Fig. 3.

Graphical illustration of somatic cell count from Q-/q-uniparous cows after intramammary challenge. Somatic cell count (SCC) logarithmized to the base 10 in ml (log SCC 10³/ml) determined in milk sampled under sterile conditions from infected udder quarters after intramammary challenge with (a) Staphylococcus aureus (Q: n = 12 versus q: n = 12) and (b) Escherichia coli (Q: n = 6 versus q: n = 6) is shown. The first sample was taken before intramammary challenge and defined as 0 h relative to challenge. Afterwards, quarter milk samples were taken every 12 h. Data are presented as the mean and standard error of the mean (a) as the median and interquartile range (b). Differences between uniparous cows selected for favorable (Q) and unfavorable (q) haplotypes are indicated with * if P < 0.05 and with ** if P < 0.01. Significant differences within the haplotype groups over time relative to challenge are not shown