REFERENCES
- Ali, O. E. & Eissa, M. (1984). Observations on morbidity from schistosomiasis through a control program in Middle Egypt 1977–1981. Journal of the Egyptian Society of Parasitology, 14, 441–454.
- Armstrong, J. C. (1965). Mating behaviour and development of schistosomes in the mouse. Journal of Parasitology, 51, 605–616.
- Bell, E. J. & Smyth, J. D. (1958). Cytochemical and histochemical criteria for evaluation of development of trematodes and pseudophyllidean cestodes in vivo and in vitro. Parasitology, 48, 131–148.
- Bremond, P., Theron, A. & Rollinson, D. (1989). Hybrids between Schistosoma mansoni and S. rodhaini: characterization by isoelectric focusing of six enzymes. Parasitology Research, 76, 138–145.
- Dias Neto, E., Pereira de Souza, C., Rollinson, D., Katz, N., Pena, S. D. & Simpson, A. J. G. (1993). The random amplification of polymorphic DNA allows the identification of strains and species of schistosome. Molecular and Biochemical Parasitology, 57, 83–88.
- El-Alamy, M. A. & Cline, B. L. (1977). Prevalence and intensity of Schistosoma haematobium and S. mansoni infection in Qualyub, Egypt. American Journal of Tropical and Medical Hygiene, 26, 463–469.
- Fletcher, M., Lo Verde, P. T. & Woodruff, D. S. (1981). Genetic variation in Schistosoma mansoni enzyme polymorphisms in populations from Africa, South East Asia, South America and the West Indies. American Journal of Tropical Medicine and Hygiene, 30, 406–421.
- Gasser, R. B., Morahan, G. & Mitchell, G. F. (1991). Sexing single larval stages of Schistosoma mansoni by polymerase chain reaction. Molecular and Biochemical Parasitology, 47, 255–258.
- Laemmli, U. K. (1970). Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature, 277, 680–685.
- Le Blancq, S. M., Cibulskis, R. E. & Peters, W. (1986). Leishmania in the Old World: 5. Numerical analysis of isoenzyme data. Transactions of the Royal Society of Tropical Medicine and Hygiene, 80, 517–524.
- Liberatos, J. D. & Short, R. B. (1983). Identification of sex of schistosome larval stages. Journal of Parasitology, 69, 1084–1089.
- Mansour, N. S., Soliman, G. N. & El-Assal, F. M. (1984). Studies on experimental mixed infection of Schistosoma mansoni and S. haematobium in hamsters. Zeitschrift für Parasitenkunde, 70, 345–357.
- Short, R. B. (1948). Inter-generic crosses among schistosomes (Trematoda: Schistosomatidae). Journal of Parasitology, 34 (Suppl. 6), 30.
- Simpson, A. J. G., Dias Neto, E., Johnston, D. A., Kaukas, A. & Rollinson, D. (1993). Recent molecular approaches to the study of schistosome genetics. Experimental Parasitology, 77, 376–379.
- Soliman, G. N., El Assal, F. M., Mansour, N. S. & Garo, K. (1986). Comparison of two Egyptian strains of Schistosoma mansoni in hamsters. Zeitschrift für Parasitenkunde, 72, 353–363.
- Taylor, M. G. (1970). Hybridization experiments on five species of African schistosomes. Journal of Helminthology, 44, 253–314.
- Taylor, M. G., Amin, M. B. A. & Nelson, G. S. (1969). Parthenogenesis in Schistosoma mattheei. Journal of Helminthology, 43, 197–206.
- Taylor, M. G., Nelson, G. S., Smith, M. & Andrews, B. J. (1973). Comparison of the infectivity and pathogenicity of six species of African schistosomes and their hybrids. 2. Baboons. Journal of Helminthology, 47, 455–485. Vogel, H. (1941). Uber den einfluss des geschlechts partners auf wachstum und entwichlung bei Bilharzia mansoni und krewspaarungen zwichen verschniedenen Bilharzia-Arten. Zentrablatt für Bakteriologie Parasitenkunde und Infektionskrankheiten, (Abteilung 1, Originale), 149, 319–333.
- Wright, C. A. & Ross, G. C. (1980). Hybrids between Schistosoma haematobium and S. mattheei and their identification by isoelectric focusing of enzymes. Transactions of the Royal Society of Tropical Medicine and Hygiene, 74, 326–332.
- Wright, C. A. & Southgate, V. R. (1976). Hybridization of schistosomes and some of its implications. In Genetic Aspects of Host-Parasite Relationships, eds Taylor, A. E. R. & Muller, R. pp. 55–86. Oxford: Blackwell Scientific.
- Wright, C. A., Southgate, V. R. & Ross, G. C. (1979). Enzymes in Schistosoma intercalatum and the relative status of the lower Guinea and Zaire strains of the parasite. International Journal for Parasitology, 9, 523–528.
- Wu, G. Y., Wu, C. H., Dunn, M. A. & Kamel, R. (1985). Stimulation of Schistosoma mansoni opposition in vitro by animal and human portal serum. American Journal of Tropical Medicine and Hygiene, 34, 750–753.