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Background:  Intensified efforts to improve tuberculosis (TB) diagnosis, treatment, and prevention are needed to meet global EndTB targets. Community health workers’ (CHWs) knowledge with respect to case finding is vital in tuberculosis elimination. This study aimed to determine the effect of tuberculosis training on the knowledge of community health workers in Nigeria.    Methods:  As part of a larger multicomponent intervention study, a randomised control trial was conducted with CHWs in 18 primary health care (PHC) clusters in Nigeria. The clusters were allocated to three arms: training and cash incentive (A), training only (B), and control (C) arms. Arms (A) and (B) received training on tuberculosis symptoms, prevention, diagnosis and treatment while the control arm (C) did not receive training. Participants’ knowledge on tuberculosis was assessed using questionnaires administered pre- and post-intervention. Data was analyzed using GraphPad Prism. Descriptive data was presented in tables and bivariate data was analyzed using chi square. Statistical significance was set as P&lt;0.05.    Results:  There was a significant increase in the total knowledge score (25.4%), knowledge of general symptoms (24.4%), prevention (22.6%) and diagnosis and treatment (30.0%) across all study arms post-intervention (p&lt;0.0001). Compared with the control arm, the training arm (A) had a higher proportion of good total knowledge score (94.4%) and arm (B) had a lower proportion of good total knowledge score (83.1%) when compared to the control group (93.1%). These were, however, not statistically significant.    Conclusions:  An improvement in the CHWs’ knowledge of symptoms, prevention, diagnosis and treatment of tuberculosis was observed after a training intervention was done. Integration of routine tuberculosis training is recommended to improve tuberculosis case finding in high burden communities.    Pan African Clinical Trial Registry registration:  PACTR202010691865364 (14/01/2020)

Effect of tuberculosis training on community health workers’ knowledge: a cluster randomized control trial in South Nigeria