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Scott McClelland, MD, MPH, BS

Professor, Allergy and Infectious Dis. (primary department)
Professor, Epidemiology
Professor, Global Health

Dr. McClelland is an Associate Professor of Epidemiology, Medicine, and Global Health. He is co-Director of the University of Washington's Center for AIDS Research (CFAR) International Core, and a member of the International AIDS Research and Training Program and the Kenya Research Program faculty. Dr. McClelland is Site Leader for the University of Washington (UW)/University of Nairobi (UON) Mombasa HIV/STD Research Site. This highly productive research field site includes strong collaborative research efforts between the UW, UON, the Kenya Medical Research Institute (KEMRI), Coast Provincial General Hospital, the Municipal Council of Mombasa, and the Kenya Ministry of Health.

Contact Information
University of Washington
Box 359909
325 9th Avenue
Seattle, WA 98104-2499
Tel: 206-543-4278

Office: Ninth and Jefferson Building (NJB) 1351

Research Interests
Dr. McClelland's research focuses on human immunodeficiency virus (HIV) and sexually transmitted infection (STI) epidemiology and prevention in most at-risk populations including female sex workers and men who have sex with men. This includes both primary prevention strategies for reducing the risk of HIV/STI acquisition and secondary prevention aimed at reducing infectiousness and risk behavior in people living with these conditions.

Dr. McClelland is the Protocol Chair for a Sexually Transmitted Infections Clinical Trials Group funded study entitled, "Preventing Vaginal Infections (PVI Trial)." This double-blind, randomized trial is evaluating the efficacy of monthly treatment with topical metronidazole and fluconazole co-formulated suppositories versus placebo for preventing vaginal infections in HIV-1-seronegative women. Vaginal infections have been associated with increased risk for HIV-1 acquisition, and may account for a high population attributable risk of HIV-1 infection. The PVI trial is ongoing, and includes sites in Mombasa and Nairobi, Kenya as well as Birmingham, Alabama.

Dr. McClelland is the study leader for an NIH/NICHD-funded P01 study that is part of a program-project grant entitled "Mechanisms and Cofactors for HIV-1 Transmission in Women."Dr. McClelland's project, entitled "Vaginal Flora and HIV-1 Acquisition in Women" involves a multi-site case-control study to compare vaginal bacterial flora using molecular methods in HIV-1 seroconverters compared to controls who remain HIV-1 seronegative. Participants include the high-risk cohort in Mombasa and a cohort of pregnant and post-partum women in Kisumu, Kenya.This study is ongoing.

Teaching Interests
Dr. McClelland teaches Epidemiology 532, "Epidemiology of Infectious Diseases in Resource-Limited Countries."The course is offered every other year (odd number years) in the Spring.He is a regular lecturer in med 561 (Tropical Medicine), EPI 507/OBGYN590 (HIV and STDs in Women and Children), EPI 530 (AIDS, A Multidisciplinary Approach), and GH573 (Clinical Management of HIV).

MPH, Epidemiology, University of Washington, SPH 2001
MD, Medicine, University of Washington, School of Medicine 1995 Resident in Internal Medicine, Duke University (1995-1998)
Fellow in Infectious Diseases, University of Washington (1998-2002)
BS, Biology, University of Washington, College of Arts and Sciences 1989


  • Effect of antiretroviral therapy on infectivity and sexual risk behavior in Kenyan women
  • Prevalence, correlates, and clinical outcomes of HIV-1/HBV co-infected women receiving antiretroviral therapy
  • Polymorphisms in the CYP2B6 drug metabolizing enzymes, clinical outcomes, and adverse drug events in antiretroviral treated Kenyan women
  • Incidence and epidemiologic correlates of HIV-1 superinfection
  • Vaginal ecology and the risk of HIV-1 and STIs in women

  • Randomized trial of periodic presumptive treatment to reduce vaginal infections in women at risk for HIV-1 and STIs

  • Women's Lifecourse Events and HIV Transmission Potential: A Multidisciplinary Study

Selected Publications
McClelland RS, Lavreys L, Hassan WM, Mandaliya K, Ndinya-Achola JO, Baeten JM.Vaginal washing and increased risk of HIV-1 acquisition among African women:A 10-year prospective study.AIDS 2006, 20:269-273.


McClelland RS, Sangaré L, Hassan WM, Lavreys, L, Mandaliya K, Kiarie J, Ndinya-Achola J, Jaoko W, Baeten JM. Infection with Trichomonas vaginalis increases the risk for HIV-1 acquisition. J Infect Dis 2007; 195:698-702.


McClelland RS, Richardson BA, Hassan WM, Chohan V, Lavreys L, Mandaliya K, Kiarie J, Jaoko W, Ndinya-Achola J, Baeten JM, Kurth AE, Holmes KK. Improvement of vaginal health for Kenya women at risk for acquisition of human immunodeficiency virus type 1: Results of a randomized trial. J Infect Dis 2008; 197:1361-1368.


McClelland RS, Graham SM, Richardson BA, Peshu N, Masese LN, Wanje GH, Mandaliya KN, Kurth AE, Jaoko W, Ndinya-Achola JO. Treatment with Antiretroviral Therapy is Not Associated with Increased Sexual Risk Behaviour in Kenyan Female Sex Workers. AIDS 2010;24:891-897.


Graham SM, Masese L, Gitau R, Jalalian-Lechak Z, Richardson BA, Peshu N, Mandaliya K, Kiarie JN, Jaoko W, Ndinya-Achola JO, Overbaugh J, McClelland RS. Antiretroviral adherence and development of drug resistance are the strongest predictors of genital HIV-1 shedding among women initiating treatment. J Infect Dis 2010; 202:1538-1542.

Division of Infectious Diseases: http://depts.washington.edu/daid/directory/mcclelland.html

Department of Global Health: http://depts.washington.edu/deptgh/about_us/profile_scottmcclelland.php

Center for AIDS Research: http://depts.washington.edu/cfas/cfar/center/

Kenya Research Program:


Mombasa Field Site: http://www.womenshealthprojectmsa.org/index.html

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