When comparing the number of contributions for the proceedings of the third symposium on The Influence of Antibiotics on the Host-Parasite Relationship with those of its two predecessors, one becomes aware of the progress that has been made in this field. It is obvious that the design of experiments has substantially refined and therefore the clinical relevance of the results has gained in significance. The editors of this volume would like to thank all the colleagues who contributed to this book. It is hoped that interest in this field will develop further and that it will finally yield results which one day may be the basis for an improvement of antibiotic therapy. Bochum WOLFGANG OPFERKUCH Contents Opening Remarks P. G. Quie .... Interactions Between Antibiotics, Phagocytes, and Bacteria W. L. Hand, N. L. King-Thompson, T. H. Steinberg, and D. L. Hand. With 2 Figures and 5 Tables . . . . . . .. 4 Influence of Antibiotics on the Cell Surface of Escherichia coli H. Leying, S. Suerbaum, H.-P. Kroll, J. Gmeiner, and W. Opferkuch. With 2 Figures and 3 Tables . . . . . 17 Pseudomonas aeruginosa: Alterations Induced by Low Concentrations of 4-Quinolones M. T. Labro, A. Bryskier, C. Babin-Chevaye, and J. Hakim.

This book contains 32 chapters based on the corresponding papers delivered at the International Symposium on Antimicrobial Agents and Immunity, held in Siena, Italy on May 2-4, 1985 as a Satellite Symposium of the Third International Conference on Immunopharmacology, held in Florence, Italy on May 6-10, 1985. As editors we express our profound appreciation and gratitude to the authors who have contributed so richly to this volume, and we think that it may not be too much to hope that a new cadre of investigators and students will share this gratitude for these records of experience and insight into antibiotic and host-parasite interactions. We owe a very special gratitude to Mrs. Christine Abarca for her outstanding editorial assistance in the preparation of this book. Andor Szentivanyi, M.D. University Distinguished Professor Departments of Pharmacology and Internal Medicine University of South Florida College of Medicine Tampa, Florida Herman Friedman, Ph.D. Professor and Chairman Department of Medical Microbiology and Immunology University of South Florida College of Medicine Tampa, Florida Gunther Gillissen, M.D., Ph.D. Professor and Chairman Department of Medical Microbiology Faculty of Medicine RWTH, Aachen, F.R.G.