<prompt> Which is the most common oppounistic retinal infection associated with HIVCMV retinitisVZVSyphilictic retinitisHerpes simplex  <response>: Cytomegalovirus CMV retinitis is a sight-threatening disease associated with AIDS acquired immune deficiency syndrome -- a serious disease of the immune system caused by infection with HIV human immunodeficiency virus. In the past, about a quaer of active AIDS patients developed CMV retinitis. Ref ananthnarayana and panikers microbiology textbook 8e 