Chapter 14, Problem 6SA

Summary Introduction

To describe:

The three modes of disease transmission.

Introduction:

Microorganisms that cause disease are termed as pathogens or the infectious causative agents. When a pathogen invades the tissue of an individual, it will lead to infections. Most infections can evade the defense mechanisms of the body, some infectious agents not only evade the defense systems and proliferate, but also influence functions of the body, and it will lead to cause disease.