Trends of Extra-pulmonary Tuberculosis under Revised National Tuberculosis Control Programme: A study from south Delhi.

Background & Objectives: Extra-pulmonary tuberculosis (EPTB) cases have been treated with a daily short course chemotherapy (SCC) regimens in past. Following the success of Directly Observed Treatment-Short Course (DOTS) programme over recent years, a study was carried out to determine prevalence of EPTB, to draw comparison between annual case detection of pulmonary TB (PTB) and extra-pulmonary TB and to assess outcome of DOTS in EPTB in a patient population of Delhi. Methods: All consecutive EPTB cases of Delhi, diagnosed within LRS Institute of TB and Respiratory Diseases between January 1996 to March 2003 and subsequently given DOTS at the area DOTS Centres, constituted the study group. Results: Of overall 14185 cases, 2849 (20%) had EPTB. A significantly higher prevalence was observed in females (57%) and in young age (mean + standard deviation of 23.4 + 12.8 years). Commonest involved site was lymph node (54%). Whereas number of PTB and EPTB cases have increased over successive years, percentage of former declined significantly through 84 in 1996 to 78 in 2002 and that of latter rose significantly through 16 to 22 correspondingly. EPTB to PTB ratio changed significantly from 1:5 at start to about 1:3.5 at study-conclusion. Treatment completion was observed in 94% (1775/1885) of EPTB cases. Conclusions: Under Revised National TB Control Programme (RNTCP) employing a DOTS strategy, annual case detection has improved for both pulmonary and extra-pulmonary TB. Cure of infectious disease is likely to have resulted in a relative rise of the annual EPTB case detection. DOTS effected an acceptable treatment outcome in EPTB case management.