Clinical and Diagnostic Laboratory Immunology, Jul 1995, 395-399, Vol 2, No. 4
Oral fluid as a specimen for detection and confirmation of antibodies to human immunodeficiency virus type 1
TC Granade, SK Phillips, B Parekh, CP Pau and JR George
Division of HIV/AIDS, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
Paired serum and oral fluid specimens (n = 287) were collected with the Omni-Sal device and were assayed for the presence of antibodies to human immunodeficiency virus type 1 (HIV-1). Enzyme immunoassays (EIAs)- -Abbott 3A11, an Organon Teknika Corporation research-use-only test, and the Murex GACELISA–were used per the manufacturers’ inserts or were modified slightly to accommodate the oral fluid specimens. Compared with serum Western blot (immunoblot) results, each EIA had a sensitivity of 100% and the specificities were 89.6% for the Abbott 3A11 EIA, 96.5% for the GACELISA, and 97.8% for the Organon Teknika Corporation EIA. Specificities based on specimens that were repeatedly reactive were 99.3% for all EIAs. A miniaturized Western blot technique used for confirmatory testing of both the serum and oral fluid specimens found 149 of the 287 samples to be HIV-1 antibody positive in both sample types. The Western blot banding patterns observed for the serum and oral fluid specimens were essentially identical. Immunoglobulin G concentrations were determined for all oral fluid specimens and ranged from < 0.5 to > 40.0 micrograms/ml. Immunoglobulin G concentrations did not correlate with the ability of any of the EIAs to detect HIV-1-specific antibody or with the ability of the modified Western blot to detect HIV-1 protein-specific antibodies.
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