Review Questions for Quiz # 5 from Lesson Content 6 & 7 (10 MCQ)

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24 Terms

1
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Where can microbiology specimens be collected?

Microbiology specimens can be collected from various body areas such as throat, urine, blood, stool, and wounds.

2
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What are the common specimens collected for culture?

Throat swabs, urine, blood, stool, and respiratory specimens are common for culture.

3
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What are the sterile areas of the body that lack microbiota?

Sterile areas include the bloodstream, cerebrospinal fluid (CSF), and certain body cavities.

4
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Why do we collect throat specimens?

To test for Strep throat caused by Streptococcus pyogenes.

5
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Where should the label go when collecting specimens and what must be recorded?

The label should go on the container, recording patient information, specimen source, and date/time.

6
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What is the importance of writing the site of the specimen on the container?

It helps identify the origin of the specimen for accurate diagnosis and treatment.

7
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Is refrigeration effective for anaerobic organisms, CSF, or genital cultures if specimens cannot be cultured immediately?

No, these specimens should be stored at room temperature.

8
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What are the characteristics of group A streptococcus?

Group A streptococcus is typically beta-hemolytic, spherical, and can cause pharyngitis and skin infections.

9
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What is the common microorganism responsible for UTI and its characteristics?

Escherichia coli, a gram-negative rod, is commonly responsible for UTIs.

10
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What type of urine specimen is collected for culture and sensitivity (C&S)?

A clean-catch midstream urine specimen is collected for C&S.

11
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What culture media should urine specimens be inoculated on?

Urine specimens should be inoculated on media such as MacConkey agar and blood agar.

12
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What is a colony count and its clinical significance?

A colony count measures the number of bacteria in a culture; counts over 100,000 CFU/mL are typically significant for infection.

13
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What are the requirements for collecting respiratory specimens like sputum?

Collect the specimen in the morning, after deep coughing, in a sterile container.

14
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How can we tell if the sputum specimen is acceptable?

An acceptable sputum specimen has fewer than 10 squamous epithelial cells per low power field.

15
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What is clostridium difficile?

Clostridium difficile is a bacterium that can cause severe diarrhea and colitis, commonly associated with antibiotic use.

16
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What can you detect from fecal specimens?

Fecal specimens can detect pathogens such as bacteria, viruses, and parasites.

17
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What is the best method for finding pinworm organisms in children?

The tape test, where clear tape is applied to the anal area to collect eggs.

18
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What does O&P stand for?

O&P stands for Ova and Parasites.

19
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What is the fixative found in the jar for O&P stool?

The fixative is typically formalin.

20
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What containers can stool for O&P be collected in?

Stool for O&P can be collected in containers with preservative or in a clean, dry container.

21
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What is the flotation technique and what solutions are used?

The flotation technique uses sugar or salt solutions to separate parasites from fecal material.

22
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What is the sedimentation method?

The sedimentation method concentrates parasites by allowing fecal material to settle and collecting the sediment.

23
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What should be reviewed regarding blood cultures?

Blood cultures are essential for detecting bloodstream infections and must be collected using aseptic techniques.

24
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What is the most critical part of blood culture collection?

Proper aseptic technique during skin preparation and collection is the most critical part.