MLT ASCP BOARD EXAM LATEST 2024 ACTUAL
EXAM 200 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A
Illustrated in the top photograph are acid-fast bacilli as they may appear in acid-fast stains prepared
from a direct mount of infected tissue. These acid fast bacilli are thin, slightly curved, red-pigmented and
beaded. The acid fast bacilli, as illustrated in the bottom photograph, aggregate in serpentine chords in
stained mounts prepared from colonies growing on agar. From these observations, select the
presumptive identification of this mycobacterium. - ANSWER-Mycobacterium tuberculosis
The predominant cells seen on the CSF smear in this illustration are indicative of: - ANSWER-Bacterial
meningitis
A newborn presents with neonatal alloimmune thrombocytopenia. What is the most likely cause of this
condition? - ANSWER-Maternal antibodies to neonatal platelet antigens
A lipid panel consists of which of the following tests? - ANSWER-Cholesterol, Lipoprotein, HDL,
Triglycerides
Antibodies of which of the following immunoglobulin subclasses is predominantly associated with the
secondary antibody response? - ANSWER-IgG
Which of the following would be the most appropriate temperature for long term storage of specimens
for viral culture? - ANSWER--70° C
Which of the following situations warrants postpartum administration of Rh immune globulin (RhIg)? -
ANSWER-Mother: D negative; Cord: D positive
A tech is working with a large, spore-forming, Gram-positive bacillus that they believe is Bacillus spp.
Which of the following tests could the tech use to ensure this organism is not Bacillus anthracis? -
ANSWER-Motility positive
,Which modified PCR technique or other method of amplification is used to detect Mycobacterium
tuberculosis? - ANSWER-Transcription-Mediated Amplification
The following stain reactions were resulted on a suspected case of leukemia:
Myeloperoxidase +
Sudan Black B +
Chloroacetate Esterase +
Nonspecific Esterases -
Which of the following is the correct interpretation? - ANSWER-Acute Myelocytic Leukemia
If one finds excessive rouleaux formation on a blood smear examination, then which of the following
parameters might also be increased? - ANSWER-Erythrocyte sedimentation rate
Which of the following drugs is listed as an anti-convulsants? - ANSWER-Phenobarbital
This image is a protozoan in the cyst stage of development. Identify this cyst. - ANSWER-Chilomastix
mesnili cyst
they are lemon or pear-shaped with a hyaline knob. They only have one nucleus and a curved fibril
alongside the cytostome, often called the "shepherd's crook."
Illustrated in the upper image is a cercaria capable of penetrating the skin of a human swimming in
contaminated water. These cercaria then enter the circulation, and mature in the portal vascular system
where they develop into adult flukes. Distinctively the female flukes occupy the gynecophoral canal of
the male fluke, as illustrated in the lower image. From the list of trematode genera, select the genus
that represents these stages of this life cycle. - ANSWER-Schistosoma
Which procedure should be followed when one cross-matched unit out of five is INCOMPATIBLE at the
antiglobulin (AHG) phase? - ANSWER-Perform a direct antiglobulin test (DAT) on the incompatible unit
Which of the following is true regarding a normal distribution curve? - ANSWER-Data are more likely to
fall closer to the mean.
, Normal fecal specimens contain all of the following, EXCEPT: - ANSWER-Shigella
What are the usual results of the mean corpuscular volume (MCV) and the red cell distribution width
(RDW) in alpha thalassemia? - ANSWER-The MCV is decreased but the RDW is usually increased
An error is a verified and reported result on a patient that is later determined to be inaccurate. To
identify an error, reports can be reviewed, other microbiologists may locate the error through testing, or
nurses and physicians may come across the error when evaluating laboratory results. If an error is
detected by repetitive quality control testing, which may indicate probable erroneous patient results,
this is an example of which type of error detection? - ANSWER-Laboratory detection
Using an automated cell counter analyzer, an increased Red Cell Distribution Width (RDW) should
correlate with which of the following? - ANSWER-Anisocytosis
How long after hospitalization would stool samples be rejected for testing for parasitic infections? -
ANSWER-Greater than 72 hours
A normal hemoglobin molecule is comprised of the following: - ANSWER-Four heme and four globin
chains
Observe the peripheral blood smear image to the right. Several types of poikilocytes are seen. All of the
following are seen in the image EXCEPT? - ANSWER-Drepanocyte - Sickle cells are half-moon-shaped
cells with pointy ends.
A patient reported to her doctor that her stools have been ribbon-like over the last few weeks. What is
most likely the cause of the patient's stool appearance? - ANSWER-Bowel obstruction
What is the required storage temperature for thawed cryoprecipitate? - ANSWER-20 - 24 ºC.
Which of the following morphologic structures for Giardia intestinalis trophozoite is pictured in the
section labeled B? - ANSWER-Axonemes
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