Saturday, September 20, 2014

Answer to Case 319

Answer:  Giardia duodenalis (a.k.a. G. lamblia, G. intestinalis) trophozoites.

This was a very impressive case given the large number of trophozoites present. Tomáš Macháček asked how often this number of trophozoites is 
found in stool compared with cysts. In my experience (and in the 
experience of the Florida Fan who donated this case), this amount 
of trophozoites is very uncommon - typically seen only in duodenal 

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