Medical Technologist Test Analyzing Medical Technologist 5

Question 1

Which method is the REFERENCE STANDARD for blood glucose measurement?

Accepted Answer

Hexokinase method

Answer

The hexokinase method is the NCCLS/WHO reference method for glucose measurement due to its high specificity and accuracy.

Question 2

A patient has a positive direct antiglobulin test (DAT) with anti-IgG but negative with anti-C3d. Which condition is MOST consistent?

Accepted Answer

Warm autoimmune hemolytic anemia

Answer

Warm AIHA is typically IgG-mediated without complement activation, resulting in a DAT positive with anti-IgG but negative with anti-C3d.

Question 3

Which parasite is identified by finding 'owl's eye' inclusions in cells on a peripheral blood smear?

Accepted Answer

None — owl's eye inclusions are found in CMV-infected cells, not blood parasites

Answer

Owl's eye inclusions are the hallmark of cytomegalovirus (CMV)-infected cells, not blood parasites; Babesia shows tetrad (Maltese cross) forms.

Question 4

In mycobacteriology, which staining technique uses heat to drive carbol fuchsin into acid-fast organisms?

Accepted Answer

Ziehl-Neelsen stain

Answer

The Ziehl-Neelsen (hot) method uses heat to facilitate penetration of carbol fuchsin into mycobacterial waxy cell walls.

Question 5

A newborn has a total bilirubin of 22 mg/dL at 36 hours of life. Which test is MOST important to order immediately?

Accepted Answer

Direct antiglobulin test (DAT)

Answer

A DAT on cord or neonatal blood detects maternal IgG antibodies coating fetal RBCs, determining if hemolytic disease of the newborn is present.

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