Mohammad Samet*, Masoud Rahimian, Samaneh Meshkat and Sanaz Zand Pages 1 - 6 ( 6 )
Background: Black dust deposited in the lungs is called anthracosis. By damaging bronchial mucosa, anthracosis can reduce the mucociliary cleaning function. Initial reports indicate that there is a relationship between anthracosis and pulmonary tuberculosis. Due to obstructive effects of anthracosis on distal airways and disruption in proper sampling of bronchoalveolar lavage (BAL), other diagnostic methods are necessary for estimating the tuberculosis prevalence at these patients. Aims of this study is evaluation of tissue sample adjacent to anthracotic plaque for acid-fast bacilli smear and culture.
Methods: This is a cross-sectional analysis study on 100 patients referred to Shahid Sadoughi Hospital who needed bronchoscopy and anthracotic plaque based on bronchoscopy results. Bronchial fluid lavage, two biopsy samples for culture, and smear of Mycobacterium tuberculosis from the surrounding of these plaques were prepared. Data analyses were done SPSS (version 18).
Results: One-hundred patients at the age range 46-91years were studied. The patients with tuberculosis diagnosis based on smear of BAL and bronchial tissue samples and culture of BAL and bronchial tissue samples were 7%, 13%, 6% and 8% respectively. Presence of granuloma in histopathology was seen in 15 patients infected with tuberculosis. (κ > 0.04, p-value <0.05). In patients with positive tuberculosis, culture of bronchoalveolar lavage was superior to other methods.
Conclusions: Diagnostic value of BAL method and tissue biopsy in anthracotic patients with tuberculosis did not show a statistically significant difference. Comparing with other methods, BAL culture was more positive. Therefore, tissue biopsy is not a good alternative to BAL.
Anthracosis, Tuberculosis, Bronchoalveolar lavage (BAL), Biopsy, Bronchoscopy
Internal Medicine Department, Shahid Sadoughi Hospital, Shahid Sadoughi University of Medical Sciences, Yazd, Internal Medicine Department, Shahid Sadoughi Hospital, Shahid Sadoughi University of Medical Sciences, Yazd, Internal Medicine Department, Shahid Sadoughi University of Medical Sciences, Yazd, Medical student, Shahid Sadoughi University of Medical Sciences, Yazd