Medical Laboratory Scientist (MLS) ASCP Exam 2025 – 400 Free Practice Questions to Pass the Exam

The characteristic indicative of Micrococcus is susceptibility to bacitracin and resistance to furazolidone. Micrococcus species are typically gram-positive cocci that tend to appear in clusters, similar to staphylococci. They are also known for their susceptibility to bacitracin, which is used to differentiate them from other cocci such as Staphylococcus.

Additionally, Micrococcus species are generally resistant to furazolidone, which helps further distinguish them from other organisms in the same family. These biochemical and susceptibility traits assist in the identification of Micrococcus during laboratory testing.

In contrast, other options do not accurately describe Micrococcus. For instance, although there are mild similarities between Micrococcus and some gram-negative organisms in appearance or cluster formation, Micrococcus is gram-positive and does not present as gram-negative cocci. The mention of gram-positive bacilli with a green pigment better describes organisms like Pseudomonas or certain strains of Corynebacterium rather than Micrococcus. Lastly, the statement regarding transmission via airborne droplets does not apply to Micrococcus, as it is primarily considered a part of the normal skin flora and is not typically associated with respiratory transmission.