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Sodium Nitrate solution (NaNO3) pro's
Floats Trematodes
Efficient in floating ova <20mm
Sodium Nitrate solution (NaNO3) con's
Can be expensive
Forms crystals and air bubbles
Can distort ova >20mm
Floats debris
Zinc Sulfate solution (ZnSO4) pro's
Least distortion for protozoa
Zinc Sulfate solution (ZnSO4) con's
Distorts helminthes
Sugar Solution pro's
Does not distort helminthes
Does not crystallize
Inexpensive
Long shelf life
Sugar Solution con's
Sticky
Attracts bugs
Ova rise slowly
Distorts fragile larvae, trematodes, cysts
OVASSAY Plus uses this solution
Zinc Sulfate
Fecalyzer uses this solution
Sodium Nitrate
Sodium Nitrate is commercially available as this solution
Fecasol
Sugar Solution is commercially available as this solution
Sheather's
Best fecal method
Fecal centrifugation
Fecal method used only for larval stages of parasites
Baermann Technique