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Method 1622/1623 Microscopy
Giardia & Cryptosporidium
Enumerating a Field/Environmental Slide
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The end result of Method 1622/1623 is the number of cysts/oocysts per volume of water processed through the method.

After conducting the appropriate examination of the positive control slide, the field slide is scanned following the correct procedure. The cysts and oocysts counted must meet the criteria for Giardia and Cryptosporidium stated in the Method.

Each organism is described, measured and recorded on the examination results form. If the organism does not meet the definition, the reason is stated.

Play the video to begin a trial count of 2 rows.

animate 2 rows of counting, locate Nancy Hall’s microscope SOP, write a more formal SOP??