TABLE 1.

Comparative HIV-1 and HIV-2 screening assays used in the multicenter study

Assay	Manufacturer	Test principle	No. of samples tested	No. of centers using the assay
Abbott Recomb. HIV-1/HIV-2 3rd Gen. EIA	Abbott, North Chicago, Ill.	Antigen sandwich EIA	895	9
Abbott HIV-1/HIV-2 3rd Gen. Plus EIA	Abbott, North Chicago, Ill.	Antigen sandwich EIA	1,169	4
IMx HIV-1/HIV-2 3rd Gen.	Abbott, North Chicago, Ill.	Antigen sandwich MEIA	1,393	9
IMx HIV-1/HIV-2 3rd Gen. Plus	Abbott, North Chicago, Ill.	Antigen sandwich MEIA	670	4
Axsym HIV-1/HIV-2	Abbott, North Chicago, Ill.	Antigen sandwich MEIA	458	2
Enzygnost Anti-HIV 1/2 Plus	Behringwerke, Marburg, Germany	Antigen sandwich EIA	2,222	6
Bioelisa HIV-1+2	Biokit S.A., Barcelona, Spain	Antigen sandwich EIA	100	1a
Biotest Anti-HIV-1/2 Recombinant	Biotest, Dreieich, Germany	Indirect EIA	99	1a
Serodia-HIV-1/2 Type 2	Fujirebio, Inc., Tokyo, Japan	Particle agglutination assay	165	2a
Serodia-HIV	Fujirebio, Inc., Tokyo, Japan	Particle agglutination assay	248	2
Wellcozyme HIV Recombinant	Murex, Dartford, England	Competitive EIA	1,205	8
Vironostika HIV Uni-Form II	Organon Technika BV, Boxteel, Holland	Antigen sandwich EIA	443	2
Genelavia Mixt	Sanofi Pasteur, Marnes la Coquette, France	Antigen sandwich EIA	882	7
Anti HIV-1/HIV-2 EIA DAGS Cobas Core	Hoffmann La Roche, Basel, Switzerland	Antigen sandwich EIA	152	1a
Anti HIV-1/HIV-2 EIA	Hoffmann La Roche, Basel, Switzerland	Antigen sandwich EIA	105	1a
ETI-AB-HIV-1/2 K	Sorin Biomedica, Saluggia, Italy	Antigen sandwich EIA	109	1a
Micro Trak II HIV-1/HIV-2 EIA	Syva, Palo Alto, Calif.	Indirect EIA	297	2a

^aResults are not shown in the present study, since the low sample number tested with this assay allows no statistically valid conclusion.