AIM: Recent phylogenetic analyses on the herpes simplex virus type 1 (HSV-1) genes US4, encoding glycoprotein G (gG) and US7, encoding gI, of clinical HSV-1 isolates have led to the classification of HSV-1 into three genotypes, arbitrarily designated as A, B and C. The prevalence of the HSV-1 gG and gI genotypes and their potential disease association was determined in a large cohort of patients with herpetic keratitis (HK).
METHODS: Primary corneal HSV-1 isolates of 178 HK patients were genotyped by a PCR-based restriction fragment length polymorphism method targeting the viral genes US4 and US7.
RESULTS: Genotype B was more frequently expressed by the corneal HSV-1 isolates compared with genotypes A and C. Fifty-five of 178 corneal isolates (31%) had different genotypes in both loci. No clinically relevant associations were observed between the HSV-1 genotypes and disease outcome in the HK patients studied.
CONCLUSIONS: The data presented demonstrate a high frequency of recombinant corneal HSV-1 isolates and suggest that clinical outcome of HSV-1-induced keratitis is independent of a gG or gI genotype.
|Number of pages||6|
|Journal||British Journal of Ophthalmology|
|Publication status||Published - Sept 2008|
- Cohort Studies
- DNA, Viral/genetics
- Herpesvirus 1, Human/classification
- Keratitis, Herpetic/virology
- Middle Aged
- Polymorphism, Restriction Fragment Length
- Viral Envelope Proteins/analysis