What is the primary systematic screening tool used in health facilities among walk-in patients?

The primary systematic screening tool used in health facilities for identifying potential tuberculosis cases among walk-in patients is the presence of a cough lasting 2 weeks or more. This symptom is a significant indicator of pulmonary tuberculosis, as persistent cough is one of the most common symptoms experienced by individuals infected with TB.

A cough of this duration indicates a chronic respiratory issue, which warrants further investigation for tuberculosis, especially in regions where the disease prevalence is high. Identifying this symptom early allows for timely testing and treatment, ultimately helping to control the spread of tuberculosis within the community.

While other symptoms such as night sweats, unexplained fever, and weight loss can also be associated with tuberculosis, they are typically less specific or may occur later in the disease progression. Coughing for an extended period is a direct sign that leads healthcare providers to consider the possibility of TB more urgently, making it the key screening criterion in health facilities.