Source: Annual Congress 2002 - Aspects of respiratory disease in primary care
Disease area: Respiratory infections

Abstract

Turberculosis is considered to be one of the most important infectious disease around the world. Those who are in contact with pulmonary tuberculosis might be infected.
In this research, we have collected data and reviewed the value of routine contact procedure in screening for pulmonary tuberculosis (positive sputum) in Shiraz. Some of the factors which were considered to active our objective are age, sex, race and vaccination.
Eighty five individuals suffering from pulmonary tuberculosis (positive sputum) for about 4 years were considered as our index sample, then 626 individuals who are in contact with index sample were notified for tuberculin test. Our index sample consisted of 31 persons with Afghan nationality and the rest were Iranian. Two hundreds ninety five cases with 38% tuberculin positive test were in contact with the former group while three hundreds thirty one cases with 30% tuberculin positive test were in contact with Iranian group.(P<0.05)
In terms of age, 18% were > 5 years old, 30% were in between 6 to 14 years old and 52% were more than 15 years old with 22%, 33% and 38% as an positive tuberculin test results respectively.
In terms of sex in index cases, 31% were infected as a result of being in contact with female index cases while 35% with male index cases (p< 0.3) . As for sex factor in contact cases, tuberculin positive were 37% in male and 30% in female (p<0.3).
Among 626 contant cases, 212 cases showed 5 IU tuberculin skin test indicating induration of more than 10mm (34%).
In conclusion, we have found that tuberculin skin in contact procedure remain a valuable tool in the detection of amount of infection transmitted from index cases to contact cases.

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Citations should be made in the following way:
S. Alyasin, A. Alborzi (Shiraz, Iran). The rate of tuberculosis infection in closed contacts of smear positive pulmonary tuberculosis patients. Eur Respir J 2002; 20: Suppl. 38, 2992

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