Giardia
Protozoa flagellates, endemic in US among gay men
Reservoir host including aquatic mammals (i.e., water beavers). Longer association with organism than human (evolutionary adaptation with reservoir host). The more virulent an organism, the more recent the organism has developed in that species.
Cyst is infectious. When organism gets out of the hostādevelops into a cyst form that survives outside the host in food and waterāingestion of contaminated food and waterāGiardia gets into GI Tract
The site of infection is the small intestine, not colon
High rate of replication/multiplication profuselyāmillions of Giardia in small intestineāinfective dose is very high
Does not produce a toxin but because of high density, possess a disc in anterior part of organism for attachment. Attach to the surface epithelial cells of the villi of small intestineāmechanically block all the available surface of the villiāproduce different metabolic products including lipidsālipids releasedāinflammation and irritation of the surface epithelial cellsādiarrhea
Drug of choice metronidazole, flagel
where I found this info
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chickabowwow

3.2 leopard geckos (Rosie, Locke, Lisa, Caesar, Tommy)
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