Prevalence of Extra-pulmonary Tuberculosis among Patients Diagnosed with Tuberculosis in a Tertiary Hospital in Bauchi, Northeastern Nigeria - A Five-Year Review

Background Extra- pulmonary tuberculosis ( EPTB) contributes to the burden of Tuberculosis (TB) especially in developing countries. Despite this fact, information on the prevalence of EPTB is scarce. The aim of this study is to determine the five-year prevalence of EPTB among patients diagnosed with tuberculosis (TB) that attended and received treatment for TB at directly observed treatment short course (DOTS) clinic of Abubakar Tafawa Balewa University Teaching Hospital (ATBUTH), Bauchi, North-eastern Nigeria. Methodology This is a retrospective review of all patients' records diagnosed with TB that attended and received treatment at the TB DOTS clinic of ATBUTH, Bauchi from January, 2017 to December, 2021. Extracted data was analyzed using IBM SPSS version 23.0 software. Result There were 676 patients comprising of 389 (57.5%) males and 287 (42.5%) females and out of these, 208 had EPTB. The estimated five-year prevalence of EPTB in the studied cases was 30.8%. Tuberculosis of the spine was the predominant form of EPTB in this study with 117 (56.3%) cases. This was followed by TB Lymph nodes 40 (19.2%), TB Abdomen 36 (17.3%), TB Pleura 6 (2.9%), TB Pericardium 3 (1.4%), 2 (1.0%) each of TB Breast and CNS, and 1 (0.5%) each of TB Testicle and Upper arm. Seventy-eight (11.5%) patients were HIV positive, 549 (81.2%) were HIV-negative and the HIV status of 49 (7.2%) patients was unknown. Conclusion The study showed prevalence of EPTB is still high as reported in some literature. Tuberculosis of spine was the commonest form of EPTB. These findings underscore the need for continued screening of EPTB to reduce the burden of TB in resource-poor countries.