène , E. T. Ukeibo & E. A. Nwawze (1989). Studies on Schistosomatidae in the Nigeria Delta: Schistosoma intercalatum in the Urban city of Port Harcourt, Nigeria. Public Health 103, 295301.

D. S. Brown , C. Sarfati , V. R. Southgate , G. C. Ross & R. J. Knowles (1984). Observations on Schistosoma intercalatum in southeast Gabon. Zeitschrift für Parasitenkunde 70, 243253.

R. T. Damian & R. W. Chapman (1983). The fecundity of Schistosoma haematobium in baboons, with evidence for a sex ratio effect. Journal of Parasitology 69, 987989.

D. A. Dean (1983). Schistosoma and related genera: acquired resistance in mice. Experimental Parasitology 55, 1104.

L. K. Eveland , S. Y. L. Hsu & H. F. Hsu (1969). Cross-immunity of Schistosoma japonicum, S. mansoni and S. bovis in rhesus monkeys. Journal of Parasitology 55, 279288.

D. Imbert-Establet , M. Y. Xia & J. Jourdane (1994). Parthenogenesis in the genus Schistosoma: electrophoretic evidence for this reproduction system in S. japonicum and S. mansoni. Parasitology Research 80, 186191.

J. Jourdane & A. Théron (1980). Schistosoma mansoni: Cloning by microsurgical transplantation of sporocysts. Experimental Parasitology 50, 349357.

J. D. Liberatos (1987). Schistosoma mansoni: male-biased sex ratios in snails and mice. Experimental Parasitology 64, 165177.

N. A. Moloney , E. G. Garcia & G. Webbe (1985). The strain specificity of vaccination with ultra-violet attenuated cercariae of the Chinese strain of Schistosoma japonicum. Transactions of the Royal Society of Tropical Medicine and Hygiene 79, 245247.

S. Morand , J. P. Pointier , G. Borel & A. Théron (1993). Pairing probability of schistosomes related to their distribution among the host population. Ecology 74, 24442449.

S. Navarrete , D. Rollinson & A. M. Agnew (1994). Cross-protection between species of the Schistosoma haematobium group induced by vaccination with irradiated parasites. Parasite Immunology 16, 1925.

F. J. Pitchford (1961). Observations on a possible hybrid between the two schistosomes S. haematobium and S. mattheei. Transactions of the Royal Society of Tropical Medicine and Hygiene 55, 4451.

D. Rollinson , V. R. Southgate , J. Vercruysse & P. J. Moore (1990). Observations on natural and experimental interactions between Schistosoma bovis and S. curassoni from West Africa. Acta Tropica 47, 101114.

M. A. Smith , J. A. Clegg & G. Webbe (1976). Cross-immunity to Schistosoma mansoni in the hamster. Parasitology 73, 5364.

V. R. Southgate (1978). On factors possibly restricting the distribution of Schistosoma intercalatum, Fisher 1934. Zeitschrift für Parasitenkunde 56, 183193.

V. R. Southgate , D. Rollinson , G. C. Ross & R. J. Knowles (1982). Mating behaviour in mixed infections of Schistosoma haematobium and S. intercalatum. Journal of Natural History 16, 491496.

V. R. Southgate , D. Rollinson , A. Kaukas , J. Almeda , A. M. Sousa , F. Castro , E. Scares & M. Corachan (1994). Schistosomiasis in the Republic of Sáo Tomé and Principe: characterization of Schistosoma intercalatum. Transactions of the Royal Society of Tropical Medicine and Hygiene 88, 479486.

G. Webbe , E. R. James , G. S. Nelson , M. M. Ismail & J. R. Shaw (1979). Cross resistance between Schistosoma haematobium and S. mansoni in the baboon. Transactions of the Royal Society of Tropical Medicine and Hygiene 73, 42.

C. A. Wright , V. R. Southgate & R. J. Knowles (1972). What is Schistosoma intercalatum Fisher, 1934? Transactions of the Royal Society of Tropical Medicine and Hygiene 66, 2864.

C. A. Wright , V. R. Southgate & G. C. Ross (1979). Enzymes in Schistosoma intercalatum and the relative status of the Lower Guinea and Zaire strains of the parasite. International Journal for Parasitology 9, 523528.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Parasitology
  • ISSN: 0031-1820
  • EISSN: 1469-8161
  • URL: /core/journals/parasitology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: