title: Frequent detection and isolation of cytopathic retroviruses (HTLV-III) from patients with AIDS and at risk for AIDS.
abstract: Peripheral blood lymphocytes from patients with the acquired immunodeficiency syndrome (AIDS) or with signs or symptoms that frequently precede AIDS (pre-AIDS) were grown in vitro with added T-cell growth factor and assayed for the expression and release of human T-lymphotropic retroviruses (HTLV). Retroviruses belonging to the HTLV family and collectively designated HTLV-III were isolated from a total of 48 subjects including 18 of 21 patients wih pre-AIDS, three of four clinically normal mothers of juveniles with AIDS, 26 of 72 adult and juvenile patients with AIDS, and from one of 22 normal male homosexual subjects. No HTLV-III was detected in or isolated from 115 normal heterosexual subjects. The number of HTLV-III isolates reported here underestimates the true prevalence of the virus since many specimens were received in unsatisfactory condition. Other data show that serum samples from a high proportion of AIDS patients contain antibodies to HTLV-III. That these new isolates are members of the HTLV family but differ from the previous isolates known as HTLV-I and HTLV-II is indicated by their morphological, biological, and immunological characteristics. These results and those reported elsewhere in this issue suggest that HTLV-III may be the primary cause of AIDS.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood / Q000382:microbiology*; D000328:Adult; D000956:Antigens, Viral / Q000032:analysis; D002478:Cells, Cultured; D003588:Cytopathogenic Effect, Viral; D017977:Deltaretrovirus / Q000302:isolation & purification* / Q000502:physiology / Q000648:ultrastructure; D005260:Female; D006716:Homosexuality; D006801:Humans; D007106:Immune Sera / Q000494:pharmacology; D007370:Interferon Type I / Q000276:immunology; D008297:Male; D012194:RNA-Directed DNA Polymerase / Q000378:metabolism; D012306:Risk; D013601:T-Lymphocytes / Q000382:microbiology
chemical_list: D000956:Antigens, Viral; D007106:Immune Sera; D007370:Interferon Type I; D012194:RNA-Directed DNA Polymerase