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6. Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni?

A. Vacomycin
B. Polymyxin
C. Trimethoprim
D. None of these

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7. To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of

A. 8.5
B. 8.90
C. 6.79
D. 3.5

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8. For the selection of endospore-forming bacteria, a mixed culture can be heated at

A. 80°C for 10 minutes
B. 70°C for 10 minutes
C. 60°C for 10 minutes
D. 90°C for 10 minutes

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9. The concentration of agar to obtain semi solid media is

A. 1.5-20%
B. 0.5% or less
C. >10%
D. >10%but<20%

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10. Which of the following bacteria dies quickly after drying?

A. Treponema pallidium
B. Mycobacterium tuberculosis
C. Staphylococcus aureus
D. Pseudomonas aeruginosa

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