Oral and systemic factors associated with increased levels of human immunodeficiency virus type 1 RNA in saliva

Abstract

Objective: The purpose of this investigation was to quantify human immunodeficiency virus type-1 (HIV-1) RNA in saliva and plasma and identify factors associated with increased salivary viral load.

Study design: Forty HIV-1-seropositive adults underwent oral examinations to assess mucosal and periodontal health. Whole saliva was evaluated for HIV-1 RNA titer and occult blood. Plasma viral load, CD4 cell count, HIV-1 staging, and antiretroviral therapy data were obtained from medical records. Associations between salivary titers and oral/systemic parameters were analyzed by means of t tests, Wilcoxon signed rank tests, Pearson's correlation coefficient, and analysis of covariance.

Results: Forty-two percent of the subjects had detectable salivary HIV-1 RNA. Oral titers were highly correlated with plasma viral levels (r = 0.51, P <.01). HIV-associated periodontal disease (in particular, linear gingival erythema), severe gingival inflammation, and absence of antiretroviral therapy were associated with high salivary titers (P <.01).

Conclusions: Substantial quantities of HIV-1 can be shed in the oral cavity, particularly when inflammatory conditions are present. Salivary titer may be a useful indicator of systemic viral burden.