I recognized increasing of lung-marking and unsharpness of phrenico-costalangles in most of all tb-reaction positive cases. I think this is a symptom of allergy. These findings were also observed in the majority of ambiguous cases, therefore, ambiguous cases should be included to positive group. The findings of the lungs are observed before allergic symptom (caused by tb-infection) appears, so I think X-ray findings will be recognized before tb-reaction.
Accordingly, even though the tb-reaction negative yet, if X-ray findings is significant then we must carefully continue to have periodical investigation especially if there are infection sources. Tb-reaction appears strongly parallel with the grade of X-ray findings and also they are found strongly among those who have infection source in the family.