Diagnostic Multiplex Assays and Clinical Symptom Trajectories in Community Respiratory Infections

Article Impact Level: HIGH
Data Quality: STRONG
Summary of  JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2026.1426 
Dr. Alastair D. Hay et al.

Points

A primary care clinical trial determined that rapid respiratory microbiological point-of-care tests do not alter overall antibiotic prescribing rates or accelerate patient symptom recovery times.
The multi-center investigation tracked five hundred fifty-two symptomatic patients across sixteen general practices who either received immediate diagnostic testing or conventional routine clinical care.
Data showed that same-day antibiotics were prescribed to forty-five percent of patients in both patient groups with two-thirds designated for immediate household consumption.
Prescriptions were successfully halved among forty percent of patients testing positive for a virus but increased significantly when no respiratory pathogens were detected.
Long-term monitoring through twenty-eight days demonstrated no significant variations between patient cohorts regarding overall symptom severity, secondary worsening, or overall healthcare utilization.

Summary

This study evaluated the efficacy of rapid multiplex microbiological point-of-care testing (RM-POCT) in reducing inappropriate antibiotic prescribing for acute respiratory tract infections in primary care. Conducting a randomized trial across 16 general practices in southwest England, researchers enrolled 552 patients presenting with symptoms such as coughs, colds, sore throats, and otalgia. The investigation sought to determine if immediate, multiplexed diagnostic identification of viral or atypical bacterial pathogens could alter clinical prescription habits and stem the progression of global antimicrobial resistance.

The data revealed that RM-POCT did not modify overall antibiotic prescribing rates, with same-day antibiotics prescribed to 45% of patients in both the intervention and usual care arms. Although antibiotic prescribing was halved within the 40% subgroup of patients who tested positive for a viral pathogen, this clinical reduction was entirely neutralized by a compensatory increase in antibiotic prescribing among patients where no virus or atypical bacteria were detected. Within both operational groups, two-thirds of the total same-day prescriptions were designated for immediate clinical use, while the remaining one-third were structured as delayed pharmacy collection orders.

Patient-reported outcomes demonstrated zero statistically significant clinical differences between the randomized cohorts regarding symptom duration, health-seeking behaviors, or day 2 to 4 symptom severity scores ranging from 0 to 6. Furthermore, downstream analysis from days 2 through 28 showed similar rates of delayed antibiotic prescribing, secondary infections, and total reported antibiotic consumption. The researchers concluded that routine primary care deployment of RM-POCT is currently unwarranted, highlighting that complex diagnostic and behavioral variables drive general practitioner prescribing habits when pathogen panels return negative results.

Link to the article: https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2848651

References

Hay, A. D., Abbs, S., Ridd, M., Granier, S., Lane, J. A., Muir, P., Taylor, J., Young, G., Eastwood, K., Dash, H., Bradshaw, L., Clarke, R., Lui, M., Bridgeman, E., Brierley, R. C. M., Brown, E., Thornton, H. V., Mitchell, P. M., Zhu, L., … Metcalfe, C. (2026). Rapid respiratory microbiological point-of-care testing and antibiotic use in primary care: A randomized clinical trial. JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2026.1426