New Quiz

[A bone marrow specimen was obtained from an immunocompromised patient who tested positive for HIV. The organism grew rapidly at 3 days showing a mold form (at 25°C), displaying conidiophores with four to five terminal metulae with each having four to six phialides. The conidia at the end of the phialides were oval and in short chains. They appear as a fan or broom when viewing under 10× and 40×. At 37°C, the yeast
form grew more slowly, showing conidia that formed hyphal elements breaking at the septa to produce oval arthroconidia. This thermodimorphic mold is most likely:]

[Cerebrospinal fluid (CSF) should be cultured immediately, but if delayed the specimen
should be:]

[Which of the following is likely to occur first in iron deficiency anemia?]

[What staining method is used most frequently to stain and manually count reticulocytes?]

[Plasminogen deficiency is associated with:]

[Tinea versicolor is a skin infection caused by:]

[A rapidly growing nonseptate mold produced colonies with a gray surface resembling cotton candy that covered the entire plate. Microscopic examination revealed sporangiophores arising between, not opposite, the rhizoids and producing pear-shaped sporangia. What is the most likely identification?]

[A patient presents to the emergency department with symptoms of intoxication including impaired speech and movement. The plasma osmolality was measured and found to be 330 mOs/kg. The osmolal gap was 40 mOsm/Kg. A blood alcohol was measured by the alcohol dehydrogenase method and found to be 0.15% w/v (150 mg/dL). Electrolyte results showed an increased anion gap. Ethylene glycol intoxication was suspected because the osmolal gap was greater than could be explained by ethanol alone, but gas chromatography was not available. Which of the following would be
abnormal if this suspicion proved correct?]

[Which of the following is a description of a type I hypersensitivity reaction?]

[CML is distinguished from leukemoid reaction by which of the following?]

[Plate 45 is from a Wright’s-stained peripheral blood film, 1,000×. Sixty percent of the WBCs are positive for naphthol AS-D chloroacetate esterase (specific esterase), and 70% are positive for α-naphthyl acetate esterase (nonspecific esterase). The WBCs in this plate are characteristic of which FAB subtype of acute nonlymphocytic leukemia?]

[A 50-year-old man has been on heparin for the past 7 days. Which combination of the tests is expected to be abnormal?]

[The aseptic collection of blood cultures requires that the skin be cleansed with:]

[Select the correct order of Hgb migration on agarose or cellulose acetate at pH 8.6.]

[A bleeding-time test detects:]

[A small, gram-negative coccobacillus recovered from the CSF of a 2-year-old child gave the following results:
Indole = + Glucose = + (acid)
X requirement = + V requirement = +
Urease = + Lactose = Neg
Sucrose = Neg Hemolysis = Neg
Which is the most likely identification?]

[Which of the following complications are associated with arterial puncture?]

[What causes evacuated tubes to fill with blood automatically?]

[BUN is determined electrochemically by coupling the urease reaction to measurement of:]

[A patient with joint swelling and pain tested negative for serum RF by both latex agglutination and ELISA methods. What other test would help establish a diagnosis of RA in this patient?]

[An immunocompromised patient with prior antibiotic treatment grew aerobic gram-positive cocci from several clinical specimens that were cultured. The organism was vancomycin resistant and catalase negative. Additional testing proved negative for enterococci. What other groups of organisms might be responsible?]

[Urinary HVA is most often assayed to detect:]

[Which of the following statements regarding serous fluids is true?]

[Which enzyme deficiency is responsible for phenylketonuria (PKU)?]

[Plate 21 is a modified acid-fast stain with malachite green counterstain of a stool specimen, 1,000× magnification. The oocysts seen in this field are approximately 5 μ in diameter. Which organism is present?]

[The ova of which parasite may be found in the urinary sediment?]

[Which of the following conditions is most likely to cause a falsely low L/S ratio?]

[A patient with partially compensated respiratory alkalosis would have a urine pH of:]

[From the following, identify a specific component of the adaptive immune system that is formed in response to antigenic stimulation:]

[A chemistry profile that includes electrolytes, glucose, blood urea nitrogen (BUN), and
creatinine is ordered on an 80-year-old woman with symptoms of vomiting and dizziness. How should the laboratory submit the charge for these tests for reimbursement by Medicare?]