Abstract
1 Staatliches Medizinaluntersuchungsamt, D-38124 Braunschweig, Germany
5 Fachgebiet Hygiene, Technische Universität, D-13353 Berlin, Germany
2 Emerging Bacterial and Mycotic Diseases Branch, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta. Georgia 30333
3 Division of Biochemistry, Walter Reed Army Institute of Research, Washington. D.C. 20307-5100
4 Unité des Enterobactéries. Institut National de la Santé et de la Recherche Médicale Unité 389. Institut Pasteur, F-75724 Paris Cedex 15, France