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Journal of Virology, June 2003, p. 7120-7123, Vol. 77, No. 12
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.12.7120-7123.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Comparison of Human Immunodeficiency Virus Type 1 Viral Loads in Kenyan Women, Men, and Infants during Primary and Early Infection

Barbra A. Richardson,1,2* Dorothy Mbori-Ngacha,3 Ludo Lavreys,4 Grace C. John-Stewart,3,4,5 Ruth Nduati,3 Dana D. Panteleeff,6 Sandra Emery,6 Joan K. Kreiss,4,5 and Julie Overbaugh2,6

Departments of Biostatistics,1 Epidemiology,4 Medicine, University of Washington,5 Divisions of Public Health Sciences,2 Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington,6 Department of Paediatrics,3 University of Nairobi, Nairobi, Kenya7

Received 26 December 2002/ Accepted 12 March 2003

Steady-state levels of human immunodeficiency virus type 1 (HIV-1) RNA in plasma reached at approximately 4 months postinfection are highly predictive of disease progression. Several studies have investigated viral levels in adults or infants during primary and early infection. However, no studies have directly compared these groups. We compared differences in peak and set point plasma HIV-1 RNA viral loads among antiretrovirus-naive Kenyan infants and adults for whom the timing of infection was well defined. Peak and set point viral loads were significantly higher in infants than in adults. We did not observe any gender-specific differences in viral set point in either adults or infants. However, infants who acquired HIV-1 in the first 2 months of life, either in utero, intrapartum, or through early breast milk transmission, had significantly higher set point HIV-1 RNA levels than infants who were infected after 2 months of age through late breast milk transmission or adults who were infected through heterosexual transmission.

* Corresponding author. Present address: Harborview Medical Center, Box 359909, 325 Ninth Ave., Seattle, WA 98104-2499. Phone: (206) 731-2425. Fax: (206) 731-2427. E-mail: barbrar{at}u.washington.edu.

Journal of Virology, June 2003, p. 7120-7123, Vol. 77, No. 12
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.12.7120-7123.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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