Sexually transmitted infections (STI) are a major public health problem both in their own right and because of their link with HIV infection. This has elevated their control to an absolute priority throughout the world. In developing countries, which account for approximately 75% of the easily curable STI, as estimated by the WHO, and where sexually transmitted HIV infection has reached epidemic proportions, the need is most acute. Here AIDS is claiming hundreds of thousands of lives and will continue to do so for the foreseeable future. In addition, because of inadequate resources, the sequelae of STI (e,g, infertility and some cancers) contribute greatly to ill-health in the tropics. This book written by acknowledged experts working or with experience in tropical countries, gives clear, concise and up-to-date knowledge and understanding on all aspects of sexually transmitted infections . It should be useful for all those involved in the appropriate management and control of STI in various settings, ranging from peripheral and rural and urban health care centres to large hospitals. It also be useful for students of tropical medicine, medical microbiology and genito-urinary medicine.