Human immunodeficiency virus and AIDS have received much attention in the last decade. As the major cause of death in young adults, this concern is merited. AIDS has also ushered onto the clinical agenda a number of unusual and interesting pathogens. These have had considerably less attention than the virus itself, but are arguably as important. This book attempts to put into one volume a state of the art review of the basic biology of these opportunistic organisms. When compiling this book, the perceived difficulty was deciding how to restrict the number of chapters, as there is a large number of opportunistic organisms. It soon became clear, however, that the chapters would select themselves, as the work on many of these organisms was still in its infancy. We can be criticized for including Salmonella, which is not thought to be an opportunistic infection, and excluding Cryptococcus. Our defence is that the former has an interesting relationship with HIV and the latter is one of those organisms for which the basic biology is still in its early stages. The authors are all active researchers in their respective fields and we are grateful that they managed to review their subjects in the short turn-around time required for a book such as this not to be needlessly outdated on publication. We hope that, if nothing else, this book stimulates interest and more research on these agents: perhaps, in future editions, there will be much more to describe on their molecular biology.

This book is a festschrift to mark the career of ogy, immunology and clinical aspects of each Dr David Tyrrell, eminent virologist and group. There are also more general chapters physician. Almost all of the contributors have overviewing the clinical manifestations, treat been colleagues or students at some time ment and pathophysiology of respiratory during his career. Unlike most festschrifts, virus infections. In addition, chapters in however, the essays have been integrated to which psychological aspects and the ethical produce a comprehensive book that covers use of human volunteers are discussed will be the entire field of non-bacterial infections of of interest to all those involved with respira the human respiratory tract. This is a measure tory infectious agents. of the breadth of interest of the research We hope also that this book serves as a undertaken by David, spanning a period of fitting tribute to a man who is a true poly over 40 years. math: a physician, researcher, teacher, We hope that this book will be of interest mentor, linguist and ambassador for science, to microbiologists, virologists and in particu among other things. To those of us who have lar, to physicians. All the major virus groups contributed to this book, he is even more: a are covered, as well as chlamydial and friend.

The distinguished authors have perfected the most frequently performed oculoplastic surgical techniques. The Atlas is designed to instruct all ophthalmologists who wish to learn these techniques. Mastery of these procedures is made easy by numerous superbly illustrated step-by-step instructions. The study of the supporting anatomy, followed by clear-cut guidelines with heavily illustrated techniques, offers a format that allows the learner to gain the necessary understanding for achieving a more favourable result.

he desire to teach and the fulfillment attained from teaching T have again prompted us to produce a work that we hope will be both useful and enlightening to our readers. The field of oculoplastic surgery has grown and evolved to include all aspects of eyelid and facial plastic surgery. Our literature must now reflect the advancements and direction of our field. Knowledge of anatomy, the basis of all surgery and the root of surgical princi pIes and techniques, is the basis of our ability to deli ver the highest quality care to our patients. We have therefore combined text and diagrams, and supplemented them with CD-ROM digital video technology to provide to those who wish to perform this surgery the best possible instruction and prepa ration. We hope that our attempts to accomplish this will be rewarded by the use of our material by our colleagues and the acknowledgment of our unique and logical progression in the field of eyelid and facial plastic surgery. Future volumes in this series will cover other aspects of eyelid, lacrimal, facial, and orbital surgery.

The text's distinguished authors have perfected the most frequently performed oculoplastic surgical techniques. Starting with eyelid repair, their atlas is designed to instruct all ophthalmologists who wish to learn these techniques and thus enhance their income. Mastery of these procedures is made easier by following the step-by-step illustrations that are complemented by 22 video clips on 2 CD-ROMs. The study of the supporting anatomy, followed by clear-cut guidelines with heavily-illustrated techniques, offers a format which will allow the learner to gain the necessary understanding for achieving a more favorable result.