Study guide- chapter 18 section

Study guide- chapter 18 section - 18 1. What is the...

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18 1. What is the difference between a microbe and a pathogen? a. Pathogen i. Disease Causing Organism b. Microbe i. Organisms that can be seen only through a microscope 2. What is the difference between infectious and contagious? a. Contagious i. When a pathogen can be spread from one organism to another b. Infectious i. A tissue inside the body that will support its growth 3. What are some examples of organisms from each of the four main groups of infectious agents a. Bacteria i. Bacilli, Cocci, Spirochetes, Salmonella, b. Virus- i. Small pox, measles, cow pox c. Parasites – i. Malaria, Giardia, Sleeping sickness, worms, yeast d. Prion – i. Mad Cow Disease, kuru 4. What are the differences between the four main groups of infectious agents? a. Bacteria i. Single-celled, prokaryotic organisms b. Viruses i. Diverse group of protein-coated nucleic acid molecules
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c. Parasites i. An organism that obtains nutrients and shelter for growth and development from a host organism while contributing nothing to the survival of the host d. Prion i. Proteinaceous infectious particles 1. Misfolded versions of normally occurring brain cell proteins 5. How do bacteria reproduce themselves? How do viruses reproduce themselves? a. Binary fission i. Bacterial cell divides by binary fission, the single, circular chromosome that is attached to the plasma membrane inside the cell wall is copied b. Copy Genome i. Virus copies itself using the host cell’s ribosomes and amino acids to make new capsids and envelope proteins 6. Which treatments work against which types of infectious agents? a. Bacteria i. Prevention: Vaccines ii. Treatment: Antibiotics b. Viruses i. Prevention: Vaccines ii. Treatment: Antivirals c. Parasites i. Prevention: Sanitary living conditions ii. Treatment: Antifungal, medication d. Prions i. Prevention: Not be exposed ii. Treatment: None 7. What is the difference between an epidemic and a pandemic? a. Epidemic
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i. Contagious disease that spreads rapidly and extensively among members of a population b. Pandemic i. Occurring over a large geographic area and affecting an exceptionally large proportion of the population 8. What is the difference between an acute illness and a chronic illness? a. Acute i. Illness with a sudden onset, sharp rise, and short course b. Chronic i. Illness with a long duration or frequent recurrence over a long time; often becomes more serious over time 9. When would knowing the incidence of a disease be useful and when would prevalence be useful? a. Incidence is the rate of occurrence of new cases of a particular disease in a population often used for acute diseases such as: Ecoli, salmonella, SARS i. So you are able to avoid sources of the disease b. Prevalence is the percentage of a population that is affected with a particular disease at a given time most often used for chronic diseases i. To be able to quarantine the disease 10. What is an outbreak? a.
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This note was uploaded on 04/10/2008 for the course BIO 110 taught by Professor Bright during the Fall '07 term at Sonoma.

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Study guide- chapter 18 section - 18 1. What is the...

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