New Quiz 10 Dec Welcome to your MLT- Professional Name: Email: Phone Number: [All of the following are appropriate when attempting to isolate N. gonorrhoeae from a genital specimen except:] Transport the genital swab in charcoal transport medium Plate the specimen on modified Thayer–Martin (MTM) medium Plate the specimen on New York City or Martin–Lewis agar Culture specimens in ambient oxygen at 37°C None . [Which characteristic describes antithrombin (AT)?] It is synthesized in megakaryocytes It is activated by protein C It is a cofactor of heparin It is a pathological inhibitor of coagulation None . [First-trimester screening for Down syndrome can be performed using which markers?] Alpha fetoprotein and unconjugated estriol Free β hCG and pregnancy-associated plasma protein A Intact hCG and dimeric inhibin A Dimeric inhibin B and α fetoprotein None . [What is the most common cause of male infertility?] Mumps Klinefelter’s syndrome Varicocele Malignancy None . [Red cells from a recently transfused patient were DAT positive when tested with anti-IgG. Screen cells and a panel performed on a patient’s serum showed very weak reactions with inconclusive results. What procedure could help to identify the antibody?] Elution followed by a panel on the eluate Adsorption followed by a panel on the adsorbed serum Enzyme panel Antigen typing the patient’s red cells None . [Which of the following tests best differentiates Shigella species from E. coli?] Hydrogen sulfide, VP, citrate, and urease Lactose, indole, ONPG, and motility Hydrogen sulfide, MR, citrate, and urease Gas, citrate, and VP None . [A thermally dimorphic fungus shows a filamentous mold form with tuberculate macroconidia at room temperature, and a yeast form above 35°C. Which organism best fits this description?] Histoplasma capsulatum Paracoccidioides brasiliensis Candida albicans Coccidioides immitis None . [What immune elements are involved in a positive skin test for tuberculosis?] IgE antibodies T cells and macrophages NK cells and IgG antibody B cells and IgM antibody None . [Which of the following is a potential source of error in the hexokinase method?] Galactosemia Hemolysis Sample collected in fluoride Ascorbic acid None . [Which of the following is inappropriate when collecting a 24-hour urine sample for catecholamines?] Urine in the bladder is voided and discarded at the start of the test At 24 hours, any urine in the bladder is voided and added to the collection All urine should be collected in a single container that is kept refrigerated Ten mL of 1N sodium hydroxide should be added to the container before collection None . [What antibodies are formed by a Bombay individual?] Anti-A and anti-B Anti-H Anti-A,B Anti-A, B, and H None . [Which of the following conditions is most often associated with a pleural fluid glucose below 30 mg/dL?] Diabetes mellitus Pancreatitis RA Bacterial pneumonia None . [In the ultraviolet enzymatic method for BUN, the urease reaction is coupled to a second enzymatic reaction using:] AST Glutamate dehydrogenase Glutamine synthetase Alanine aminotransferase (ALT) None . [Which of the following abnormal types of Hgb migrates to the same position as Hgb S on agarose or cellulose acetate at pH 8.6?] Hgb C Hgb DPunjab Hgb OArab Hgb E None . [A routine, complete stool culture procedure should include media for the isolation of E. coli O157:H7 as well as:] Salmonella, Shigella, Yersinia, Campylobacter, and Staphylococcus aureus Vibrio cholerae, Brucella, and Yersinia spp. S. aureus, group B streptococci, and group D streptococci Clostridium difficile, Clostridium perfringens, and Yersinia spp. None . [Which of the following is true regarding granulocyte concentrates?] The product must contain a maximum of 1.0 × 10^10 granulocytes The pH must be 6.0 The product must be crossmatched The product must be irradiated None Comment . [Which immunoglobulin cross links mast cells to release histamine?] IgG IgM IgA IgE None . [The following is (are) successful indicator(s) of Quality Assurance (QA) and Quality Improvement (QI) programs in a clinical laboratory:] A “log” of incident report and solutions attained Emergency department and STAT “turnaround times” Positive patient identification wristbands for blood bank operations All of these options None . [Which of the following enzymes allows creatinine to be measured by coupling the creatinine amidohydrolase (creatininase) reaction to the peroxidase reaction?] Glucose-6-phosphate dehydrogenase Creatinine iminohydrolase Sarcosine oxidase Creatine kinase None . [What constitutes a diagnosis of viral hepatitis?] Abnormal test results for liver enzymes Clinical signs and symptoms Positive results for hepatitis markers All of these options None . [Which in vitro test measures IgE levels against a specific allergen?] Histamine release assay Radioimmunosorbent test (RIST) Fluorescent allergosorbent test (FAST) Precipitin radioimmunosorbent test (PRIST) None . [A gram-positive (gram-variable), beaded organism with delicate branching was recovered from the sputum of a 20-year-old patient with leukemia. The specimen produced orange, glabrous, waxy colonies on Middlebrook’s agar that showed partial acid-fast staining with the modified Kinyoun stain. What is the most likely identification?] Rhodococcus spp. Actinomadura spp. Streptomyces spp. Nocardia spp. None . [Which organism is sometimes mistaken for Salmonella and will agglutinate in Salmonella polyvalent antiserum?] C. freundii strains Proteus mirabilis strains S. sonnei strains E. coli None . [Drugs rapidly infused intravenously usually follow which elimination model?] One compartment, first order One compartment, logarithmic Biphasic or two compartment with serum level rapidly falling in the first phase Michaelis–Menton or concentration-dependent elimination None . [SITUATION: A lipemic specimen collected from an adult after a 12-hour fast was assayed for total cholesterol, triglycerides, and HDL cholesterol using a direct HDL method. Following are the results: Total cholesterol = 220 mg/dL HDL cholesterol = 40 mg/dL Triglyceride = 420 mg/dL The physician requests an LDL cholesterol assay after receiving the results. How should the LDL cholesterol be determined?] Dilute the specimen 1:10 and repeat all tests; calculate LDL cholesterol using the Friedewald equation Perform a direct LDL cholesterol assay Ultracentrifuge the sample and repeat the HDL cholesterol on the infranate. Use the new result to calculate the LDL cholesterol Repeat the HDL cholesterol using the manganese heparin precipitation method. Use the new result to calculate the LDL cholesterol None . [Identify the following bacterium and specimen pairing that is mismatched (specimen not appropriate for isolation).] Chlamydia (Chlamydophila) psittaci: fecal swab Chlamydia trachomatis: first voided urine Chlamydia trachomatis: endocervical swab Chlamydia pneumonia: throat swab or sputum None . [Plate 30 is from a Wright’s-stained peripheral blood film, 1,000×. Which of the following best describes the cells in this plate?] Normal morphology Macrocytic red blood cells Hypersegmented neutrophil present Reduced platelets None Comment . [Which of the following statements regarding amylase methods is true?] Dilution of serum may result in lower than expected activity Methods generating NADH are preferred because they have higher sensitivity Synthetic substrates can be conjugated to p-nitrophenol (PNP) for a kinetic assay The reference range is consistent from method to method None . [Presumptive tests used for identification of the Pseudomonas spp. are:] Oxidase, oxidation–fermentation (OF) glucose (open), OF glucose (sealed), motility, pigment production Growth on blood agar plate (BAP) and eosin–methylene blue (EMB) agars, lysine decarboxylation, catalase Growth on MacConkey, EMB, and XLD agars and motility Growth on mannitol salt agar and flagellar stain None . [Which technology may report an Rh-weak D positive as Rh negative?] Gel System Solid Phase Tube Testing None of these options None . Time's up
