1/26/2016 Microbes Pathology,Infection,and Disease Learning Objective Invisible Invaders Define pathology,etiology,infection,and disease. Amazing Allies Chapter 14 Principles of Disease and Epidemiology Pathology:the study of disease Infection:invasion or colonization of the body by Pathology has three objectives. pathogens presence of a microbe in a 1-Etiology:the cause of a disease part of the body where it is not normally found 2-Pathogenesis:the development of MRSA disease 3-Structural and functional changes brought about by disease and their in effects on the body performing normal functions E.coW 0157:H7 An infection may exist in the absence of detectable disease.No symptoms are apparent. 1/26/2016 1 Invisible Invaders Amazing Allies Chapter 14 Principles of Disease and Epidemiology Pathology, Infection, and Disease Learning Objective Define pathology, etiology, infection, and disease. Pathology: the study of disease Pathology has three objectives. 1-Etiology: the cause of a disease 2-Pathogenesis: the development of disease 3-Structural and functional changes broug y ht about by disease and their effects on the body Infection: invasion or colonization of the body by pathogens presence of a microbe in a p y art of the body where it is not normally found Pathogens: disease-causing microorganisms Disease: an abnormal state in which the body is not perf i l f ti forming normal functions An infection may exist in the absence of detectable disease. No symptoms are apparent