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. 1998 Apr;42(4):868-72.
doi: 10.1128/AAC.42.4.868.

Survey of resistance of herpes simplex virus to acyclovir in northwest England

Affiliations

Survey of resistance of herpes simplex virus to acyclovir in northwest England

J Christophers et al. Antimicrob Agents Chemother. 1998 Apr.

Abstract

Acyclovir (ACV) has been used for more than 15 years in the management of herpes simplex virus (HSV) and varicella-zoster virus (VZV) disease. The present survey was undertaken to assess the level of ACV resistance in the population. More than 2,000 HSV isolates from both immunocompetent and immunocompromised patients in northwest England were collected over a 2-year period and tested for sensitivity to ACV. These studies suggested a prevalence of resistance of approximately 0.1 to 0.6% in immunocompetent individuals, with no apparent difference in prevalence between treated and untreated groups. In line with previous studies, the prevalence of resistance in treated immunocompromised individuals was approximately 6%.

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Figures

FIG. 1
FIG. 1
Characterization of resistant isolates of HSV. Resistant viruses were classified phenotypically by the illustrated protocol.
FIG. 2
FIG. 2
Sensitivity distribution of 2,012 HSV isolates tested by a primary assay for sensitivity to ACV. The ACV treatment history and immunologic status (N, normal; IC, immunocompromised) are also indicated.

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