The new edition of the well-known field guide on African animal trypanosomiasis adheres as much as possible to the original style and, particularly, to the intention of the author of the first edition in that it is essentially meant to be a guide for field control personnel. Its scope has been extended somewaht beyond that of the African continent, as trypanosomes of African origin have spread to the Americas as well as to Asia, and even to Europe, but the main emphasis remains on Africa. More a ttention is also given to methods of control of the disease other thn those using chemotherapy and chemoprophylaxis, as it is being realized that drugs alone are not a sustainable answer, and have to be integrated into a multidisciplinary and flexible approach to control the disease.