Immunofluorescence image of several
Cryptosporidium parvum oocysts. Oocysts were stained with commercially available immunofluorescent antibodies. Oocysts should have an intense apple green fluorescence on the periphery of their oocyst wall, and measure 4 to 6 microns in diameter. Scale bar is 10 microns.
Photo Credit: H.D.A. Lindquist, U.S. EPA
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