R. Royce

Publications55
h-index25
Citations3,894
Highly Influential Citations94
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Sexual transmission of HIV.
This article focuses on the epidemiology and biology of the host-related factors that affect the sexual transmission of HIV. It discusses host susceptibility and infectiousness environment biologic… Expand
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Reduction of concentration of HIV-1 in semen after treatment of urethritis: implications for prevention of sexual transmission of HIV-1
BACKGROUND Transmission of HIV-1 is predominantly by heterosexual contact in sub-Saharan Africa, where sexually transmitted diseases (STDs) are also common. Epidemiological studies suggest that STDs… Expand
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Risk factors for horizontal transmission of hepatitis B virus in a rural district in Ghana.
Most hepatitis B virus (HBV) infections in sub-Saharan African infants and children are acquired through horizontal transmission, but the exact mechanisms of spread have not been documented. The… Expand
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Seroepidemiological survey of hepatitis B and C virus infections in Ghanaian children
The seroprevalences of hepatitis B virus (HBV) and hepatitis C virus (HCV) markers were evaluated in a random sample of 803 children attending school in Ashanti‐Akim North district in Ghana in order… Expand
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Patterns of T lymphocyte changes with human immunodeficiency virus infection: from seroconversion to the development of AIDS.
CD4 and CD8 T lymphocytes of three groups of men infected by the human immunodeficiency virus (HIV) were examined twice yearly for 36 months to elucidate the temporal trends in T lymphocytes during… Expand
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Race/ethnicity, vaginal flora patterns, and pH during pregnancy.
OBJECTIVES To investigate the relationship between bacterial vaginosis during pregnancy and black race/ethnicity. STUDY DESIGN Gram staining was used to evaluate vaginal flora in 842 women at 24 to… Expand
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High levels of human immunodeficiency virus type 1 in blood and semen of seropositive men in sub-Saharan Africa.
High levels of human immunodeficiency virus type 1 (HIV-1) replication, as reflected in HIV-1 RNA concentrations in blood and semen, probably contribute to both rapid disease progression and enhanced… Expand
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Predictors of discordant tuberculin skin test and QuantiFERON®-TB Gold In-Tube results in various high-risk groups.
SETTING Persons in whom targeted testing for latent tuberculosis infection (LTBI) is recommended in Seattle, Washington; Atlanta, Georgia; and central North Carolina, United States. OBJECTIVE To… Expand
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Physical and sexual violence during pregnancy and after delivery: a prospective multistate study of women with or at risk for HIV infection.
OBJECTIVES We sought to describe and compare prevalence rates of and risk factors for violence against women during pregnancy and postpartum. METHODS Physical and sexual violence and violence risk… Expand
  • 51
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The Perinatal Guidelines Evaluation Project HIV and Pregnancy Study: Overview and Cohort Description
Objective. The HIV and Pregnancy Study of the Perinatal Guidelines Evaluation Project is a prospective, longitudinal, multisite study established to: (a) assess the implementation of Public Health… Expand
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