During the course of infection, giardia will pass through many different anatomical locations. each of these locations is associated with specific events in giardia intestinalis pathogenesis. each statement below describes a key pathogenic event, sort the events by placing them in the bin that describes the anatomical location in which they occur place each event into the bin that describes the anatomical location where it occurs view available hint(s) reset trophozoites emerge nhozoits adbere viaexcystment trophozoites and cysts are expelled ventral disc ingestion of cysts rophozoites reproduce encystment occurs colon rectum (feces) mouth lumen of small intestine epithelial lining of intestine

during the course of infection the parasite, Giardia lamblia, pass through many anatomical locations to achieve its pathogenic effects which occurs in one host.

Explanation: infective form of the parasite is the mature cyst. Infection is acquired through ingestion of cysts in contaminated water or food. From the mouth the cyst passes down to the duodenum where it undergoes excystation. The cyst hatches out two trophozoites. By means of concavity on its ventral surface the trophozoites attaches to the epithelial lining of the small intestines. Encrustation occurs commonly in transit down the colon. Trophozoites retract the flagella into the axonemes, the cytoplasm becomes condensed and a thin tough hyaline cyst wall is secreted. As the cyst matures, the internal structures are doubled, so that when excystation occurs, the cytoplasm divides thus reproducing two trophozoites. Trophozoites are expelled through the anus with diarrhoeal stools.

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