Is Mycobacterium Gram negative or positive?

Is Mycobacterium Gram negative or positive? The phylogenetic position of Mycobacterium tuberculosis relative to other bacteria is controversial. Its cell wall has characteristics of both Gram-positive and Gram-negative bacteria. What color is Mycobacterium in a Gram stain? Mycobacteria are Gram-positive, catalase positive, non-motile, non-spore forming rod-shaped bacteria (0.2–0.6 μm wide Read more…