Figure 1

Median and inter-quartile range of antibody titres against C. burnetii in intensively-managed goats. High IgG titres against phase 1 and phase 2 were detected after feeding colostrum during the follow up of 95 kid-goats. IgG phase 1 antibodies against C. burnetii were used to differentiate maternally-derived antibodies from immune response to C. burnetii exposure; IgG antibodies against phase 1 waned by 7 weeks. IgM titres started to rise from 2 weeks of age and reached the first peak at 8 weeks of age. This was followed by a rise in IgG phase 2 titres. A rise in IgG phase 1 titres then followed at 24 weeks of age in cohort 2 and 40 weeks in cohort 1. The solid light grey band shows the inter-quartile range of titres while the solid black line shows the median titres.