MLT Practice Exam question well answered 2023

MLT Practice Exam To correctly report a colony, count in a urine culture plated using a calibrated 0.001 mL loop, the observed colony count must be multiplied by which of the following? a. 1 b. 100 c. 1000 d. 2000 - correct answer c. 1000 Examination of peripheral blood smear revealed 12 nucleated erythrocytes per 100 leukocytes. Which histogram observation correlates with this finding? a. Failure of the granulocyte population to return to baseline on the leukocyte histogram b. Shift to the left of the erythrocyte population on the erythrocyte histogram c. Failure of the lymphocyte population to begin at baseline on the leukocyte histogram d. Shift to the right of the platelet population on the platelet histogram - correct answer c. Failure of the lymphocyte population to begin at baseline on the leukocyte histogram A specimen for anaerobic culture is place in an anaerobic holding jar in order to: a. Minimize exposure to oxygen b. Maximize spore formation c. Increase the growth rate of the sample d. Decrease the exposure to UV light - correct answer a. Minimize the exposure to oxygen A clinical laboratory technician wishes to examine an unstained, wet preparation of cells or organism prior to dehydration. Which of the following types of microscopes would be best to use in this scenario? a. Phase Contrast b. Fluorescence c. Brightfield d. Electron - correct answer a. Phase Contrast An organism gives the following reactions: TSI and KIA alkaline slant over an acid butt, H2S positive ferments glucose. Based on these reactions, what is the most likely identification of the organism? a. Proteus mirabilis b. Esherichia coli c. Pseudomonas aeruginosa d. Salmonella sp. - correct answer a. Proteus mirabilis A pregnant woman who has active syphillis and a RPR of 1:32 is being treated with penicillin. She gives birth to a baby boy. When the cord blood from the baby is tested, the RPR is 1:2. Based on the above data, the most likely interpretation is: a. The baby has congenital syphillis b. The baby does not have syphillis. A titer this low represents passive acquisition of the antibody from the mother c. The baby does not have syphillis. A titer this low represents a biological false positive d. No definitive conclusion can be made from this data. Further testing is necessary - correct answer D.No definitive conclusion can be made from this data. Further testing is necessary Which of the following potential donors would be acceptable for donation of whole blood? a. An individual who had a tattoo applied b. A phlebotomist with a reported needle stick injury 10 months ago c. An individual who has just immigrated to U.S. from Great Britain d. An 18-year old male taking antibiotics for a severe case of acne - correct answer d.An 18-year old male taking antibiotics for a severe case of acne An organism from a lung biopsy grew as mould at room temperature and a yeast at 37C. what is the most appropriate way to interpret these results? a. Specimen is contaminated, ask for repeat collection b. Dimorphic fungus present c. Two organisms are present but only the mould is significant d. Two pathogens are present - correct answer b.Dimorphic fungus present In a serological serial dilution, if tube 1 has 1mL of an undiluted specimen and doubling dilutions are used thereafter, what is the dilution in tube 10? a. 1:200 b. 1:500 c. 1:512 d. 1:1024 - correct answer c.1:512 Infectious mononucleosis exhibits what serological reaction below when serum from an actively infected patient is tested? a. Agglutination of guinea pig kidney cells after absorption of the serum specimen with horse red blood cells b. Agglutination of beef red blood cells after absorption of the serum specimen with horse red blood cells c. Agglutination of horse red blood cells after absorption of the serum specimen by guinea pig kidney cells d. Agglutination of horse red blood cells after absorption of the serum specimen by beef red blood cells - correct answer c.Agglutination of horse red blood cells after absorption of the serum specimen by guinea pig kidney cells Proficiency testing should be performed by: a. All personal who routinely perform the procedure b. Individuals on the day shift c. Section supervisors d. Newer personal whose performance requires monitoring - correct answer a.All personal who routinely perform the procedure A DAT profile gave the following results: {Polspecific: +} {IgG:+} {C3b: 0} These results are MOST consistent with: a. Warm autoimmune hemolytic anemia b. Cold autoimmune hemolytic anemia c. Complement deficiency d. Immunosuppressant - correct answer a.Warm autoimmune hemolytic anemia A clinical laboratory technician is given an unknown sample to document proficiency in the performance of glucose testing. The clinical laboratory technician obtains a result of 195mg/dL; the control values are within the acceptable range. What should the clinical laboratory technician do? a. Report the result as 195mg/dL b. Repeat the test to confirm the result c. Ask another clinical lab technician to perform the test to confirm the result d. Dilute the sample and repeat the test - correct answer a.Report the result as 195 mg/dL A control has a mean of 2.8 with a standard deviation of 0.3 of the values obtained, 68% should fall within a range of: a. 2.2 - 3.1 b. 2.5 - 3.4 c. 2.2 - 3.4 d. 2.5 - 3.1 - correct answer d.2.5 - 3.1 A new method for measuring blood urea nitrogen (BUN) is being considered by the chemistry dept. The following data are obtained for within-run precision studies after running the abnormal level control 10 times using the new method: 45, 48, 52, 53, 57, 55, 44, 45, 46, 50. The reference range for the control is 43 to 57 mg/dL. The manufacturer claims the C.V for the new method is 5.0%. what is the calculated C.V and is this precision acceptable? a. Calculated C.V. at 4.6% is less than the manufacture's; precision is acceptable b. Calculated C.V. at 9.3% is greater than the manufacture's; precision is unacceptable c. Calculated C.V. at 9.3% is less that the two times the manufacture's; precision is acceptable d. Calculated C.V. at 10.8% is greater than the manufacturer's; precision is unacceptable - correct answer b. Calculated C.V. at 9.3% is greater than the manufacture's; precision is unacceptable Which of the following is the serum protein fraction most likely to be DECREASED in nephritic syndrome? a. Albumin b. Alpha2 globulin c. Beta globulin d. Gamma globulin - correct answer D.Gamma globulin