SpotLIGHT ⎪ ANTIBIOTIC STEWARDSHIP
Light AI and Global Antibiotic Stewardship
David Bell, MD
The discovery of modern antibiotics stands as one of the most transformative achievements in human history. Before their widespread use, infections such as pneumonia, wound infections, tuberculosis, and strep throat routinely claimed lives, often the lives of children. A walk through any cemetery from the early 20th century makes this painfully clear. Together with improved sanitation and nutrition, antibiotics are a major reason people today live longer, healthier lives.
Yet this medical miracle is under threat.
Antimicrobial Resistance (AMR) occurs when bacteria evolve in ways that render antibiotics less effective or ineffective altogether. This is not a distant or theoretical problem; it is happening now. The World Health Organization identifies AMR as one of the most serious global public health threats of our time.
AMR is thought to be driven largely by antibiotic overuse and misuse. Antibiotics are often prescribed, or requested, for viral infections such as colds, flu, or most sore throats, even though antibiotics have no effect on viruses. Because these medications are generally inexpensive and well tolerated, it can feel harmless to “just in case” prescribe them. Unfortunately, this practice accelerates the development of resistant bacteria, sometimes referred to as “superbugs,” which can spread rapidly through communities and healthcare systems.
Antimicrobial Resistance does not respect borders — Resistant bacteria can emerge anywhere and spread everywhere from urban hospitals to rural clinics and across continents
Group A Streptococcus (GAS), the bacterium responsible for strep throat, illustrates the challenge clinicians face every day. Strep throat is common, especially in children, and when diagnosed correctly, it is highly treatable with penicillin or amoxicillin. Importantly, GAS has not yet shown meaningful resistance to these first-line antibiotics.
However, most sore throats are not caused by strep. They are viral and antibiotics offer no benefit. The symptoms often look the same, and without accurate testing, it can be difficult to tell the difference.
This distinction matters. Untreated strep infections can lead to serious complications, including rheumatic fever, which can cause permanent heart valve damage. Rheumatic heart disease still kills an estimated 200,000 people each year, primarily in low-income countries where access to early diagnosis and antibiotics is limited. Many of those affected are young women, particularly vulnerable during pregnancy due to increased strain on the heart.
At the same time, prescribing antibiotics for every sore throat fuels resistance and puts the effectiveness of these life-saving drugs at risk.
Human ingenuity continues to meet complex challenges. Today, most people carry powerful computers in their pockets, smartphones equipped with high-quality cameras and connected to advanced artificial intelligence systems. AI excels at pattern recognition, often surpassing the human eye.
This capability is now being applied to healthcare. Light AI has developed a smartphone-based application that can accurately distinguish strep throat from viral and other bacterial infection, including COVID-19, within seconds, using only a throat image.
The technology is designed to be used by both health care providers and non-experts, expanding access to reliable screening in settings ranging from North American homes to remote villages in low to middle income countries.
AMR extends far beyond strep throat. According to recent global surveillance data, a significant and growing portion of common bacterial infections no longer respond to standard antibiotics. This trend threatens the safety of routine medical care, from treating pneumonia and wound infections to performing surgeries, or delivering cancer therapy, all of which rely on effective antibiotics.
As physicians, we face a difficult balance: treating bacterial infections early and appropriately, while avoiding unnecessary antibiotic use that harms patients and public health in the long term.
Rapid, accurate identification of strep throat allows us to do two critical things at once: treat patients who truly need antibiotics early and avoid unnecessary antibiotic use in everyone else. This is essential to slowing antimicrobial resistance, preserving the effectiveness of existing antibiotics, and preventing avoidable deaths, both today and in the future.
The battle between humans and microbes will never end. But for more than a century, science has kept us ahead. By combining responsible antibiotic use with modern technology, we can ensure that this trajectory continues protecting one of the greatest medical advances of all time for generations to come.
References
David Bell, MBBS, PhD is a is a clinical and public health physician with a background in internal medicine, population health, modelling and epidemiology of infectious disease.
Previously, he coordinated malaria diagnostics as a medical and scientific officer at the World Health Organization, was Programme Head of Malaria and Acute Febrile Illness at FIND in Geneva, and Director of Global Health Technologies at Intellectual Ventures Global Good Fund in the USA.
He currently consults in biotech and international public health, having authored over 150 publicaitons in global health.