What is a Disease?

A disease can be defined as any deviation from what may be considered ’healthy’. In a larger sense, this includes diseases caused not only by pathogens but also by environmental or physiological factors. So generally we split diseases into two categories; biotic and abiotic. Biotic for diseases caused by living organisms and abiotic for diseases caused by non- living components. In the manual, we will mostly be concerned with diseases caused by living organisms.

Introduction

Disease Development