Studies on experimental mixed infections of Schistosoma mansoni and S. haematobium in hamsters.
Golden hamsters were superinfected simultaneously with 100 Schistosoma haematobium cercariae, 1 and 3 weeks after initial infection with 100 S. mansoni cercariae. Results indicate that there was a higher degree of resistance to superinfection with S. haematobium at 1 week following initial infection with S. mansoni than that produced in the other two superinfections. This resistance was evidenced by a reduction in the number and size of worms of both species, decrease in S. haematobium egg extrusion per female and by a striking deviation in the egg distribution pattern of both species. Such an early host resistance was not recorded in previous works. Cross-mating was observed but no hybridization took place and the eggs produced were hatchable and typical of their species.
D000818:Animals; D006224:Cricetinae; D005243:Feces / Q000469:parasitology; D005260:Female; D008297:Male; D008647:Mesocricetus; D010270:Parasite Egg Count; D012548:Schistosoma haematobium / Q000033:anatomy & histology / Q000254:growth & development* / Q000276:immunology; D012550:Schistosoma mansoni / Q000033:anatomy & histology / Q000254:growth & development* / Q000276:immunology; D012552:Schistosomiasis / Q000276:immunology / Q000401:mortality / Q000469:parasitology*