Fig. 2From: Mycoplasma bovis antibody dynamics in naturally exposed dairy calves according to two diagnostic testsDistribution of serum ELISA measurements in the MilA assay (AU = sample antibody units) of serum antibodies against M. bovis in four Danish dairy herds. Grey squares = “M. bovis”; black circles = “Respiratory”; grey dots = “Healthy”. Horizontal dashed lines show the recommended ELISA cut-off (135 AU). Vertical dotted lines indicate the limits for including observations in the modelling of antibody response dynamics. Results from the same calf are linked by linesBack to article page