Opportunists or opportunistic pathogens A. are usually saprophytes. B. take adva

Question

Opportunists or opportunistic pathogens A. are usually saprophytes. B. take advantage of special circumstances such as a decline in host immunity C. are usually organisms normally in commensalistic relationships with the body D. always cause disease whenever they are present in the body E. Both B and C are correct Which of the following does Streptococcus. pneurnoniae use to survive in the host thereby acting as a virulence factor? A. capsules B. pili C. flagella D. plasmids People who carry and may spread pathogenic organisms without any overt symptoms of illness are called A. primary infections. B. secondary infections. C. mutualists. D. carriers. Examples of diseases in which the causative agents frequently become talent will include A. cold sores. B. genital herpes. C. typhus. D. shingles. E. All of the choices are correct. The mortality rate for Ebola disease is stated as 60%. This represents the A. percentage of exposed population that gets the disease. B. percentage of people infected that die of the disease. C. percentage of people newly diagnosed of the disease in a given period. D. percentage of exposed population that develops herd immunity The most serious consequence of rubella (German measle) is A. encephalitis. B. meningitis. C. deafness. D. birth defects. Diseases that primarily exist in animals, but may be transmitted to humans are called A. parasitic. B.zoonotic. C. symbiotic. D. epidemic.

Explanation / Answer

1. A. Usually saprophytes.

2. D. Plasmid( which posses genetic information).

3. D. Carriers.

4. C. Typhus.

5. B. % Of people exposed to these disease and die.

6. D. Birth defects.

7. A. Parasites.

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