Toxoplasmosis in Sheep

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Abstract
Sera were tested in 2 series both by the conventional technique (dilution in tubes) and by the microtiter system. In 1 series of comparative examinations the tests were performed with the same batch of accessory factor serum and antigen preparation, and in another series the tests were performed at 2 different laboratories. There was a high correlation between the 2 methods, but the titres obtained by the microtiter system were about 1 to 2 twofold dilutions lower than those obtained by the conventional dilution technique. The 95 % confidence limits by the microtiter system were plus and minus 1 twofold dilution.