Abstract
This paper presents a case of intrafamilial infection of pulmonary tuberculosis from a daughter to a father. Establishment of methods for the control of pulmonary tuberculosis and advancement of chemotherapy have contributed to the remarkable decrease in the incidence of pulmonary tuberculosis and the mortality by this disease. However, in a society in which uninfected low-age people and infected middle-and high-age people are living together, there is a high risk of mass infection among young people. The risk of infection is especially high for family members who reside with an infective patient in the family. Such a unit of society is a highest risk group. It is, therefore, very important to try early detection and treatment by persuading all family members to recieve examination when this disease is symptomatically suspected and also by repeating the screening of family members against intrafamilial infection.
