Chapter 21.5, Problem 16AYP

Summary Introduction

To explain:

The diverse organisms which cause the disease pneumonia.

Concept introduction:

Microorganisms infect the human body and cause infection. In pneumonia, the respiratory system is affected leading to swelling, redness, and inflammation. They are classified as gram $\text{+ve}$ and gram $\text{-ve}$. They are visible under the microscope in a variety of shapes and sizes like cocci, bacillus, and spirillum.