We report the case of a patient, suffering from Whipple's disease and HLA B27 positive ankylosing spondylitis with syndesmophytes and erosive discopathy. Since spinal radiographic aspects of spondylitis due to Whipple's disease are unusual, we are debating on their relation. We, then, took an interest in the treatment given to this patient: trimethoprime-sulfamethoxazole which would now appear to be the best antibiotic for Whipple's disease.