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LABCE REVIEW QUESTIONS AND ANSWERS
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LABCE REVIEW QUESTIONS AND ANSWERS
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LABCE REVIEW QUESTIONS AND ANSWERSWhich alpha thalassemia shows no anemia, although a slight decrease in the MCV and
MCHC may be seen? - Answers- Alpha Thalassemia silent carrier
What MINIMUM level of a particular factor will cause the APTT test to become
PROLONGED ? - Answers- Less than 40%
Which abnormal morphologic terms describes this slide ? - Answers- Dohle Bodies,
bacteria, Toxic Granulation
Light yellow green pigmentation of the mycelium is observed, the identification of the
isolate depends on the presentation of the fruiting body observed in the bottom
photomicrograph. - Answers- Absidia species
What is the approximate time that should be allowed for samples to completely clot
before centrifugation for serum samples ? - Answers- 20 Minutes
Which has the longest half-life? - Answers- Phenobarbital (70-100 hours)
Which of the following parasites has the egg as the infective stage pf the parasite for
humans ? - Answers- Enterobius vermicularis
The patient CBC results were notably abnormal with 30% blast along with Anemia and
Thrombocytopenia. Bone Marrow and cytochemical testing were subsequently
performed. The cytochemical statins noted
Myeloperoxidase - NEGATIVE
Sudan Black B - NEGATIVE
Alpha- Naphthyl Acetate - POSITIVE - Answers- AML ( ACUTE MONOCYTIC
LEUKEMIA )
Myeloperoxidase - POSITIVE
Sudan Black B - POSITIVE
Alpha- Naphthyl Acetate - NEGATIVE - Answers- ACUTE PROMYELOCYTIC
LEUKEMIA (M3)
Most suitable specimen for the isolation of Bordetella pertusis ? - Answers-
Nasopharyngeal swab
Utilizing a Prussian Blue stain, which of the following red blood cell inclusions would be
identifiable if present ? - Answers- Pappenheimer (siderotic) bodies
5% Sheep blood agar plate inoculated with a throat culture. It is a common practice to
stab the agar with the inoculating needle, as seen in the tip of the arrow, in order to
detect or accentuate the reaction of - Answers- Streptolysin O ( S.pyogenes)
,True statement regarding Peak Level in the therapeutic drug monitoring. - Answers-
Peak Level is the point at which the drug is the highest in the patients body
Blood samples for CBC are collected on the morning rounds and stored in a rack in the
phleb basket. When the phleb delivers the samples to your work station, the cells and
plasma in the samples have separated.
One of the samples has LIPEMIC PLASMA. Which of the following parameters may be
affected by the lipemia? - Answers- MCHC
What is HEMIACETYL ? - Answers- A compound with both a carbonyl and alcohol
group
Most common methods for measuring bilirubin are based in the reaction of bilirubin with
? - Answers- Diazo Reaction
Which of the following conditions would produce the results listed below in an anemic
patient?
MCV - 115 fL
MCH - 30 pg
MCHC - 34% - Answers- Pernicious Anemia (Macrocytic Anemia)
Sickle Cell Anemia, Aplastic Anemia and Iron Deficiency Anemia ALL are Microcytic or
Normocytic Anemia
What is the focus of both Lean Principles and the Six Sigma Methodology? - Answers-
Process Improvement
RNA nucleotides - Answers- Uracil, Adenine, Cytosine, Guanine
After an Acute Myocardial Infraction, Myoglobin levels will rise within 3 hours and peak
at 8-12 hours. When will they return to normal ? - Answers- 18-30 hours
What causes Polyacrylamide Gels to have a greater resolution of proteins than agarose
gels ? - Answers- Varying pore size in each polyacrylamide layer
Describe cestodes - Answers- Adults are ribbonlike and contain segments
Infection control measure above and beyond standard precautions should be used by
the healthcare worker who will be collecting a blood specimen for a TB patient ? -
Answers- Respiratory protection control
HIPAA stands for? - Answers- Health Insurance Portability and Accountability Act
Universal Donor when transfusing Red Blood Cells ? - Answers- Group O
, skin and mucous membranes are important components of what part of Immune
System ? - Answers- Innate Immunity
A culture was performed on a stool sample, after growth was obtained on the blood agar
plate, the gram stain showed curved gram negative rods. The Oxidase, Catalase, and
Urease were POSITIVE. What is the most likely bacterial identification? - Answers-
Helicobacter pylori
The best sample to obtain in order to diagnosis the parasite causing the posterior scalp
nodule as illustrated in the photograph is - Answers- Superficial skin snip
Which of the following needle gauges has the smallest lumen or bore? - Answers- 22
What should be done FIRST if a donor unit of red blood cells is found to be incompatible
at the antiglobulin phase but compatible at immediate spin with several different
recipients? - Answers- Perform a direct antiglobulin test (DAT) on the donor unit
An urinalysis is commonly performed to detect bacteriuria or pyuria. In an urinalysis,
tests are performed that serves as a method of screening for urinary tract infections.
Which of following tests detect bacteria that produces enzymes to reduce nitrate? -
Answers- Nitrate reduction test
An acid-fast bacillus recovered from a post-surgery wound of a young child had the
following characteristics:
Rapid growth (3-5 days) on blood and chocolate agar
Nitrate positive
Niacin negative
Urease positive
Catalase 68ºC positive
Iron uptake positive
Which of the following Mycobacterium species does this represent? - Answers-
Mycobacterium fortuitum
The study of how variations in the human genome affect a given individual's response to
medications is called? - Answers- Pharmacogenomics (Pharmacogenetics)
In the clinical laboratory, Safety Data Sheets (SDS) shall be maintained and be
available to employees in the: - Answers- Workplace area
Which of the following organisms shows a characteristic "test tube brush-like" pattern at
22 degrees Celsius? - Answers- Erysipelothrix rhusiopathiae
To determine if an elevated aPTT is caused by a factor deficiency or a factor inhibitor
when the PT is normal, the FIRST step would be: - Answers- Mix one part patient
plasma and one part normal pooled plasma and repeat the aPTT
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