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Name:______________________________ APPLIED AND FOOD MICROBIOLOGY 394 FINAL EXAM DECEMBER 16, 2005 PART I. MULTIPLE CHOICE (two (2) points each) Choose the ONE best answer for each question. 1. This organism that immunocompromised individuals should be concerned with is found in Mexican-style cheese. A. Clostridium botulinum B. Clostridium perfringens C. Listeria monocytogenes D. Bacillus cereus 2. Which of the following is NOT a spore-former: A. Clostridium botulinum B. Bacillus cereus C. Listeria monocytogenes D. Clostridium perfringens 3. Which of the following is NOT one of the five different disease categories associated with infection of Listeria monocytogenes? A. pregnancy infections B. granulomatosis C. sepsis D. meningoencephalitis E. double vision 4. The saccharolytic nature of Clostridium perfringens causes what symptom? A. Diarrhea B. Vomiting C. Gas production D. Fever 5. What enzyme distinguishes Bacillus cereus from Clostridium? A. Catalase B. Lactase C. Lysozyme D. Glucose oxidase 6. Which of the following biochemical traits is NOT indicative of Bacillus cereus? A. Aerobic use of glucose B. Lysozyme-resistant C. Acid produced from mannitol D. Lecinthinase-producing 7. In a food-borne outbreak, victims had eaten fried rice and came down with the following symptoms: mild diarrhea occurring within 8-16 hours and lasting 12 hours, cramps, watery stools, vomiting within 1-6 hours and lasting from 6- 24 hours. What organism is the most likely cause? A. Clostridium perfringens B. Bacillus cereus emetic C. Staph aureus D. Bacillus cereus diarrheal 8. An outbreak from the consumption of water, with symptoms that include watery diarrhea, coughing and low-grade fever, is most likely caused by which organism? A. Clostridium perfringens 1
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B. Crytosporidium parvum C. Cyclospora D. Giardia 9. Lipopolysaccharide is found around the peptidoglycan layer of which organism? A. Listeria B. Clostridium A. Salmonella C. Bacillus 10. Which of the following is abundant within a spore? A. Small acid soluble proteins B. Anabolic enzymes C. Catabolic enzymes D. All of the above 11. Listeria utilizes a natural defense mechanism of the body to infect host cells, what is it? A. Antigen recognition by memory B cells B. Phagocytosis C. Actin tails D. Killer T cells 12. Which organism has two distinct toxins: one that is diarrheal and one that is emetic? A. Bacillus cereus B. Listeria monocytogenes C. Salmonella enterica D. Clostridium botulinum 13. What is the critical unknown parameter that can influence the frequency of a sampling plan? A.
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This note was uploaded on 03/30/2008 for the course FD SC 394 taught by Professor Batt,c.a. during the Fall '05 term at Cornell University (Engineering School).

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