Herpes zoster ophthalmicus and HIV infection in Nigeria.

Eight patients, 3 men and 5 women, aged between 24 and 40 years who had herpes zoster ophthalmicus (HZO) were seen in the Eye Department of the University of Nigeria Teaching Hospital, Enugu between 1994 and 1997. One of the patients was already on treatment for active pulmonary tuberculosis at the time he was first seen. All had skin eruptions at different stages of development in the area of distribution of the first trigeminal nerve on the affected side of the face and head. Ocular examination revealed impaired vision in the affected eye (between 6/12 and hand movement) in all the patients. All had lid oedema while 5 had ptosis (3 partial and 2 complete). Various degrees of conjunctival injection were observed in all patients while 6 of them had corneal anaesthesia and keratitis. Uveal inflammation, present in all the patients varied from mild iritis in 4 individuals to severe iridocyclitis in the remaining 4. Pupils reacted to light sluggishly in 2 patients while they were dilated and fixed in 3 others. None had any associated abnormalities in the posterior segment. Six of the patients consented and were screened for human immunodeficiency virus (HIV) infection. Of these, 4, including the patient with pulmonary tuberculosis, tested seropositive while 2 were seronegative. All 8 were treated with topical acyclovir. This was combined with oral acyclovir in one of the patients. Follow-up period was between 2 and 52 weeks. During this period skin eruptions and anterior segment signs improved in 5 patients while remaining stable in 3 others; post-herpetic neuralgia persisted on the affected side in 4 patients. Patients who were HIV seropositive did not recover as quickly or to the same extent as the seronegative ones. It is concluded that HZO infection may indicate underlying HIV infection in young Africans as has been found in whites.