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LABCE EXAM QUESTIONS AND ANSWERS
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LABCE EXAM QUESTIONS AND ANSWERS
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LABCE EXAM QUESTIONS AND ANSWERSWhat should be done FIRST if a donor unit is found to be incompatible at the
antiglobulin phase with several different recipients?
A) Repeat the ABO grouping on the incompatible unit using different sera
B) Do a panel made up of red cells having all low-frequency antigens
C) Perform a direct antiglobulin test (DAT) on the donor unit
D) Obtain a new specimen and repeat the minor cross match - Answers- C
Recovered from a sputum sample, this suspicious form measures 112 micro meters by
55 micro meters.
Please select the single best answer
A) Schistosoma mansoni egg
B) Paragonimus westermani egg
C) Pneumocystis carinii cyst
D) Diphyllobothrium latum egg - Answers- B
Illustrated in the photomicrograph is the tail portion of an adult worm of a filarial
nematode. Human infections with this nematode are more commonly found among
those living in Southeast Asia, but may be observed in recent travelers there and to
surrounding regions. These adult worms measure up to 300 um, occupy lymphatic
channels and may cause lymphatic obstruction. Varying degrees of fever and chills may
be experienced. The species indicated in this exercise by the orientation of nuclei within
the tail section (arrows), more commonly involves the lymphatics of the genital tract
resulting in orchitis and hydrocele. From the nematode species listed below, indicate the
most likely species identification.
Please select the single best answer
A) Brugia malayi
B) Wuchereria bancrofti
C) Loa loa
D) Dirofilaria immitis - Answers- B
The colonies shown in the upper image were obtained on blood agar from a sputum
specimen after 10 days incubation at 30°C. The lower image is a photomicrograph of a
lactophenol blue mount made from a portion of the colony. The diagnosis is most likely:
Please select the single best answer
A) Coccidioidomycosis
B) Blastomycosis
C) Histoplasmosis
D) Paracoccidiodomycosis - Answers- C
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:
Please select the single best answer
,A) mix 1 part patient plasma and 1 part normal reagent (pooled) plasma and repeat the
APTT
B) mix 1 part patient plasma and 1 part normal aged plasma and repeat the PT
C) perform a Factor X assay to see if it is a Factor X deficiency
D) perform a test for a lupus anticoagulant - Answers-
This non-hemolytic Streptococcus was isolated from the blood culture of a patient
recently diagnosed with colon cancer. The image below demonstrates 6.5% NaCl broth
and bile esculin agar. With further testing, this isolate will most likely be identified as:
Please select the single best answer
A) Streptococcus pneumoniae
B) Enterococcus spp.
C) Streptococcus pyogenes
D) Streptococcus bovis - Answers- D
Normal adult CSF may have 0-5 white blood cells (WBCs)/µL. Which of the following
cell types account for 60-100% of these WBCs?
Please select the single best answer
A) Neutrophils
B) Lymphocytes
C) Monocytes
D) Eosinophils - Answers- B
Upon reviewing a fecal preparation for Ova and Parasites, a technologist thought
he/she had just identified the egg of Taenia saginata. After a quick look, the
Microbiology supervisor reminded the technologist that T. saginata eggs are
indistinguishable from which of the following?
Please select the single best answer
A) Dipyllidium caninum
B) Echinococcus granulosus
C) Hymenolepsis diminuta
D) Taenia solium - Answers- D
The term pharmacokinetic BEST describes:
The correct answer is highlighted below
A) What the drug does to the body
B) Concentration of drug at its sites of action
C) What the body does to the drug
D) None of the above answers are correct. - Answers- C
Identify the urine sediment elements present in this acidic urine:
Please select the single best answer
A) Cholesterol crystals
B) Uric acid crystals
C) Amorphous urate crystals
D) Cystine crystals - Answers- C
, When evaluating the throughput of a particular method you should consider all of the
following except:
Please select the single best answer
A) Calibration requirements
B) Sensitivity of technique
C) Reagent preparation time
D) Calculations required to complete test - Answers- B
In order to correctly prepare a 4M solution of NaOH, how many grams need to be added
to 200mL of solution? (GMW=40)
Please select the single best answer
A) 32 grams
B) 200 grams
C) 80 grams
D) 20 grams - Answers- A
Warfarin-based (coumarin derivative) oral anti-coagulant therapy is commonly
monitored with :
Please select the single best answer
A) APTT
B) PT/INR
C) APTT and PT
D) Thrombin time - Answers- B
Which one of the following red blood cell phenotypes will NOT react with Anti-Fy3?
Please select the single best answer
A) Fy(a+b+)
B) Fy(a+b-)
C) Fy(a--b+)
D) Fy(a--b-) - Answers- D
Cystine-tellurite blood agar is recommended for the isolation of which organism?
Please select the single best answer
A) Yersinia enterocolitica
B) Legionella pneumophilia
C) Corynebacterium diphtheriae
D) Francisella tularensis - Answers- C
The fungus illustrated in this photomicrograph was recovered from an induced sputum
specimen from a 74 year old man with chronic obstructive pulmonary disease. This
isolate is most likely:
The correct answer is highlighted below
A) The cause of chronic bronchitis
B) The cause of invasive pulmonary disease
C) The cause of allergic bronchopulmonary disease
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