A 25-year-old HIV-infected man presents to your office with severe herpes proctitis. The patient has been treated with acyclovir, 200 mg five times daily for six weeks without improvement in the lesions. On repeat culture of the rectum, herpes simplex virus 2 is again isolated and further testing reveals that this is a thymidine kinase- deficient strain. Which is the preferred treatment option for this condition?a. Foscarnetb. Vidarabinec. Ganciclovird. Valacyclovire. Famciclovir

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