43-A qualitative and quantitative urine Which of the following repultures report

Question

43-A qualitative and quantitative urine Which of the following repultures reported the presence of 80,000 colony forming units /ml of A. significant bacteriuria based on the numbers not significant bacteriuria based on the numbers The presence of any microbial growth determines there is an infection ), noue of the choices is correct Use the diagram below to answer the questions 4445 44-The letters on the Mueller-Hinton II agar plate indicate specific antibioties that were tested using the l Bauer method. Which antibiotic is the most effective against the bacterial? a) G b) A 45-The clear area around the antibiotic disk where no bacteria growth is observed is referred to as a) Zone of inhibition e. Zone of resistance d. Zone of sensitivity Lawn of bacteria 46- To cultivate fungi, a selective medium such as bacterial growth is ideal duc to its low pl a. Sabouraud agar b. Nutrient agar Mueller Hinton d. None of the above

Explanation / Answer

43. The answer is B. not significant bacteriuria based on the numbers.

Explanation:

Urine is normally sterile. During urine collection, some contamination from skin bacteria is frequent. For such a type of reason, upto 10,000 colonies of bacteria/ml are considered normal.

Greater than 100,000 colonies/ml represents urinary tract infection.

But, for the counts between 10000 and 100,000, the culture is supposed to be nonsignificant or indeterminate. Such a type of urine culture is supposed to be undefined.

44. The answer is E.

Explaination:

The antibiotic which shows large zone of inhibition where bacteria can not be grown due to the influence of antibiotic is said to be the most effective.

In the given picture of petri plate, the antibiotic E showed the larges area as compared to the other antibiotics, so, antibiotic E is the most effective.

45. The answer is a. Zone of inhibition.

Explanation

The clear area around the antibiotic disk where no bacteria is observed is reffered to as zone of inhibition because the growth of microorganisms is inhibited due to the influence of antibiotic in that zone.

When antibiotic is added to the well, it diffuses from the well to the specific area and restricts or inhibits the growth of microorganisms present in that area.

46. The answer is a. Sabouraud agar.

Explanation

Sabouraud agar is a selective medium used for the isolation of dermatophytes, other fungi and yeasts. The pH of this medium is acidic i.e. about 5.0 and so inhibits the growth of bacteria but permits the growth of yeasts and most of the filamentous fungi. Therefore, it is supposed to be the ideal medium.

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