microbiology final exam with answers

El Camino College Compton Educational Center Microbiology 33 Final Lecture Exam A & B By Dr. Eyob Wallano Instruction: Please use the provided scantron to answer all questions from each section. 5% will be taken off from your total score if any marking is left on the exam booklet. Section E and F will be answered separately on provided paper and submitted with the booklet. Section A. Multiple Choice 1. An epidemic disease is one that A. breaks out in higher than usual proportions in a population. 2. A scientist who studies the patterns of disease in a community and attempts to locate its source is called a(n) B. epidemiologist. 3. What specific job is this person fulfilling? She isolates the cause of an outbreak, prevents its spread, and gets out public health messages to people who could have been exposed. C. Epidemiologist 4. The relationship between the human body and its microbiota D. is an example of a symbiosis. 5. Which of the following would be the reservoir of infection for a zoonosis? D. Animal 6. Which of the following is an example of indigenous microbiota? Indigenous microflora is defined as the community of micro-organisms that live on or in another living organism or in a particular environment. These micro- organisms include bacteria, algae and fungi. A. Escherichia coli in the intestines B. Candida albicans in the intestines C. Lactobacillus in the human vagina D. All of the above are correct 7. Indigenous microbiota may be found in all of the following environments except A. the blood. 8. Which one of the following does not contribute to the virulence of a bacterial species? D. Its ability to grow on artificial laboratory media. 9. Certain microorganisms inhabit parts of the body without causing symptoms of disease. These organisms collectively are referred to as A. indigenous microbiota. 10. The degree to which an organism is able to cause disease is referred to as its B. pathogenicity 11. Pathogenicity islands refer to B. clusters of genes responsible for virulence. 12. Opportunistic organisms are those that C. are usually commensals but can cause disease when body defenses are suppressed. 13. The organisms that infect individuals with AIDS D. are examples of opportunistic organisms 14. Pseudomonas aeruginosa is a soil organism. Every time we eat a fresh salad, we consume millions of these organisms. They usually do us no harm. However, these same organisms can cause serious infection in persons who have been severely burned. Such a pathogen is called C. opportunistic. 15. Pneumocystis pneumonia in an AIDS patient would be considered a(n) D. secondary disease. 16. Such factors as the number of organisms, their generation time and virulence, and the level of host resistance can influence B. the incubation period for a disease