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BS 375 Lecture Notes - Lecture 12: Microorganism, Commensalism, Escherichia Coli

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wrygaard6
15 Jan 2023
School
University of the Sciences
Department
Biological Sciences
Course
BS 375
Professor

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Document Summary

Host: the organism which is attacked and becomes diseased. Disease: the disease is a complex process and is the result of host-pathogen interaction. In simpler terms, disease is an abnormal condition. Infection: the process in which a microbe multiplies or grows in or on the host and causes disease. Incubation time: the time between infection and appearance of the symptoms. Pathogenicity: refers to the ability of a parasite to gain entry into the host tissue and brings about a change (anatomical or physical) resulting in a change of health and thus disease. Parasitism: refers to a relationship between two living organisms in which one partner is benefitted and the other is in loss. Opportunistic pathogens: these microbes exist as commensals in the body until normal defense mechanism is suppressed, when they invade the tissue and act as pathogens. Virulence: it is used in a quantitative sense giving a measure of the extent of pathogenicity of a parasite.

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Related Questions

Many microbes are not pathogenic. Their infections do not result in disease states. This assumes and implies that the immune system is capable of controlling them. When these organisms cause disease, we refer to them as opportunistic pathogens. Pseudomonas aeruginosa is one such organism; it does not cause disease in healthy individuals, but it causes serious wound infections with fatal outcome in burn patients, and its is also very serious in cystic fibrosis patients. Explain why in these patients, the second line of defense fails to control this microbe, whereas it is very effective in healthy individuals.

List 5 protozoan of different infectious diseases:

1. Causative agent: give the scientific name.

2. Description of pathogen: what type of microorganism, is it abacterium, its gram reaction and shape.

3. Reservoir/ where the pathogen is found:

4. Name of the disease:

5. Major symptoms: give the 3-5 main symptoms.

6. Treatment:

7. Reservoir and how the pathogen is transmitted:

List 2 Fungi infectious disease:

1. Causative agent:

2. Description of pathogen:

3. Reservoir / where the pathogen is found:

4. Name of disease:

5. Major symptoms of disease:

6. Treatments:

7. Reservoir and how the pathogen is transmitted: