Welcome to your MLT- Professional Name: Email: Phone Number: [Which of the following organisms accounts for the majority of septic arthritis cases in young and middle-age adults?] H. influenzae Neisseria gonorrhoeae Staphylococcus aureus Borrelia burgdorferi None . [Mean cell volume (MCV) is calculated using the following formula:] (Hgb ÷ RBC) × 10 (Hct ÷ RBC) × 10 (Hct ÷ Hgb) × 100 (Hgb ÷ RBC) × 100 None . [Which of the following is the reference method for measuring serum glucose?] Somogyi–Nelson Hexokinase Glucose oxidase Glucose dehydrogenase None . [All of the following are associated with intravascular hemolysis except:] Methemoglobinemia Hemoglobinuria Hemoglobinemia Decreased haptoglobin None . [A suspected Bacillus anthracis culture obtained from a wound specimen produced colonies that had many outgrowths (Medusa-head appearance), but were not β-hemolytic on sheep blood agar. Which test should be performed next?] Penicillin (10-unit) susceptibility test Lecithinase test Glucose test Motility test None . [Which of the following is often associated with CML but not with AML?] Infections WBCs greater than 20.0 × 10^9/L Hemorrhage Splenomegaly None Comment . [Select the five pharmacological parameters that determine serum drug concentration.] Absorption, anabolism, perfusion, bioactivation, excretion Liberation, equilibration, biotransformation, reabsorption, elimination Liberation, absorption, distribution, metabolism, excretion Ingestion, conjugation, integration, metabolism, elimination None . [T cells travel from the bone marrow to the thymus for maturation. What is the correct order of the maturation sequence for T cells in the thymus?] Bone marrow to the cortex; after thymic education, released back to peripheral circulation Maturation and selection occur in the cortex; migration to the medulla; release of mature T cells to secondary lymphoid organs Storage in either the cortex or medulla; release of T cells into the peripheral circulation Activation and selection occur in the medulla; mature T cells are stored in the cortex until activated by antigen None . [Which type of patient is most likely to have an arteriovenous fistula or graft?] Arthritic Dialysis Hospice Wheelchair-bound None . [Which one of the following is used as a monitor or quality indicator for the process of “test requesting”?] Employee safety Ordering accuracy Stat transit time Wristband evaluation None . [A panel study has revealed the presence of patient alloantibodies. What is the first step in a major crossmatch?] Perform a DAT on patient cells and donor units Antigen type patient cells and any donor cells to be crossmatched Adsorb any antibodies from the patient serum Obtain a different enhancement medium for testing None . [According to American Diabetes Association criteria, which result is consistent with a diagnosis of impaired fasting glucose?] 99 mg/dL 117 mg/dL 126 mg/dL 135 mg/dL None . [Which of the following platelet aggregating agents demonstrates a monophasic aggregation curve when used in optimal concentration?] Thrombin Collagen Adenosine diphosphate (ADP) Epinephrine None . [Which of the following viruses is implicated along with Epstein–Barr virus as a cause of infectious mononucleosis?] Cytomegalovirus (CMV) Coxsackie A virus Coxsackie B virus Hepatitis B virus None . [SITUATION: A pregnant female was seen by her physician who suspected a molar pregnancy. An hCG test was ordered and found to be low. The sample was diluted 10-fold and the assay was repeated. The result was found to be grossly elevated. What best explains this situation?] The wrong specimen was diluted A pipeting error was made in the first analysis Antigen excess caused a falsely low result in the undiluted sample An inhibitor of the antigen–antibody reaction was present in the sample None . [In testing for DiGeorge’s syndrome, what type of laboratory analysis would be most helpful in determining the number of mature T cells?] Complete blood count Nitroblue tetrazolium (NBT) test T-cell enzyme assays Flow cytometry None . [What is the most likely explanation when a patient has clinical signs of viral hepatitis but tests negative for hepatitis A IgM, hepatitis B surface antigen, and hepatitis C Ab?] Tests were performed improperly The patient does not have hepatitis The patient may be in the “core window” Clinical evaluation was performed improperly None . [Which statement regarding urea is true?] Urea is 100% filtered by the glomeruli Blood urea levels are independent of diet Urea is not significantly reabsorbed by the tubules Urea excretion is a specific measure of glomerular function None . [What can be done if HDN is caused by maternal anti-K?] Give Kell immune globulin Monitor the mother’s antibody level Prevent formation of K-positive cells in the fetus Not a problem; anti-K is not known to cause HDN None . [Bilirubin is transported from reticuloendothelial cells to the liver by:] Albumin Bilirubin-binding globulin Haptoglobin Transferrin None . [All of the following are routinely performed on a cord blood sample except:] Forward ABO typing Antibody screen Rh typing DAT None . [How soon following acute abdominal pain due to pancreatitis is the serum amylase expected to rise?] 1–2 hours 2–12 hours 3–4 days 5–6 days None . [SITUATION: Cells type negative for all HLA antigens in a complement-dependent cytotoxicity assay. What is the most likely cause?] Too much supravital dye was added Rabbit complement is inactivated All leukocytes are dead Antisera is too concentrated None . [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?] M1 M2 M3 M4 None Comment . [The term effusion refers to:] A chest fluid that is purulent A serous fluid that is chylous An increased volume of serous fluid An inflammatory process affecting the appearance of a serous fluid None . [SITUATION: A patient’s biochemistry results are: ALT = 55 IU/L AST = 165 IU/L glucose = 87 mg/dL LD = 340 IU/L Na = 142 mmol/L K = 6.8 mmol/L Ca = 8.4 mg/dL Pi = 7.2 mg/dL Select the best course of action.] Report results along with an estimate of the degree of hemolysis Repeat LD but report all other results Request a new sample Dilute the serum 1:2 and repeat AST and LD None . [How many milliliters of HNO3 (purity 68.0%, specific gravity 1.42) are needed to prepare 1.0 L of a 2.0 N solution? Atomic weights: H = 1.0; N = 14.0; O = 16.0] 89.5 mL 126.0 mL 130.5 mL 180.0 mL None . [Which immunofluorescence pattern indicates the need for ENA testing by Ouchterlony immunodiffusion, Multiplex, or ELISA assays?] Homogeneous or solid Peripheral or rim Speckled Nucleolar None . [Which test is the most sensitive in detecting early monoclonal gammopathies?] High-resolution serum protein electrophoresis Urinary electrophoresis for monoclonal light chains Capillary electrophoresis of serum and urine Serum-free light chain immunoassay None . [A 22-year-old pregnant woman (third trimester) entered the emergency department complaining of diarrhea, fever, and other flulike symptoms. Blood cultures were ordered along with a urine culture. After 24 hours, the urine culture was negative, but the blood cultures revealed a gram-positive short rod that grew aerobically on blood agar. The colonies were small and smooth, resembling a Streptococcus spp. with a small narrow zone of β-hemolysis. The following test results indicate which organism? Motility = + (Wet mount = Catalase = + Tumbling) Glucose = + (Acid) Esculin hydrolysis = +] Listeria monocytogenes Streptococcus pneumoniae Streptococcus agalactiae Corynebacterium spp. None . Time's up
