Who to Involve and Where to Start Integrating Tuberculosis Screening into Routine Healthcare Services: Positive Cough of Any Duration as the First Step for Screening Tuberculosis in Ethiopia.

Background: Recent country surveys have shown an unacceptably high prevalence of confirmed tuberculosis (TB) even among those with a low duration of cough, and more than 50% of those with bacteriologically confirmed pulmonary tuberculosis (PTB) do not report symptoms that correspond to presumptive TB. Furthermore, there has been an increase in the incidence of smear-negative PTB patients who can serve as a source of infection. We investigated whether screening people who sought healthcare for cough of any duration can increase TB case detection in Ethiopia, and compiled the lessons learned and recommendations.

Methods: We carried out a facility-based study in Ethiopia. All consenting participants who sought any healthcare at the outpatients department, and healthcare facilities for reproductive and child health, anti-retroviral therapy, and diabetes were screened for cough of any duration, and those with cough underwent further investigations using chest radiography (CXR) (except for pregnant women, patients on anti-retroviral therapy, and diabetic patients) and microbiological tests. Confirmed cases were linked to TB treatment following the country's standard guidelines.

Results: We screened 195,713 people who sought healthcare for cough of any duration. Of these, 2647 reported cough symptom of any duration, of whom 1853 underwent further diagnostic tests as they fulfilled the criteria for presumptive TB. Overall, 309/1853 (16.7%) were diagnosed with PTB and linked to TB treatment. Screening by cough of any duration and/or CXR improved TB case finding, and engaging all health teams (administrative and supportive staff, as well as healthcare providers) in the TB screening and diagnosis significantly improved the process.

Conclusion: Screening for TB using cough of any duration and/or CXR for any patient who sought healthcare has the potential to increase both the number of presumptive TB cases and the number of patients diagnosed with and treated for TB in Ethiopia. Such initiatives require strong engagement of facility staff, regular maintenance and calibration of TB diagnostic equipment, and uninterrupted reagent supplies.