Antimicrobial stewardship programmes in healthcare facilities in Lagos State, Nigeria: a needs assessment

•No formal ASP in place in 80% of healthcare facilities, and only six facilities had an AMS team.•No dedicated financial support in any facility and limited IT resources especially in primary and secondary facilities.•Only two facilities (8%) perform prospective audit and feedback and 28% monitor adherence to guidelines.•No private healthcare facility produced a cumulative antimicrobial susceptibility or AMS annual report for previous year.•Tracking was generally poor in healthcare facilities with ASPs, with only monitoring of adherence to treatment guidelines.