A visual and practical guide on swine leptospirosis aimed at field practitioners to assess and review the current situation of this disease. This book, written by an author with a wide experience, describes the most relevant aspects of the aetiology, epidemiology (with a special emphasis on concepts such as ?natural nidi?, maintenance host and accidental host), pathogenesis, clinical picture, lesions, diagnosis (particularly the interpretation of the results of the diagnostic tests performed), treatment and control of the disease. The book includes numerous visual resources that facilitate the understanding of the text.