MLT Practice Exam Q&A 2023

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 - 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 - 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 - 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 - 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. - 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 defi