Contents: Overview; The Bacterial Cell; Biology of Viruses; Host-Parasite Interactions; Spread and Control of Infection; Pathogenic Bacteria; Pathogenic Viruses; Pathogenic Fungi; Organisms of Uncertain Origin; Local and Systemic Infections. Hardware and Software requirements: Windows variants: you will need an IBM-compatible PC (80386 or higher) with at least 4MB RAM and a hard drive, running Windows 3.1 or later and MS DOS 3.3 or later. Macintosh variants: you will need an English Macintosh computer (68030 or higher) with 2.5 MBytes of free RAM and a hard drive, running System 7.0 or later.