Fig. 2From: Comparison of three commercial serological tests for the detection of Chlamydia abortus infection in ewesTris-buffer ewes tested with MVD-Enfer kit. MVD-Enfer kit showing antibody levels in ewes vaccinated with Tris-buffer across the six timepoints; as described in Fig. 1. Vaccination, challenge and lambing of ewes occurred as described in Fig. 1. Dashed line indicates point of sero-positivity > 30 S/P%Back to article page