What is the cell morphology of Mycobacterium tuberculosis?

When I looked at it under the microscope, it looked as if it were coccus by shape, but I looked it up and I found some sites consider it a bacillus, which one is it? I also need to double check on S. auerous, which I think it's coccus, M.smegmatis, which I think is bacillus. Thanks kids!