Mycobacterium tuberculosis can be characterized by which type of colony formation?

Mycobacterium tuberculosis is known for its distinct colony morphology, which typically appears as tan or buff-colored colonies. One of the hallmark features of these colonies is the presence of cording formations, which occur due to the unique way mycobacteria replicate and stick together after division. This cording is a result of the waxy cell wall composition of the bacteria, making them appear as long, intertwined strands.

This specific colony formation is crucial for identification and differentiation from other bacteria in laboratory settings. The tan or buff coloration, combined with the cording characteristic, makes it easier for microbiologists to recognize and confirm the presence of Mycobacterium tuberculosis, aiding in the diagnosis of tuberculosis infections. Other colony characteristics described in the options do not align with those typically associated with M. tuberculosis, reinforcing the accuracy of the chosen answer.