Operskalski E A, Busch M P, Mosley J W, Stram D O
Department of Medicine, University of Southern California School of Medicine, Los Angeles 90032, USA.
J Acquir Immune Defic Syndr Hum Retrovirol. 1997 Jun 1;15(2):145-50. doi: 10.1097/00042560-199706010-00008.
Rates of HIV-1 progression vary widely. To investigate the relative effects of viral and host characteristics on course, we compared persons infected by the same and different subtype B strains. Forty-three infection chain clusters were identified, each defined by an infected blood donor, that donor's recipients, and the recipients' sexual partners, representing second and third generations of infection. Analysis of levels and rates of change in CD4 lymphocyte counts and viral load showed that members within a cluster were no more alike in their rates of change in CD4+ lymphocyte counts or viral RNA levels than among clusters. Differences in entry viral RNA levels by cluster were marginal and markedly smaller than interindividual differences. These results argue that, in general, host factors outweigh differences in viral strain in determining HIV-1 disease progression.
