Method 1623
Giardia & Cryptosporidium
Knowledge Review
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Is it Cryptosporidium?

Check the characteristics observed in the photos which support why you think the organism is or is not Cryptosporidium. Once you have decided, check the Yes or No box below. (FITC and DIC photographs represent the same organism)

1. Atypical internal morphology on DIC
2. One sporozoite
3. Three sporozoites
4. Amorphous internal structure
5. Cell wall observable on DIC
6. Atypical fluorescent pattern
7. Fluorescence is crisp and sharp
8. Brilliant apple-green fluorescence
9. Atypical shape
10. Correct shape

Yes, it is Cryptosporidium.
No, it is not Cryptosporidium.

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