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Free ASCP ASCP-MLT Practice Exam with Questions & Answers | Set: 5

Questions 61

One of the key characteristics to the identification of Nocardia asteroides is its inability to hydrolyze casein, tyrosine or xanthine, as shown in this photograph. Nitrates are reduced to nitrites. Both Nocardia brasiliensis and Actinomadura madurae hydrolyze both casein and tyrosine; Streptomyces griseus hydrolyzes all three of the substrates.

Illustrated in this photograph is an agar quadrant plate containing casein (A), tyrosine (B), nitrate (C) and xanthine (D). None of the substrates have been hydrolyzed and nitrate has been reduced. The most likely identification is:

ASCP-MLT Question 61

Options:
A.

Nocardia asteroides

B.

Nocardia brasiliensis

C.

Streptomyces griseus

D.

Actinomadura madurae

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Questions 62

The laboratory employee with a 4-year college degree who performs clinical analysis is the:

Options:
A.

clinical laboratory assistant (CLA)

B.

phlebotomist

C.

clinical laboratory scientist (CLS) or medical laboratory scientist (MLS) in newer terminology or Medical Technologist (MT) in older terminology

D.

medical laboratory technician (MLT)

Questions 63

In sickle cell anemia, rapid hemoglobin turnover may be present. HbA1C and other glycated hemoglobin assays are not valid in rapid hemoglobin turnover and in abnormal hemoglobin conditions. Fructosamine measurements can be used because of shorter half life of albumin.

HbA1C measurements are NOT ordinarily used to monitor long-term diabetic control in a diabetic with sickle cell anemia.

Options:
A.

true

B.

false

Questions 64

The correct answer for this question is 1300 mg/dL. The laboratorian performed a 1:4 dilution by adding 0.25 mL (or 250 microliters) of patient sample to 750 microliters of diluent. This creates a total volume of 1000 microliters. So, the patient sample is 250 microliters of the 1000 microliter mixed sample, or a ratio of 1:4. Therefore, the result given by the chemistry analyzer must be multiplied by a dilution factor of 4. 325 mg/dL x 4 = 1300 mg/dL.

After experiencing extreme fatigue and polyuria, a patient's basic metabolic panel is analyzed in the laboratory. The result of the glucose is too high for the instrument to read. The laboratorian performs a dilution using 0.25 mL of patient sample to 750 microliters of diluent. The result now reads 325 mg/dL. How should the techologist report this patient's glucose result?

Options:
A.

325 mg/dL

B.

1300 mg/dL

C.

975 mg/dL

D.

1625 mg/dL

Questions 65

Provide the equivalent measurement for one pint.

Options:
A.

4.2 liters

B.

0.25 liters

C.

0.1 liter

D.

0.474 liters

Questions 66

Following an accidental needlestick, the person should be tested for all of the following except:

Options:
A.

human immunodeficiency virus (HIV)

B.

hepatitis C virus (HCV)

C.

hepatitis B virus (HBV)

D.

hepatitis A virus (HAV)

Questions 67

Transpeptidase enzymes catalyze the final stage of peptidoglycan synthesis during cell wall formation. Beta-lactam antibiotics bind with these enzymes, interfering with their function. The transpeptidase enzymes are also referred to as PBP's, or penicillin-binding proteins.

Beta-lactam antibiotics interfere with cell wall synthesis by:

Options:
A.

Binding with a transpeptidase

B.

Preventing the final stage of peptidoglycan synthesis

C.

Interfering with PBPs

D.

All of the above

Questions 68

Report the isolate as coagulase negative Staphylococcus is the correct answer because this is an isolate from a urine specimen with a coagulase negative Staphylococcus susceptible to novobiocin. Staphylococcus saprophyticus is resistant to novobiocin. Further testing is required to speciate coagulase negative Staphylococci but only if the specimen is from a sterile body site, not urine.

Gram positive cocci isolated from a catheterized urine culture on a 76-year-old male gave the following reactions:

Blood agar- creamy, white, opaque colonies

Catalase- positive

Slide coagulase- negative

Tube coagulase- negative

Novobiocin- susceptible

The next action the MLS should take is:

Options:
A.

Report the isolate as coagulase negative staphylococcus

B.

Report the isolate as Staphylococcus epidermidis

C.

Report the isolate as Staphylococcus saprophyticus

D.

Perform further testing to speciate the organism

Questions 69

An international, nonprofit organization that establishes standards of best current practice for clinical laboratories is

Options:
A.

Centers for Disease Control and Prevention (CDC)

B.

Commission on Office Laboratory Accreditation (COLA)

C.

Clinical Laboratory Standards Institute (CLSI)

D.

the Joint Commission

Questions 70

If your reactions are strong at immediate spin (3+) and then get weaker at AHG (w+), it could mean the presence of a strong cold antibody.

Cold antibodies tend to be IgM and their optimum phase for reactivity is immediate spin. Incubation and washing of the sample may cause the agglutination that occurred at room temperature to break down. This would appear as a weaker reaction at AHG.

If the reaction strengths varied in each panel cell then that could be an indication that there are multiple antibodies present.

Your screen cells are 3+ at immediate spin and weak (W)+ at AHG. Your auto control is negative for both phases. Some of your antibody panel cells are 3+ at immediate spin and negative at AHG. What should you suspect?

Options:
A.

A warm autoantibody is present

B.

A cold antibody may be present

C.

Bad specimen draw

Questions 71

First, the RBC indices must be calculated. The MCV ((Hct/RBC) x 10) = 71 fL. Since the reference range for the MCV is 80-100 fL, this anemia would be classified as microcytic. The MCH ((Hgb/RBC) x 10) = 19.3 pg. Since the reference range for the MCH is 27-33 pg, this would be considered hypochromic. Finally, the MCHC ((Hgb/Hct) X 100) = 27%. Since the normal range for the MCHC is 33%-36%, this would indicate hypochromia which correlates with the MCH findings. The correct answer is therefore microcytic, hypochromic anemia.

A patient is admitted to the emergency room with lethargy and pallor. The CBC results are as follows:

RBC = 4.1 x 1012/L

Hemoglobin = 7.9 g/cL

Hematocrit = 29%

How would you classify this anemia?

Options:
A.

microcytic, hypochromic

B.

normocytic, normochromic

C.

macrocytic, normochromic

D.

microcytic, hyperchromic

Questions 72

Failure to tightly seal specimens for sweat electrolytes during collection and transport will cause:

Options:
A.

decreased values due to exposure to air

B.

decreased values due to exposure to light

C.

increased values due to evaporation

D.

increased values due to cellular contamination

Questions 73

Donor and recipient blood samples (samples utilized for pre-transfusion compatibility testing) must be kept for at least 7 days after transfusion. Blood samples must be available to investigate a transfusion reaction, if necessary.

Donor and recipient blood samples must be kept for at least how long after transfusion?

Options:
A.

10 days

B.

7 days

C.

3 days

D.

Not a requirement

Questions 74

1+ reaction has numerous small clumps and cloudy red supernatant

2+ has many medium-sized clumps and clear supernatant.

3+ has several large clumps and clear supernatant

4+ has one solid clump, no free cells, and clear supernatant

BB

Tube-based agglutination reactions in blood bank are graded from negative (0) to 4+. A reaction that has numerous small clumps in a cloudy, red background is:

Options:
A.

1+

B.

2+

C.

3+

D.

4+

Questions 75

A patient with influenza would be placed in:

Options:
A.

airborne isolation.

B.

droplet isolation.

C.

protective isolation.

D.

body fluid isolation

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