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Division of Infectious Diseases, Ahmanson Pediatric Center, Los Angeles, CA 90048.
The human immunodeficiency virus type 1 (HIV-1) was isolated from the plasma and peripheral blood mononuclear cells (PBMCs) from each of 21 infected children. The mean titers in plasma were 7 and 165 tissue culture-infective doses per milliliter in 9 children with asymptomatic (P-1) and 12 with symptomatic (P-2) infection, respectively (P = .0013). Significantly higher viral titers were found in PBMCs obtained from P-2 compared with P-1 children: 1920 vs 25 tissue culture-infective doses per 10(6) PBMC (P = .0018). In symptomatic patients at least 1 in 520 circulating mononuclear cells harbored HIV-1. No correlation was found between the viral burden and CD4+ lymphocyte counts. A decrease in the HIV-1 titers was noted both in PBMCs and plasma of symptomatic patients treated with zidovudine for 2 to 7 months. It is concluded that symptomatic children harbor a higher amount of the virus in plasma and PBMCs than asymptomatic children. Zidovudine treatment for 2 months or more decreased the amount of HIV-1 in PBMCs and plasma.
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