<prompt> An HIV patient complains of visual disturbances. Fundal examination shows bilateral retinal exudates and perivascular haemorrhages. Which of the following viruses are most likely to be responsible for this retinitis-Herpes simplexVaricella zosterCytomegalovirusEBV  <response>: This is a typical feature of Cytomegalovirus CMV retinitis. Pizza pie appearance of fundus in CMV retinitis.In HIV ve patient, if CD4 count is 50 cells microlitre Herpes simplex- type 1 : conjuctivitis and corneal ulceration. Varicella zoster-corneal ulcer and zoster opthalmicus. EBV- not associated with retinitis. 