1. K. Ireton and P. Cossart, Unité des Interactions Bactéries-Cellules, Institut Pasteur, 75724 Paris Cedex 15, France.
2. B. Payrastre and H. Chap, INSERM Unité 326, Hôpital Purpan, 31059 Toulouse, France.
3. W. Ogawa, H. Sakaue, M. Kasuga, Second Department of Internal Medicine, Kobe University School of Medicine, Chuo-ku, Kobe 650, Japan.