In dairy cattle, the milk somatic cell count is the most widely accepted indicator for the presenceof intramammary infections. The aim of this study was to compare the results of the electronic cellcounting on 179 composite milk samples with the results of two commercially available CaliforniaMastitis Tests (CMT), based on either the thickening of the solution or the thickening of the solution incombination with a color change.The most frequently isolated major pathogens in the milk samples were Streptococcus uberis andStaphylococcus aureus and the minor pathogens most isolated were the non-aureus staphylococci. Thesomatic cell count estimated with the CMT-tests corresponded well with the one obtained with theFossomatic™. For both CMT-tests, the test characteristics were mutually comparable as well as withthe one obtained with the electronic cell counting. Based on the findings, it can be concluded that bothCMT-tests can be used in the field to help detect cows suffering from an intramammary infection dueto major pathogens.