Analyzing the Bacterium Serratia Marcescens (Lab Report Sample)

Introduction
Foreign invaders constantly attack the body of a human being to cause infection and disease. Accordingly, the body is in possession of various external and internal defense mechanisms that keep it from the most dangerous pathogens from penetrating and causing harm. One of such mechanisms is immunity, which is the condition of being safeguarded against a transmissible disease. This mechanism often improves after a pathogen enters the body, as well as when the body makes antibodies to fight the pathogen. Bacteria like Serratia marcescens may not be harmful, but they can bring about serious infections for human bodies with weakened immune systems. The purpose of this experiment was to identify the bacterium responsible for the situation presented in the case study, particularly, how a bacterium can take advantage of a compromised immune system.