Microbiology and Immunology 2500A/B Study Guide - Final Guide: Giardia Lamblia, Dientamoeba Fragilis, Stool Test
10 Sep 2020
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They are more hardy, and are usually the form that people are exposed to when they come in contact with food, water or bad hygienic practices: trophozoites are the active form. They are the form that causes bad things to happen in the body: diagnosis is still via a stool test for ova and parasites. 3-5 tests must be negative to rule out an infection: examination of stool is still being done manually, by visually examining the stool under a light microscope. It is a non-invasive disease (i. e. does not spread to other organs) that infects the duodenum. The cysts are very difficult to differentiate from the cysts of non-pathogenic protozoa: key to differentiation of the cysts is in the morphology of the nuclei. If the things in the cyst are evenly distributed, it is the cyst of. If infected with falciparum, we would consider that to be medical emergency in a non-immune host.
