Taxonomy: Class Blastocystea
Animal: Blastocystis hominis 8 09a .jpg
Sites: Gut
Blastocystis hominis -amoeboid form (these forms inhabit the colon along with small avacuolar forms but may be overlooked because of their small size, 5 microns or because they degenerate after passage). Bt bacteria, L-lipid, Ly lysosome- like organelles, n crescentic condensed chromatin band in nucleus, Nu nucleus, Pd pseudopod. (EM by Deb Stenzel). Unless the specimen is examined fresh or fixed with PVA or formalin immediately on passing, the in vivo forms ( avacuolar, amoeboid and multi- vacuolar forms) will have deteriorated and only the CV or granular forms will be seen in wet preparations, cysts will be missed if a stained smear is not examined due to their small size - 5 microns - light microscopy being the usual way to examine faecal samples.

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