Welcome to your MLT- Professional Name: Email: Phone Number: [Two helminth eggs that may resemble one another are:] Diphyllobothrium latum and Paragonimus westermani Opisthorchis sinensis and Fasciolopsis buski Taenia saginata and Hymenolepis nana Ascaris lumbricoides and Trichostrongylus None . [Plate 22 is a Gram-stained CSF concentrated by centrifugation, 1,000×. Which organism is present?] Neisseria meningitidis Staphylococcus aureus Streptococcus pneumonia Listeria monocytogenes None Comment . [A member of the clergy is with the patient when you arrive to collect a routine specimen. What should you do?] Ask the patient’s nurse what you should do. Come back after the clergy person has gone. Fill out a form saying you were unable to collect the specimen. Say “Excuse me, I need to collect a specimen from this patient.” None . [Which statement about the dry reagent strip test for leukocytes is true?] The test detects only intact white blood cells (WBCs) The reaction is based upon the hydrolysis of substrate by WBC esterases Several antibiotics may give a false-positive reaction The test is sensitive to 2–3 WBCs per HPF None . [SITUATION: A 53-year-old woman donates blood at her place of employment. She weighs 150 lb and has a hemoglobin of 13 g/dL. She is currently on warfarin and vitamin B12. Is she an acceptable donor?] Yes No, she is on warfarin Yes, for red cells only No, her hemoglobin is too low None . [Cerebrospinal fluid (CSF) is formed by ultrafiltration of plasma through the:] Choroid plexus Sagittal sinus Anterior cerebral lymphatics Arachnoid membrane None . [A cell population is positive for surface markers CD45, CD3, CD4, and Tdt. Which type of leukocytes are these?] Lymphocytes Granulocytes Monocytes Early myeloid precursors None . [Which of the following is associated with multiple factor deficiencies?] An inherited disorder of coagulation Severe liver disease Dysfibrinogenemia Lupus anticoagulant None . [Which substrate concentration is needed to achieve zero-order conditions?] Greater than 99 × Km [S] = Km Less than 10 × Km [S] = 0 None . [What method can be employed to detect bacteria in random donor platelets?] pH Glucose Pan genera detection (PGD) assay Gram stain None . [A 69-year-old male patient who was a cigarette smoker visited the doctor’s office complaining of a cough and congestion of the lungs. Routine cultures of early morning sputum (x3) for bacteria as well as for AFB revealed no pathogens. A fungal culture was also ordered that grew the following on Sabouraud dextrose agar after 3 days: Hyphae = Septate with dichotomous branching Spores = Produced by conidial heads with numerous conidia Colonies = Velvety or powdery, white at first, then turning dark greenish to gray (reverse = white to tan) Vesicle = Holding phialides usually on upper two-thirds only What is the most likely identification?] Aspergillus niger Absidia spp. Mucor spp. Aspergillus fumigatus None . [A helminth egg is described as having terminal polar plugs. The most likely helminth is:] Hookworm Trichuris trichiura Fasciola hepatica Diphyllobothrium latum None . [Which statement best describes the relationship between luteinizing hormone (LH) and folliclestimulating hormone (FSH) in cases of dysmenorrhea?] Both are usually increased when there is pituitary adenoma Increases in both hormones and a decrease in estrogen signal a pituitary cause of ovarian failure Both hormones normally peak 1–2 days before ovulation In menopause, the LH level at the midcycle peak is higher than the level of FSH None . [A linearity study is performed on a visible spectrophotometer at 650 nm and the following absorbance readings are obtained: Concentration of Standard Absorbance 10.0 mg/dL 0.20 20.0 mg/dL 0.41 30.0 mg/dL 0.62 40.0 mg/dL 0.79 50.0 mg/dL 0.92 The study was repeated using freshly prepared standards and reagents, but results were identical to those shown. What is the most likely cause of these results?] Wrong wavelength used Insufficient chromophore concentration Matrix interference Stray light None . [Oval fat bodies are often associated with:] Lipoid nephrosis Acute glomerulonephritis Aminoaciduria Pyelonephritis None . [Which of the following is a type of serous fluid?] Amniotic fluid Pleural fluid Spinal fluid Synovial fluid None . [What is the principle of the colorimetric reagent strip determination of SG in urine?] Ionic strength alters the pKa of a polyelectrolyte Sodium and other cations are chelated by a ligand that changes color Anions displace a pH indicator from a mordant, making it water soluble Ionized solutes catalyze oxidation of an azo dye None . [Which group of tests best identifies the Morganella and Proteus genera?] Motility, urease, and phenylalanine deaminase Malonate, glucose fermentation, and deoxyribonuclease (DNase) Indole, oxidase, MR, and VP Indole, citrate, and urease None . [All of the following tests measure phagocyte function except:] Leukocyte adhesion molecule analysis Di Hydro rhodamine reduction assay NBT test IL-2 (interleukin-2) assay None . [Which statement best describes the clinical utility of B-type natriuretic peptide (BNP)?] Abnormal levels may be caused by obstructive lung disease A positive test indicates prior myocardial damage caused by AMI that occurred within the last 3 months A normal test result (<100 pg/mL) helps rule out congestive heart failure in persons with symptoms associated with coronary insufficiency A level above 100 pg/mL is not significant if evidence of congestive heart failure is absent None . [Multiple myeloma and Waldenstrom’s macroglobulinemia have all the following in common except:] Monoclonal gammopathy Hyperviscosity of the blood Bence–Jones protein in the urine Osteolytic lesions None . [The adult tapeworm of Echinococcus granulosus is found in the intestine of:] Dogs Sheep Humans Cattle None . [A manual white blood cell (WBC) count was performed. A total of 36 cells were counted in all 9-mm2 squares of a Neubauer-ruled hemacytometer. A 1:10 dilution was used. What is the WBC count?] 0.4 × 109/L 2.5 × 109/L 4.0 × 109/L 8.0 × 109/L None . [In addition to phenylketonuria, maple syrup urine disease, and homocystinuria, what other aminoaciduria can be detected by tandem MS?] Alkaptonuria Hartnup disease Citrullinemia Cystinuria None . [Which additive prevents glycolysis?] EDTA Heparin Potassium oxalate Sodium fluoride None . [Which of the following hemoglobins migrates to the same position as Hgb A2 at pH 8.6?] Hgb H Hgb F Hgb C Hgb S None . [Which double-stranded DNA molecule has the highest melting temperature?] An oligonucleotide with a repeating sequence of A-A-A at the 5´ end A molecule of 5,000 base pairs with a high number of A-T base pairs An oligonucleotide with a large number of repeating C-G-C codons A DNA polymer of 100,000 base pairs None . [Which of the following statements regarding urinary casts is correct?] Fine granular casts are more significant than coarse granular casts Cylindruria is always clinically significant The appearance of cylindroids signals the onset of end-stage renal disease Broad casts are associated with severe renal tubular obstruction None . [Cultures obtained from a dog bite wound produced yellow, tan, and slightly pink colonies on blood and chocolate agar with a margin of fingerlike projections appearing as a film around the colonies. Given the following results at 24 hours, which is the most likely organism? Oxidase = + Catalase = + Growth on MacConkey agar = Neg Motility = Neg] Actinobacillus spp. Eikenella spp. Capnocytophaga spp. Pseudomonas spp. None . [Which method is used to test for HIV infection in infants who are born to HIV-positive mothers?] ELISA Western blot test Polymerase chain reaction Viral culture None . Time's up
