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  • Title: Study of a polymerase chain reaction-based method for detection of herpes simplex virus type 1 DNA among Iranian patients with ocular herpetic keratitis infection.
    Author: Khodadoost MA, Sabahi F, Behroz MJ, Roustai MH, Saderi H, Amini-Bavil-Olyaee S, Arzenani MK.
    Journal: Jpn J Ophthalmol; 2004; 48(4):328-32. PubMed ID: 15295656.
    Abstract:
    PURPOSE: To study the presence of the herpes simplex virus type 1 (HSV-1) glycoprotein D gene in tear films of Iranian patients with herpetic keratitis. METHODS: Twenty-five tear film and eye swab specimens from 25 herpetic keratitis patients and 10 specimens from 10 healthy volunteers were collected in the Farabi Eye Hospital, Tehran, Iran. HSV-1 DNA was detected by using the nested polymerase chain reaction (nPCR) method. Viral isolation was done using conventional viral techniques. A monoclonal antibody-based enzyme-linked immunosorbent assay (ELISA) was used for confirmation of positive cytopathic effect cell culture. The results of a diagnosis by an ophthalmologist team were compared with those of nPCR. RESULTS: HSV-1 DNA was identified in tear films of 88% (23/25) of suspected herpetic keratitis patients. All healthy controls (100%) had negative PCR results. HSV-1 was isolated in cell culture and confirmed by ELISA in 12% (3/25) of herpetic keratitis patients who had epithelial keratitis. The kappa value showed a high level of agreement between ophthalmologist team diagnosis and the PCR results (kappa = 0.86, P < 0.0001). CONCLUSIONS: nPCR is a sensitive, rapid, and powerful tool for detection of HSV-1 DNA in tear films of ocular herpetic keratitis patients and can serve as a supplemental method for diagnosis of herpetic keratitis infection.
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