Which method is most effective for diagnosing a primary herpes simplex infection?

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Smear stained using Giemsa techniqueSmear stained with Wright's stainFluorescent staining applied to cytology smearStandard cytological examination

Explanation

A smear stained with Giemsa or Wright's stain can be used, but the most reliable diagnostic approach for primary herpes simplex infection is fluorescent staining of the cytology smear, which enhances detection of viral cytopathic effects. Routine cytology is less specific.