Question 1

A clinical trial is evaluating the efficacy of a new antifungal agent against invasive aspergillosis. Serum galactomannan levels are being used as a biomarker to monitor the infection. A decrease in galactomannan levels during treatment would indicate:

Options :

A : Development of resistance to the antifungal agent.

B : Successful clearance or reduction of the Aspergillus burden.

C : A false-positive result in the galactomannan assay.

D : Concurrent infection with a non-Aspergillus mold.

Answer: B

Question 2

A clinical laboratory manager is implementing a new automated blood culture system. Which aspect is LEAST likely to be part of the initial verification/validation process before clinical use?

Options :

A : Comparison of time-to-detection with the previous system

B : Verification of detection of a panel of common bloodstream pathogens

C : Assessment of the system's contamination rate over one year of routine use

D : Establishing workflow and training competency for laboratory staff

Answer: C

Question 3

The human virome, the collection of viruses that reside in and on the human body, is increasinglyrecognized for its role in health and disease. Which of the following statements regarding the human virome is MOST accurate?

Options :

A : The human virome is primarily composed of pathogenic viruses that cause acute infections.

B : The composition of the human virome is relatively stable over time and is not influenced by environmental factors.

C : Bacteriophages, viruses that infect bacteria, are a significant component of the human gut virome.

D : The human virome is largely independent of the host's immune status.

Answer: C

Question 4

A Gram-positive rod is isolated from the blood culture of a neonate with sepsis. The organism exhibits weak beta-hemolysis on sheep blood agar, is catalase-positive, hydrolyzes esculin in the presence of bile, and demonstrates characteristic "tumbling" motility in a wet mount prepared from a broth culture incubated at 25° C. Which organism is most likely?

Options :

A : Corynebacterium jeikeium

B : Bacillus anthracis

C : Listeria monocytogenes

D : Erysipelothrix rhusiopathiae

Answer: C

Question 5

A clinical laboratory performs a cefoxitin disk diffusion test on a Staphylococcus aureus isolate from a wound culture. The zone of inhibition measures 18 mm. According to current CLSI M100 guidelines, how should this result be interpreted regarding oxacillin/methicillin susceptibility?

Options :

A : Susceptible (report oxacillin as susceptible)

B : Resistant (report oxacillin as resistant; infer MRSA)

C : Intermediate (requires MIC testing)

D : Indeterminate (requires mecA gene testing)

Answer: B

Free ABMM Mock Exam – Practice Online Confidently

Buying Options: