A critically comparative investigation was performed on 228 quarter samples from 26 Friesland-type dairy cows respectively to evaluate the diagnostic value of conventional direct and indirect cytological methods and a single radial immunodiffusion test based on a polyvalent antiserum.
Data obtained suggest considerable diagnostic inaccuracies for all the methods tested. The lack of an adequate "mastitis standard" prevented a precise determination of the magnitude of the diagnostic inaccuracies.
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