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Table 1 Standard curve dilutions on each Ov-16-IgG4 ELISA plate. The mean and standard deviation obtained for each dilution and the arbitrary units assigned to each dilution are shown. The plates were read when the 1/8 dilution reached a 0.5 OD value. The 1/64 dilution was determined as the cut-off, hence samples with OD-values above this value were considered positive

From: Evaluation of onchocerciasis seroprevalence in Bioko Island (Equatorial Guinea) after years of disease control programmes

Standard curve dilutions

Target mean (OD)

Standard deviation

Units

1/8

0.512

0.058

320

1/16

0.243

0.032

160

1/32

0.119

0.020

80

1/64

0.061

0.010

40

1/128

0.032

0.005

20

  1. The cut-off dilution and the corresponding OD value are marked in bold