Generalities:

Mycobacterium Tuberculosis Avium is the smallest known bacteria. It causes brain disorders, psychological problems, pain, inflammation. It can cause torticollis, where the muscles of the neck (particularly the sternocleidomastoid muscle, angular scapula and to a lesser extent the scalene muscles) contract involuntarily and cause the head to tilt. It can also cause Hydrocephaly.

Transmission:

Through infected animals or people.