Proper identification is imperative for accurate and precise enumeration.
- Brilliant apple-green color
- Brightly highlighted rim
- Fluorescence - crisp and sharp
- Fluorescence - consistent width
- No openings or breaks in fluorescence
- Entire surface of oocyst is not fluorescing
- No scattering of fluorescence when focusing
- Only one fluorescing rim is observed
- Suture line may be present
- Shape – spherical to ovoid
Record observations on the Cryptosporidium Examination Results Form.
Tricks and Tips
photo will be a “perfectly” fluorescing Cryptosporidium oocyst that the viewer can focus in and out using the scroll bar at the bottom of the photo, have arrows on this photo pointing to edge