Welcome to your MLT- Professional Name: Email: Phone Number: [Which of the following conditions is classified as normochloremic acidosis?] Diabetic ketoacidosis Chronic pulmonary obstruction Uremic acidosis Diarrhea None . [A positive glucose oxidase test and a negative test for reducing sugars indicates:] True glycosuria False-positive reagent strip test False-negative reducing test caused by ascorbate Galactosuria None . [All of the following are reasons for performing an adsorption, except:] Separation of mixtures of antibodies Removal of interfering substances Confirmation of weak antigens on red cells Identification of antibodies causing a positive DAT None . [A hyaline mold recovered from a patient with AIDS produced rose-colored colonies with lavender centers on Sabouraud dextrose agar. Microscopic examination showed multiseptate macroconidia appearing as sickles or canoes. What is the most likely identification?] Fusarium spp. Wangiella spp. Exophiala spp. Phialophora spp. None . [In myelofibrosis, the characteristic abnormal red blood cell morphology is that of:] Target cells Schistocytes Teardrop cells Ovalocytes None . [Which explanation is the best interpretation of the following BUN bias plot? (fig)] The new method consistently overestimates the BUN by a constant concentration The new method is greater than the reference method but not by a statistically significant margin The new method is lower than the reference method by 5 mg/dL The new method is lower than the reference and the magnitude is concentration dependent None Comment . [A CSF sample obtained from a 2-week old infant with suspected bacterial meningitis grew gram-negative rods on blood and chocolate agars. The following results were noted: MacConkey agar = No growth ONPG = + Glucose (open) OF = + Urease = Neg Glucose (closed) OF = Neg Catalase = + Indole = + Oxidase = + Motility = Neg Pigment = Yellow 42° C growth = Neg What is the correct identification?] Pseudomonas aeruginosa Chryseobacterium meningosepticum Acinetobacter baumannii E. coli None . [Which procedure is appropriate for culture of genital specimens in order to recover Chlamydia spp.?] Inoculate cycloheximide-treated McCoy cells Plate onto blood and chocolate agar Inoculate into thioglycollate (THIO) broth Plate onto modified Thayer–Martin agar within None . [Which substance has the longest detection time?] Amphetamines Cocaine Benzodiazepines Marijuana None . [Normal platelet adhesion depends upon:] Fibrinogen Glycoprotein Ib Glycoprotein IIb, IIIa complex Calcium None . [You are in the process of collecting a specimen by venipuncture. You hear a hissing sound, there is a spurt of blood into the tube, and blood flow stops. What has most likely happened? ] Reflux of tube contents. The needle went too deep. The vein has collapsed. Tube vacuum escaped. None . [A patient’s peripheral blood smear and bone marrow both show 70% blasts. These cells are negative for Sudan Black B stain. Given these data, which of the following is the most likely diagnosis?] Acute myeloid leukemia Chronic lymphocytic leukemia Acute promyelocytic leukemia Acute lymphocytic leukemia None . [Which is most likely a positive Western blot result for infection with HIV?] Band at p24 Band at gp60 Bands at p24 and p31 Bands at p24 and gp120 None . [Highest-resolution HLA typing is needed for which of the following transplants?] Heart Liver Kidney Bone marrow None . [Plate 33 is from a Wright’s-stained peripheral blood film, 400×. Which of the following tests may be performed to enable an accurate diagnosis?] Leukocyte alkaline phosphatase (LAP) stain Myeloid marker study by flow cytometry Myeloperoxidase stain Periodic acid–Schiff (PAS) stain None Comment . [All tubes (dilutions) except the negative control are positive for cold agglutinins. This indicates:] Contaminated red cells A rare antibody against red cell antigens The sample was stored at 4°C prior to separating serum and cells Further serial dilution is necessary None . [Plate 18 is a peripheral blood film stained with Giemsa’s stain, 1,000×. What condition is suspected from this field?] Macrocytic anemia Agranulocytosis Relapsing fever Lead poisoning None Comment . [p21 is a GTP binding protein produced by which oncogene?] RET Ras HER-2/neu N-Myc None . [Which group of streptococci is associated with erythrogenic toxin production?] Group A Group B Group C Group G None . [Which of the following statements is true?] Cystatin C is measured immunochemically The calibrator used for cystatin C is traceable to the National Bureau of Standards calibrator Cystatin C assays have a lower coefficient of variation than plasma creatinine Enzymatic and rate Jaffe reactions for creatinine give comparable results None . [When comparing the laboratory’s monthly mean to its peer group to determine if bias is present, what statistic is most appropriate?] F test Linear regression analysis Correlation coefficient Standard deviation index None . [Which of the following is associated with an abnormal platelet aggregation test?] Factor VIII deficiency Factor VIII inhibitor Lupus anticoagulant Afibrinogenemia None . Blood for electrolytes was drawn above an IV Serum sample was hemolyzed Venous blood was sampled for arterial blood gases Blood gas sample was exposed to air None Comment . [An IFE revealed excessive amounts of polyclonal IgM and low concentrations of IgG and IgA. What is the most likely explanation of these findings and the best course of action?] Proper amounts of antisera were not added; repeat both tests Test specimen was not added properly; repeat both procedures Patient has common variable immunodeficiency; perform B-cell count Patient has immunodeficiency with hyper-M; perform immunoglobulin levels None . [Can an autologous donor donate blood on Monday, if he is having surgery on Friday?] Yes, he or she can donate up to 72 hours before surgery No, he or she cannot donate with 7 days of surgery Yes, he or she can donate, but only a half a unit No, he or she cannot donate within 5 days of surgery None . [S. pneumoniae and the viridans streptococci can be differentiated by which test?] Optochin disk test, 5 μg/mL or less Bacitracin disk test, 0.04 unit CAMP test Bile esculin test None . [Antimicrobial susceptibility testing of anaerobes is done by which of the following methods?] Broth disk elution Disk agar diffusion Microtube broth dilution β-Lactamase testing None . [A national organization that develops guidelines and sets standards for laboratory procedures is the:] CAP. CLIAC. CLSI. NAACLS. None . [What are the likely laboratory findings in a person suspected of having Wilson’s disease?] Blood copper and ceruloplasmin low, urinary copper excretion high Blood and urine copper concentration high, ceruloplasmin low Blood and urine copper concentration high, ceruloplasmin high Blood and urine copper concentration low, ceruloplasmin low None . [Which analyte should be reported as a ratio using creatinine concentration as a reference?] Urinary microalbumin Urinary estriol Urinary sodium Urinary urea None . Time's up
