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Agarose gel electrophoresis of the PCR products from corneal scratches for Acanthamoeba (a), HSV, VZV, and CMV (b). Agarose gel electrophoresis of PCR products of VZV in the tear fluid (c). VZV DNA was detected in both eyes before acyclovir treatment and it was not detected in the left eye with VZV keratitis after acyclovir treatment; however, it was still detected in the untreated healthy right eye.
