Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/130986
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dc.titleIn vitro encystment and experimental infections of Blastocystis hominis
dc.contributor.authorSuresh, K.
dc.contributor.authorNg, G.C.
dc.contributor.authorRamachandran, N.P.
dc.contributor.authorHo, L.C.
dc.contributor.authorYap, E.H.
dc.contributor.authorSingh, M.
dc.date.accessioned2016-11-28T10:14:57Z
dc.date.available2016-11-28T10:14:57Z
dc.date.issued1993
dc.identifier.citationSuresh, K., Ng, G.C., Ramachandran, N.P., Ho, L.C., Yap, E.H., Singh, M. (1993). In vitro encystment and experimental infections of Blastocystis hominis. Parasitology Research 79 (6) : 456-460. ScholarBank@NUS Repository.
dc.identifier.issn00443255
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/130986
dc.description.abstractCultures of Blastocystis hominis were induced to encyst using three encystation media: (a) an encystation medium (EM) comprising yeast extract in buffered saline containing 50% horse serum, (b) an encystation medium (CEM) comprising EM conditioned with bacterial soluble products and (c) an encystation medium (TEM) containing 0.5% trypticase in EM. Two isolates of B. hominis were studied, an axenized isolate C and a non-axenized isolate MS. In EM, isolate C did not encyst, whereas 6.1% of isolate MS had encysted by day 1. However, in CEM and TEM, 17.4% and 25.7% of isolate C, respectively, had encysted by day 5. In all three media, isolate MS encysted more readily than isolate C, with as much as 91.7% of the former encysting in TEM. As viewed by phase-contrast microscopy, cyst-like stages appeared highly refractile. Direct stool examination of juvenile Wistar rats infected with 10000 cyst-like stages of both C and MS isolates showed Blastocystis at day 2 post-infection. At autopsy on day 7, large numbers of Blastocystis were seen in the cecum, with smaller numbers being observed in the large intestine. In contrast, rats fed with various inocula of the vacuolar stages of isolates C and MS did not become infected, indicating the importance of the encysted stages in the transmission of the parasite.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMICROBIOLOGY
dc.description.sourcetitleParasitology Research
dc.description.volume79
dc.description.issue6
dc.description.page456-460
dc.description.codenPARRE
dc.identifier.isiutNOT_IN_WOS
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