Here, we would choose "Myobacterium Tuberculae", which 'causes Tuberculosis in Humans.
It is spreadable disease and highly contagious, and communicate very rapidly, so when it first appeared, it was very difficult task to prevent ourselves from that Hazardous condition.
The Scientific name of this bacteria is "MyoBacterium Tuberculae", As it is directly spreads through air means, air is the vector as there's not any insect or external agent for that Job.
T.B. could be life threating if proper treatment is unavailable for a Patient. It exerts dangerous symptoms like: "Chills, fatigue, fever, loss of appetite, malaise, night sweats, or sweating"
Hope this helps!