Fig. 3

ELISA results for antibodies against N. caninum on serum samples from a llama experimentally inoculated with 4.8 × 10E6 cell culture-derived N. caninum tachyzoites (Llama 1) and from a control llama inoculated with 5 × 10E4 Vero cells (Llama 2) [30]. a ID Screen® Neospora caninum indirect multi-species, S/P% = sample-to-positive ratio, calculated based on the OD (optical density) of the sample and the positive and negative controls of the kit according to the formula S/P% = (OD_sample − OD_{negative control}/OD_{positive control} − OD_{negative control}) × 100. b ID Screen® Neospora caninum Competition, S/N% = competition percentage, calculated according to the formula: S/N% = (OD_sample/OD_{negative control}) × 100