Question 61
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Provide the equivalent measurement for one pint.
Answer:
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Question 62
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One agency that accredits education programs for clinical laboratory personnel is the:
Answer:
Question 63
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Howell-Jolly bodies are composed of DNA, usually left from the nucleus, that appears as a round, dark-staining inclusion in the cytoplasm of red blood cells. Howell-Jolly bodies can be found in various conditions including splenectomy and anemia.
Remnants of erythrocyte nuclei, nuclear fragments, or aggregates of chromosomes are called:
Remnants of erythrocyte nuclei, nuclear fragments, or aggregates of chromosomes are called:
Answer:
Question 64
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This patient is most likely suffering from sickle cell anemia. This cell, which is sickle-shaped, is indicative of the presence of hemoglobin S. Polychromasia is also commonly observed in sickle cell anemia.
After experiencing crippling pain in her chest, Elizabeth's mother rushes her to the Emergency Room. After a complete blood count and differential are ordered, the hematology technologist views many peripheral cells similar in appearance to those found in the image below.
Which condition is most likely present?
After experiencing crippling pain in her chest, Elizabeth's mother rushes her to the Emergency Room. After a complete blood count and differential are ordered, the hematology technologist views many peripheral cells similar in appearance to those found in the image below.
Which condition is most likely present?
Answer:
Question 65
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To make a 1 : 10 dilution, 270 µL of diluent should be added to 30 µL of sample, .
A spinal fluid that is slightly hazy is briefly examined microscopically. The technologist performing the count decides to make a 1:10 dilution using 30 µL of sample.
What volume of diluent should be used?
A spinal fluid that is slightly hazy is briefly examined microscopically. The technologist performing the count decides to make a 1:10 dilution using 30 µL of sample.
What volume of diluent should be used?
Answer:
Question 66
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A cardiac risk profile is performed in:
Answer:
Question 67
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Most anticoagulants in blood collectiong tubes prevent clotting by:
Question options:
Question options:
Answer:
Question 68
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Escherichia coli and Klebsiella pneumoniae are two good quality control choices for the indole test.
E. coli is indole positive, while K. pneumoniae is indole negative. A positive reaction is noted when there is a red layer at the top of the tube after the addition of Kovács reagent, while the negative result is a lack of color change in the top of the tube after the addition of Kovács reagent.
Which one of the following combinations of organisms would be appropriate positive and negative controls to verify the specific test functions listed?
E. coli is indole positive, while K. pneumoniae is indole negative. A positive reaction is noted when there is a red layer at the top of the tube after the addition of Kovács reagent, while the negative result is a lack of color change in the top of the tube after the addition of Kovács reagent.
Which one of the following combinations of organisms would be appropriate positive and negative controls to verify the specific test functions listed?
Answer:
Question 69
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Because of the difficulty in culturing Epstein-Barr virus, and readily available heterophile antibody test and serology, it is rarely necessary to culture this virus in routine clinical practice.
Micro
Which one of the following viruses requires a complex lymphoblastoid cell culture, and is rarely if ever diagnosed by culture:
Micro
Which one of the following viruses requires a complex lymphoblastoid cell culture, and is rarely if ever diagnosed by culture:
Answer:
Question 70
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Joint pain is a common early symptom of HH. Cirrhosis of the liver, cardiomyopathy, and diabetes are late symptoms of HH.
What is a common early symptom of hereditary hemochromatosis (HH)?
What is a common early symptom of hereditary hemochromatosis (HH)?
Answer:
Question 71
Selectable Answer
The risk of HbS polymerization is enhanced by a low (acid) pH, a state of dehydration, and increased levels of 2,3-DPG. Increased temperature (above 37°C) also adds to the risk.
Hematology
Which group of conditions INCREASES the risk of HbS polymerization?
Hematology
Which group of conditions INCREASES the risk of HbS polymerization?
Answer:
Question 72
Selectable Answer
L/S ratio <2.0 indicates an increased risk of respiratory distress syndrome (RDS) at delivery. L/S ratio <1.5 indicates a very high risk of developing RDS.
Which of the following statements regarding the L/S ratio is TRUE?
The correct answer is highlighted below
A ratio of 2:1 or greater usually indicates adequate pulmonary surfactant to prevent respiratory distress syndrome (RDS)
A ratio of 1.5:1 indicates fetal lung maturity in pregnancies associated with diabetes mellitus.
Sphingomyelin levels increase during the 3rd trimester causing the L/S ratio to fall slightly during the last two weeks of gestation.
A phosphatidylglycerol (PG) spot indicates the presence of meconium in the amniotic fluid
Lecithin is in direct ratio with sphingomyelin
Heparin contamination is characterized by an elevation in the aPTT test and can also cause an increased PT test as well. Reptilase time tests are used to elimate the effects of heparin contamination as the reagents and method are resistant to the effects of antithrombin III, unlike the PT and aPTT tests. Therefore, it would be expected that a patient sample containing pre-analytical heparin contamination will show an increased aPTT (and sometimes PT as well) while showing a normal reptilase time.
A specimen drawn from an indwelling catheter that was contaminated by heparin would be indicated by:
Which of the following statements regarding the L/S ratio is TRUE?
The correct answer is highlighted below
A ratio of 2:1 or greater usually indicates adequate pulmonary surfactant to prevent respiratory distress syndrome (RDS)
A ratio of 1.5:1 indicates fetal lung maturity in pregnancies associated with diabetes mellitus.
Sphingomyelin levels increase during the 3rd trimester causing the L/S ratio to fall slightly during the last two weeks of gestation.
A phosphatidylglycerol (PG) spot indicates the presence of meconium in the amniotic fluid
Lecithin is in direct ratio with sphingomyelin
Heparin contamination is characterized by an elevation in the aPTT test and can also cause an increased PT test as well. Reptilase time tests are used to elimate the effects of heparin contamination as the reagents and method are resistant to the effects of antithrombin III, unlike the PT and aPTT tests. Therefore, it would be expected that a patient sample containing pre-analytical heparin contamination will show an increased aPTT (and sometimes PT as well) while showing a normal reptilase time.
A specimen drawn from an indwelling catheter that was contaminated by heparin would be indicated by:
Answer:
Question 73
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A patient with influenza would be placed in:
Answer:
Question 74
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Bacitracin susceptibility is a presumptive test for the identification of Lancefield group A Streptococcus.
Which of the following is a presumptive test for the identification of Lancefield group A Streptococcus:
Which of the following is a presumptive test for the identification of Lancefield group A Streptococcus:
Answer:
Question 75
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Enterococcus spp. are bile esculin positive and grow in 6.5% NaCl. If they grow on the 6 µg/mL vancomycin screen agar as this isolate does, it is vancomycin resistant. If there is no growth on the 6 µg/mL vancomycin screen agar, the isolate is susceptible to vancomycin. Streptococcus Group D, not Enterococcus will not grow in the 6.5% NaCl and should not be tested for vancomycin resistance. Staphylococcus epidermidis is catalase positive.
The images below represent a gram-positive, catalase-negative, non-motile coccus inoculated to bile esculin agar, 6.5% NaCl broth and to 6 µg/mL of vancomycin in Mueller Hinton agar. It should be reported as:
The images below represent a gram-positive, catalase-negative, non-motile coccus inoculated to bile esculin agar, 6.5% NaCl broth and to 6 µg/mL of vancomycin in Mueller Hinton agar. It should be reported as:
Answer:
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