Study of the morphological characteristics of Schistosoma mansoni in mice, squirrels, and hamsters.

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dc.contributor.authorFan, P Cen_US
dc.contributor.authorPao, K Yen_US
dc.date.accessioned2009-05-27T14:56:22Z
dc.date.available2009-05-27T14:56:22Z
dc.date.issued2006-01-15en_US
dc.descriptionThe Southeast Asian Journal of Tropical Medicine and Public Health.en_US
dc.description.abstractThis study attempted to describe mophological characteristics of S. mansoni worms. In the present study, 6 hamsters, 35 squirrels and 141 mice were infected with pooled cercariae of Schistosoma mansoni by intraperitoneal and percutaneous routes. The worm recovery rate was 18.2% (257/1,412) in hamsters (Mesocricetus auratus); 10.1% (3,310/32,792) in squirrels (Callosciurus erythraeus roberti) and 16.2% (4,328/26,720) in mice (Swiss strain). There were no significant differences between the sizes of 332 adults studied from three kinds of experimental animals. However, the worms collected from the hepatic portal system were usually larger than those from the peritoneal cavity because the latter almost always remained in the immature stage. We found male S. mansoni with tandem (17-22%), non-tandem (80-83%) and unusual/irregular arrangement (3-5%) of testes. The number of S. mansoni testes found were from 3 to 15 in mice, 3 to 11 in hamsters and 4 to 15 in squirrels. Mature worms had a tendency to reduce their size with aging. The number of S. mansoni cecal loops were from 1 to 5 in mice and hamsters and 1 to 4 in squirrels. The location of the first cecal loop was usually in the anterior part of body (1/4 in females and 1/3 in males), but there were some exceptions. The number of eggs in the uterus of each female worm, were 0-3 in mice, 0-1 in squirrels and hamsters. The average number was 0.75. The location of the ovary was usually situated in the anterior part of body of the worm in the three kinds of experimental animals. A few mated male and female worms of S. mansoni being free in the peritoneal cavity were found to develop to sexual maturity, because eggs were observed in their uteri. Their size was usually found to be considerably smaller than the worms seen in the hepatic portal system, and they had no hematin in their intestinal ceca. Encapsulated eggs were found from the peritoneal cavities of a few mice following intraperitoneal and percutaneous methods of infection.en_US
dc.description.affiliationParasitology Laboratory, Department of Medical Research, Veterans General Hospital, VACRS, Taipei, Taiwan, Republic of China. pcfan@mailsrv.ym.edu.twen_US
dc.identifier.citationFan PC, Pao KY. Study of the morphological characteristics of Schistosoma mansoni in mice, squirrels, and hamsters. The Southeast Asian Journal of Tropical Medicine and Public Health. 2006 Jan; 37(1): 33-9en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/31489
dc.language.isoengen_US
dc.source.urihttps://www.tm.mahidol.ac.th/seameo/2006_37_1/07-3579A.pdfen_US
dc.subject.meshAnimalsen_US
dc.subject.meshCricetinaeen_US
dc.subject.meshFemaleen_US
dc.subject.meshGonads --anatomy & histologyen_US
dc.subject.meshMaleen_US
dc.subject.meshMiceen_US
dc.subject.meshPeritoneal Cavity --parasitologyen_US
dc.subject.meshSchistosoma mansoni --anatomy & histologyen_US
dc.subject.meshSchistosomiasis mansoni --parasitologyen_US
dc.subject.meshSciuridaeen_US
dc.subject.meshSpecies Specificityen_US
dc.titleStudy of the morphological characteristics of Schistosoma mansoni in mice, squirrels, and hamsters.en_US
dc.typeJournal Articleen_US
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