Hi I understand your complain. Positive PPD test(Mantoux) does not mean that the patient has tuberculosis diseases.If the patient does not have complains like cronic cough,weight loss fever,low appetite and PPD positive the pulmonologist will take the patient under observation for a long time.However it depends of the epidemiological situation of TB of the country. Because in contries where the disease of tb has high prevalence and incidence ppd positive has not so importance,but it is the examination of the sputum bacillus of tb that is more importance for the diseases.While in countries with low prevalence and incidence only positive PPD test may be the cause to begin a prophylactic treatment for the patient. In this case i think that the other members of the family should do the PPD test.And the most important think here is to discover the most possible origin from where your daughter has fallen in contact with persons which had have that microbe.The microbe of tb is contagious only through coughing. So in conclusion better to see a lung specialist. Thank you Dr.Jolanda Pulmonologist