Clinic-Based Asthma Screening Boosts Pediatric Case Detection in Primary Care

Why Is Childhood Asthma So Often Missed in Low-Resource Settings?

Asthma is one of the most common chronic diseases in childhood, yet the World Health Organization and Global Asthma Network estimate that a large share of cases in sub-Saharan Africa are never formally diagnosed. Symptoms such as recurrent cough, wheeze, and breathlessness are frequently attributed to repeated viral infections, tuberculosis, or pneumonia, particularly in settings where spirometry and peak flow testing are not routinely available.

Primary care clinicians in many African countries also have limited training in structured asthma assessment, and children rarely undergo proactive screening unless a severe exacerbation prompts a hospital visit. The result is chronic under-treatment, missed school days, and preventable emergency presentations — a pattern the Ugandan trial was specifically designed to address.

What Did the Ugandan Cluster Randomised Trial Show?

The trial, reported in BMJ Open Respiratory Research, randomised primary care health facilities to either standard practice or an intervention that embedded a brief symptom-based screening questionnaire into visits for children and adolescents. Clinicians in intervention clinics were trained to recognise suggestive symptom patterns and to follow a simple diagnostic pathway consistent with Global Initiative for Asthma (GINA) guidance.

Researchers reported a substantially higher rate of newly detected asthma cases in the screening clinics compared with control facilities. Because the intervention relied on low-cost tools and existing staff rather than new equipment, the authors argue it is a pragmatic model that could be scaled across similar primary care networks in other low- and middle-income countries.

What Are the Implications for Global Pediatric Respiratory Care?

The findings reinforce a growing consensus among respiratory health experts, including the WHO and the International Union Against Tuberculosis and Lung Disease, that asthma care in low-resource settings is limited less by the availability of essential medicines — such as inhaled corticosteroids on the WHO Essential Medicines List — and more by undetected disease. Screening that flags likely cases earlier creates the opportunity to start controller therapy and reduce the burden of severe attacks.

For health systems, the trial supports integrating asthma detection into existing child health visits, vaccination appointments, and school-based programmes. If confirmed in larger implementation studies, clinic-based screening could become a cornerstone strategy for meeting global targets on non-communicable disease control in children.