Microbiology

Microbiology Study Guide

12. ______________ is the most common route of accidental AIDS transmission to healthcare workers. a. Aerosol b. Mouth to mouth c. Fecal-oral d. Needle stick 13. Contaminated shrimp is likely to transmit which kind of organism? a. Vibrio b. Staphylococcus aureu c. Clostridium perfringens d. Giardia 14. __________________ and __________________ are sources of nutrients in nutrient agar. a. Agar and peptone b. Beef extract and peptone c. Peptone and NaCl d. NaCl and agar 15. How do symptoms of disease differ from signs of disease? a. Symptoms always occur as part of a syndrome b. Symptoms are specific for a particular disease c.

Symptoms are changes felt by the patient d. Symptoms can be observed by a physician 16. Which of the following best describes endotoxins? a. They are part of a gram-negative cell wall b. They are excreted from the cell c. They are specific in their method of action d. They are associated with gram-positive bacteria 17. What is best to sterilize heat-labile solutions? a. Pasteurization b. Membrane filtration c. Dry heat d. Autoclave

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