Immune Disorders Lab report
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| Assignment Type | Lab Report |
|---|---|
| Subject | N/A |
| Academic Level | Undergraduate |
| Citation Style | APA |
| Length | 1 page |
| Word Count | 300 |
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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.
Discussion
Serratia marcescens do not usually affect healthy human beings, but the immune-deficient patients on whom the bacteria take advantage. Some of the likely pathogenic factors associated with Serratia are the presence of cell wall antigens, formation of fimbriae, production of proteases, and the ability to resist the bactericidal action of serum—the factors that often bring about infection in human beings. The reaction with Lysine decarboxylase shows yellow after 24 hous and 48 hours because some strains of Serratia, particularly Serratia marcescens, produce an enzyme deoxyribonuclease. Besides, some varieties and biotypes of Serratia produce prodigiosin (2-methyl-3-amyl-6-methoxyprodigiosene), which is a non-diffusible red pigment.
Conclusion
This experiment was carried out to identify the bacterium responsible for the situation presented in the case study—how a bacterium can take advantage of a compromised immune system. This experiment work provides an approach of accounting the infective role of Serratia marcescens with that of other gram-negative bacteria like Escherichia coli, which are as well responsible for infections in immune-deficient humans.
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.
Discussion
Serratia marcescens do not usually affect healthy human beings, but the immune-deficient patients on whom the bacteria take advantage. Some of the likely pathogenic factors associated with Serratia are the presence of cell wall antigens, formation of fimbriae, production of proteases, and the ability to resist the bactericidal action of serum—the factors that often bring about infection in human beings. The reaction with Lysine decarboxylase shows yellow after 24 hous and 48 hours because some strains of Serratia, particularly Serratia marcescens, produce an enzyme deoxyribonuclease. Besides, some varieties and biotypes of Serratia produce prodigiosin (2-methyl-3-amyl-6-methoxyprodigiosene), which is a non-diffusible red pigment.
Conclusion
This experiment was carried out to identify the bacterium responsible for the situation presented in the case study—how a bacterium can take advantage of a compromised immune system. This experiment work provides an approach of accounting the infective role of Serratia marcescens with that of other gram-negative bacteria like Escherichia coli, which are as well responsible for infections in immune-deficient humans.