13-The Gasak anacrobic jar provides what environmenc? A. Oxygen free B. Bacteria

Question

13-The Gasak anacrobic jar provides what environmenc? A. Oxygen free B. Bacteria free C. Carbon dioxide free D. All of the above Use the diagram below to answer the question 34 and 35 34- The letters on the Mueller-Hinton II agar plate indicate specific antibiotics that were tested using the Kirby- Bauer method. Which antibiotic is the most effective against the bacteria? a) G b) A c) E d)C 35-The clear area around the antibiotic disk where no bacteria growth is observed is referred to as a. b. c. d. Zone of inhibition Lawn of bacteria Zone of resistance Zone of sensitivity 36- After doing a urine CFU analysis, in which you transferred 01 ml of your urine sample onto an agar plate, you counted 3,700 colonies in your plate. The number of organisms per milliliter of sample is a) 370 cells/mL b) 370,000 cells/mL c) 37000 cells/mL d) 37 cells/mL

Explanation / Answer

33) GasPak jar is useful in the creation of anaerobic environment. It is used in the culture of anaerobic bacteria such as clostridium, bacteroides and fusobacterium which will die in the presence of oxygen. Therefore, GasPak jar is used to create oxygen free environment (option A).

34) The antibiotic which has a larger halo (clear zone) around it is the most effective against bacteria. So, the effective antibiotic is E (option C).

35) The clear area around the antibiotic disc where no bacterial growth is observed is known as zone of inhibition (option a).

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