Abstract
In human infection withSchistosoma mansoni from Beni-Suef, the eggs were encountered more frequently in the urine of patients than in infection withS. mansoni from Giza, where eggs were passed into the stool. A comparative study of the two strains ofS. mansoni from Beni-Suef and Giza has been carried out in golden hamster. Consistent strain differences were observed. The Beni-Suef strain proved to have lower worm recovery and different egg distribution patterns in tissues of infected hamsters. Worms of both sexes of this strain were larger in size and required a longer period to reach maturity. Hence, the prepatent period was prolonged. Significant differences between the two strains were also noted in the number of eggs per worm. A lower mortality rate and a longer survival time were encountered in hamsters infected with the Beni-Suef strain.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Abdel Wahab MF (1982) Schistosomiasis in Egypt. CRC Press Inc Boca Raton Florida, pp 21–165
Ali OF, Eissa M (1984) Observations on morbidity from schistosomiasis through a control program in Middle Egypt. J Egypt Soc Parasitol 14 (2):441
Belding DL (1965) The blood flukes of man. Textbook of parasitology. 3rd ed. Appletion-Century Crofts New York, pp 739–795
Coles GC, Thurston JP (1970) Testes number in East AfricanSchistosoma mansoni. J Helminthol 44(1):69–73
El Assal FM (1981) Comparative biological and biochemical studies on the Egyptian human blood flukes,Schistosoma mansoni andS. haematobium and a rodent strain ofS. mansoni. Ph D Thesis Fac Sci Cairo Univ
Halawani AA, Farag HF, Awadalla HN (1977) Studies on experimental mixed infection ofSchistosoma haematobium andS. mansoni in the albino mouse. Tropenmed Parasit 28:478–480
Hsu HF, Hsu SY Li (1957) On the infra-specific and inter-strain variations of male sexual glands ofSchistosoma japonicum. J Parasitol 43:457–463
Hsu HF, Hsu SY Li (1960) On the virulence of the geographical strains ofSchistosoma japonicum. Am J Trop Med Hyg 9:195–198
Hussein M (1972) Unpublished mimeograph of health manpower. High Inst Publ Hlth Univ Alex Egypt
Jaffe R, Mayer M, Pifano CF (1945) Quoted from Saoud MFA 1966a. The infectivity and pathogenecity of geographical strains ofSchistosoma mansoni. Trans R Soc Trop Med Hyg 60(5):585–560
James C, Webbe G (1973) A comparison of Egyptian and East African strains ofSchistosoma haematobium. J Helminthol 47:49–59
Koura M (1971) The relation between egg production and worm burden in experimental schistosomiasis II Duration of infection. J Egypt Med Assoc 54:446–450
Le Roux PL (1953) Specimens from a fatal case of schistosomiasis haematobia in white mouse. Trans R Soc Trop Med Hyg 47:264
Mansour NS, Soliman GN, El Assal FM (1984) Studies on experimental mixed infection ofSchistosoma mansoni andS. haematobium in hamsters. Z Parasitenkd 70:345–458
Miller P, Wilson RA (1980) Migration of the schistosomula ofSchistosoma mansoni from the lungs to the hepatic portal system. Parasitology 80:267–288
Pitchford RJ (1961) Observation on a possible hybrid between the two schistosomes,Schistosoma haematobium andS. matthei. Trans R Soc Trop Med Hyg 55(1):44–51
Porter A (1938) The larval trematoda found in certain South African Mollusca with special reference to schistosomiasis bilharziasis. Publ Afr Inst Med Res 8:1–492
Romanes GJ (1977) Cunningham's manual of practical anatomy. Vol 2: Thorax and abdomen. Oxford University Press, Oxford, p 126
Saoud MFA (1966a) The infectivity and pathogenecity of geographical strains ofSchistosoma mansoni. Trans R Soc Trop Med Hyg 60(5):585–600
Saoud MFA (1966b) On the infraspecific variation of the male sexual glands ofSchistosoma mansoni. J Helminthol XL (314):385–394
Scott JA (1937) The incidence and distribution of the human schistosomes in Egypt. Am J Trop Med Hyg 25:566–614
Sher FA, Machenzie P, Smithers SR (1974) Decreased recovery of invading parasites from the lungs as a parameter of acquired immunity to schistosomiasis in laboratory mouse. J Infect Dis 130:626–633
Webbe G, James C (1971) A comparison of two geographical strains ofSchistosoma haematobium. J Helminthol 45(2/3):271–284
WHO Bull (1974) Immunology of schistosomiasis (Memoranda) 51:553
Wright WH (1973) Geographical distribution of schistosomiasis and their intermediate host. In: Ansari N (ed) Epidemiology and control of schistosomiasis (Bilharziasis). B1-9 Baltimore Univ Park Press, Baltimore, p 42
Author information
Authors and Affiliations
Additional information
This work was supported by the Naval Medical Research and Development Command, NMC, NCR, Bethesda, MD. Work Unit No. 3M161102BS10.AA421
Rights and permissions
About this article
Cite this article
Soliman, G.N., El Assal, F.M., Mansour, N.S. et al. Comparison of two egyptian strains ofSchistosoma mansoni in hamsters. Z. Parasitenkd. 72, 353–363 (1986). https://doi.org/10.1007/BF00928746
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00928746