BackgroundTuberculosis remains a major public health problem in various parts of the world. It leads to various haematological changes. Study of these haematological changes will help better patient management. Objective & methodsIt is to evaluate haematological changes in tuberculosis patients and compare the result with special emphasis to bone marrow changes as active case search is sharply decreasing the miliary tuberculosis. It is also to evaluate the patients with before and after the Intensive Phase of Anti Koch Treatment. Sputum positive and sputum negative tuberculosis patients confirmed by other ancillary techniques were included into this study. It is conducted at a tertiary level hospital in rural area. ResultIn this study bone marrow hypercellularity was of erythroid series with only 1.92% patients showed granuloma in bone marrow aspiration. In addition to bone marrow changes, significant changes were evident in haemoglobin level, Erythrocyte Sedimentation Rate (ESR) Total White Blood Cell count and RBC count. DiscussionIn majority cases this study showed Erythroid Hyperplasia. It is sharp contrast with other study where myeloid hyperplasia was evident. This study also differs from other study where high number of bone marrow granuloma was reported. In this study only 1.92% cases showed bone marrow granuloma. This study also documented higher number of anaemic cases mostly because of the institute serves poor and tribal population. ConclusionIn our study the cases showing granuloma and hyperplasia of myeloid series were limited. With introduction of Directly Observed Treatment and house to house active case search helped to sharply decrease bone marrow granuloma by limiting multi-organ spread. This study showed, ESR level may be considered as prognostic parameters of tuberculosis.