due to similarities between human immunodeficiency virus and feline leukemia virus , the etiological agents of acquired immunodeficiency syndromes in humans and cats , the feline system was used as a model to conduct preliminary investigations as to the efficacy of the thymidine analogue 3'-azido-3'-deoxythymidine ( azt ) as a therapeutic and preventive agent against retroviruses .
C0001175
acquired immunodeficiency syndromes
C0043474
azt