Antibiotics and infection control Quiz
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5 questions, one answer each
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1. Antibiotic A stops bacteria dividing but does not kill them. What is it?
- A. Bactericidal
- B. Antiviral
- C. Antigenic
- D. Bacteriostatic
2. Why is the lid of the Petri dish taped on but not sealed completely in Core Practical 14?
- A. To let oxygen in and prevent anaerobic pathogens growing
- B. To keep the bacteria cool
- C. To stop the antibiotic evaporating
- D. To let the bacteria escape
3. A clear zone of 22 mm surrounds one disc and 12 mm another. What can be concluded?
- A. The second antibiotic is bactericidal
- B. The first antibiotic is more effective, if concentrations are equal
- C. The first has killed the disc
- D. Both are equally effective
4. Which action by hospital staff best reduces selection for antibiotic resistance?
- A. Using alcohol gel
- B. Isolating patients
- C. Prescribing antibiotics only when needed
- D. Wearing aprons
5. Why does the use of a broad-spectrum antibiotic increase the risk of C. difficile infection?
- A. It stimulates C. difficile to make spores
- B. It kills gut flora, removing competition for C. difficile
- C. It increases stomach acid
- D. It makes C. difficile less resistant