Work experience for many years as researcher at: 1. National Reference Centre, Lab Bacteriology, NVWA, Wageningen, NL 2. Laboratory of Phytopathology, Wageningen University, Wageningen, NL. 3. Department of Biology, University of Groningen, Groningen, NL 4. NIKO-TNO (Netherlands Institute for Carbohydrate Research - Netherlands Organisation for Applied Technical Research), Groningen, NL 5. BLGG Research BV, Naaldwijk, NL Research fields: 1. Biology, epidemiology and taxonomy of diverse Q-bacteria, including studies on their diversity, host affinity and activity 2. Detection and characterization of Q-bacteria, including the development and optimalisation/validation of diagnostic protocols for Q-bacteria.