Enteromonas hominis 12 04.jpg

Taxonomy: f. Enteromonadidae
Animal: Enteromonas hominis 12 04.jpg
Sites: Gut
Comment:
Enteromonas hominis trophozoites 4 - 10 x 3 - 6 microns in faecal specimen (TEM). NB There were 3 anterior flagella and 1 posterior flagella extending free posteriorly or laterally, though not all visible in this photo. There is one nucleus but no cytostome or axostyle. They were from a specimen from a 50 year old female with 2 months history of diarrhoea following a trip to Africa. They were present in one of 4 stool samples presented over a 6 week period. Also present were Entamoeba coli trophozoites and cysts and Enteromonas cysts. No pathogenic organisms were isolated and the cause of her symptoms was not identified. These parasites are often not reported because of their small size and if not examined fresh within 30 minutes of collection or fixed fresh, they disintegrate and also because of the difficulties in identification under LM (see 1 02, 07, 23 and 24). They are considered non-pathogenic but are little studied. EM was performed on this specimen to assist in identification. (EM by Deb Stenzel)

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