A 46 year old male living in a homeless shelter is exposed to TB from a fellow resident. He is found to have a 15 m of induration on the mantoux skin test.
Which of the following risk factors will increase the man's likelihood of developing active TB subsequent to his infection?
a) History of cough variant asthma.
b) Scliosis.
c) Chronic obstructive pulmonary disease (COPD).
d) Bronchitis.
e) Siderosis.
