<prompt> All are features of Silico-tuberculosis exceptHigh sputum AFB veChildren of such cases do not get diseaseImpairement of total lungNodular fibrosis  <response>: In recent years doubts have risen in the association between silicois and tuberculosis as:Sputum is rarely AfBChildren and women of sts do not develop tuberculosisPost mortem of sts fail to prove existence of tuberculosisRadilogical evidence of both conditions is similar. 