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I answered to this question:

In most forms of the disease, the bacillus M. tuberculosis spreads slowly and widely in the lungs, causing the formation of hard nodules (tubercles) in the respiratory tissues and form cavities in the lungs.

and got zero points.

What is the correct answer to the question?

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Did you read the wikipedia article on this ? – biogirl Sep 2 '13 at 16:10
It is not sufficient and very bad. Must be exact in the answer and answer exactly to the question. My answer was apparently too general. – Masi Sep 2 '13 at 17:46

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