New Quiz 10 Dec Welcome to your MLT- Professional Name: Email: Phone Number: [In real-time PCR, what value is needed in order to determine the threshold?] Background signal Melt temperature Maximum fluorescence Threshold cycle None . [The presence of tyrosine and leucine crystals together in a urine sediment usually indicates:] Renal failure Chronic liver disease Hemolytic anemia Hartnup disease None . [A flow cytometry scattergram of a bone marrow sample shows a dense population of cells located in-between normal lymphoid and normal myeloid cells. What is the most likely explanation?] The sample was improperly collected An abnormal cell population is present The laser optics are out of alignment The cells are most likely not leukocytes 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 . [This type of antibody response is analogous to an anamnestic antibody reaction.] Primary Secondary Tertiary Anaphylactic None . [The microsporidia are protozoans (now classified with the fungi) that have been implicated in human disease primarily in:] Immunocompromised patients Pediatric patients under the age of 5 years Adult patients with congenital immunodeficiencies Patients who have been traveling in the tropics None . [Which of the following conditions is associated with normal urine color but produces red fluorescence when urine is examined with an ultraviolet (Wood’s) lamp?] Acute intermittent porphyria Lead poisoning Erythropoietic porphyria Porphyria cutanea tarda None . [The aseptic collection of blood cultures requires that the skin be cleansed with:] 2% iodine and then 70% alcohol solution 70% alcohol and then 2% iodine or an iodophor 70% alcohol and then 95% alcohol 95% alcohol only None . [SITUATION: An O-negative mother gave birth to a B-positive infant. The mother had no history of antibodies or transfusion. This was her first child. The baby was mildly jaundiced and the DAT weakly positive with polyspecific antisera. What could have caused the positive DAT?] Anti-D from the mother coating the infant red cells An alloantibody, such as anti-K, coating the infant red cells Maternal anti-B coating the infant cells Maternal anti-A, B coating the infant cells None . [Proximal is defi ned as:] away from the middle. closest to the middle. farthest from the center. nearest to the point of attachment. None . [The process by which the body maintains a state of equilibrium is:] anabolism. catabolism. homeostasis. venostasis. None . [Staphylococcus saprophyticus is best differentiated from Staphylococcus epidermidis by resistance to:] 5 μg of lysostaphin 5 μg of novobiocin 10 units of penicillin 0.04 unit of bacitracin None . [On Panel 2, which cells are homozygous for C?] 1, 2, 3 1, 2, 9 3, 4, 7 7, 8, 10 None Comment . [Which of the following individuals is acceptable as a blood donor?] A 29-year-old man who received the hepatitis B vaccine last week A 21-year-old woman who had her nose pierced last week A 30-year-old man who lived in Zambia for 3 years and returned last month A 54-year-old man who tested positive for hepatitis C last year, but has no active symptoms of disease None . [What is the purpose of C3a, C4a, and C5a, the split products of the complement cascade?] To bind with specific membrane receptors of lymphocytes and cause release of cytotoxic substances To cause increased vascular permeability, contraction of smooth muscle, and release of histamine from basophils To bind with membrane receptors of macrophages to facilitate phagocytosis and the removal of debris and foreign substances To regulate and degrade membrane cofactor protein after activation by C3 convertase None . [A unit of packed RBCs is split using the open system. One of the half units is used. What may be done with the second half unit?] Must be issued within 24 hours Must be issued within 48 hours Must be irradiated Retains the original expiration date None . [Which of the following enzymes is common to all enzymatic methods for triglyceride measurement?] Glycerol phosphate oxidase Glycerol phosphate dehydrogenase Glycerol kinase Pyruvate kinase None . [A whole-blood donor currently on clopidogrel (Plavix) is precluded from donating which product?] Platelets Red blood cells FFP Cryoprecipitate None . [Parasite stages that are immediately infective for humans on passage from the gastrointestinal tract include:] Schistosoma spp. eggs Toxoplasma gondii bradyzoites Giardia lamblia trophozoites Cryptosporidium spp. oocysts 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 . [Which of the following statements regarding ALP is true?] In normal adults, the primary tissue source is fast-twitch skeletal muscle Geriatric patients have a lower serum ALP than other adults Serum ALP levels are lower in children than in adults Pregnant women have a higher level of serum ALP than other adults None . [What does the genotype —/— represent in the Rh system?] Rh negative D mosaic Rhnull Total Rh None . [A mold that produces colonies with a dark brown, green-black, or black appearance of both the surface and reverse side is classified as a:] Dematiaceous mold Dermatophyte Hyaline mold Dimorphic fungus None . [Plate 4 shows the electrophoresis of serum proteins on a high-resolution agarose gel at pH 8.6. Which band represents the β lipoprotein?] A B C D None Comment . [An 18-month-old boy has recurrent sinopulmonary infections and septicemia. Bruton’s X-linked immunodeficiency syndrome is suspected. Which test result would be markedly decreased?] Serum IgG, IgA, and IgM Total T-cell count Both B- and T-cell counts Lymphocyte proliferation with phytohemagglutinin stimulation None . [Which of the following statements regarding infection with hepatitis D virus is true?] Occurs in patients with HIV infection Does not progress to chronic hepatitis Occurs in patients with hepatitis B Is not spread through blood or sexual contact None . [In which condition is the LD most likely to be within normal limits?] Hepatic carcinoma Pulmonary infarction Acute appendicitis Crush injury None . [The abbreviation for the routine hematology test that includes hemoglobin, hematocrit, red blood count, and white blood count determinations is:] CBC. CDC. CPK. CRP. None . [The yeast form of which dimorphic mold shows a large parent yeast cell surrounded by smaller budding yeast cells?] Paracoccidioides brasiliensis Sporothrix schenckii Coccidioides immitis Histoplasma capsulatum None . [Anaerobic bacteria are routinely isolated from all of the following types of infections except:] Lung abscesses Brain abscesses Dental infections Urinary tract infections None . Time's up
