Abstract
Nine ELISA tests and one particle agglutination test for the detection of HIV antibodies were analysed using serial dilutions of Western blot-confirmed positive serum samples. These samples were diluted in HIV antibody negative human serum in a range of 1:10 to 1:10 000 or 1:100 000. Remarkable differences in sensitivity were observed. Some tests were 10- to 100-fold more sensitive than others, and even differences of 1000-fold were detected.
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