1. INRAEInstitut Agro, STLO, F‐35000 Rennes France
2. Instituto de Ciências Biológicas ‐ Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
3. Univ Rennes, CNRS, IGDR [(Institut de génétique et développement de Rennes)]‐UMR 6290 Rennes France
4. Paul‐Ehrlich‐Institute, Federal Regulatory Agency for Vaccines and Biomedicines Langen Germany
5. Mikrobielle GenetikUniversität Tübingen Tübingen Germany
6. Laboratory of BacteriologyNational Institute of Allergy and Infectious Diseases, US National Institutes of Health Bethesda, Maryland, 20814 USA