An HIV patient complains of visual disturbances. Fundal examination shows bilateral retinal exudates and perivascular hemorrhages. Which of the following viruses are most likely to be responsible for this retinitis?: (A) Herpes simplex, (B) Varicella zoster, (C) Cytomegalovirus, (D) EBV
Answer is C. Ans. is 'c' i.e., Cytomegalovirus (Ref: Harrison, 18th/e, p. 1563; 17th/e, p. 1185)* Perivascular hemorrhage and exudate are characteristic of CMV retinitis.* CMV infection - Other organ infection excluding liver, spleen and lymph nodes.* Other viral opportunistic infections - Chronic HSV infection, Progressive multifocal leukoencephalopathy, varicella-zoster virus, adenovirus, polyomavirus JC virus, hepatitis B virus, hepatitis C virus.