Diabetes and Infections: Overlooked Risks Demand Global Guideline Update

A significant new study published in the journal *Diabetes* and presented at the American Diabetes Association Scientific Sessions conference highlights that infections pose a major, yet often overlooked, health hazard for individuals with diabetes and even prediabetes. The research, one of the largest to date, reveals that people living with type 1 diabetes, type 2 diabetes, and prediabetes face substantially higher risks of infection compared to those without the condition. These risks span infections managed in primary care, those requiring hospital admission, and ultimately, deaths related to infection. The study, led by researchers at City St George's, University of London, utilized anonymized GP records linked to hospital and mortality data from over 800,000 individuals across England living with type 1 diabetes (33,829 people), type 2 diabetes (527,151), or prediabetes (273,216). This extensive cohort was compared against more than one million control subjects matched for age, sex, and ethnicity over a five-year period (2015 to 2019). The findings are stark: individuals with type 1 diabetes exhibited the highest risk, with an 81% higher chance of infection diagnosed and managed by their general practitioner and a staggering 337% higher risk of being hospitalized for infection, compared to those without diabetes. People with type 2 diabetes also faced elevated risks, showing a 51% increased risk for primary care infections and a 91% increased risk for hospitalization due to infection. Even those with prediabetes were found to be at an increased risk, with 35% and 33% higher chances of primary care infections and hospitalizations, respectively. One of the most concerning revelations is that infection was identified as the third most common underlying cause of death in type 2 diabetes, following only cardiovascular disease and cancer. This underscores the critical need for greater attention to infectious complications in diabetes management. Lower respiratory tract infections, such as pneumonia, were the most frequently reported infections requiring hospitalization in both type 1 and type 2 diabetic patients. Sepsis and lower respiratory tract infections were also the leading causes of infection-related mortality in individuals with type 2 diabetes. The study also delved into the role of blood sugar control, revealing a significant link between the level and variation of blood sugar and increased infection risk. In type 1 diabetes, consistently higher blood sugar levels were associated with a heightened risk of infection. For type 2 diabetes, however, it was the fluctuations in blood sugar levels over time, rather than just average levels, that were strongly linked to serious infections necessitating hospitalization. This suggests that even patients with seemingly good average blood sugar control might still be at elevated risk if their glucose levels vary significantly between clinic visits. Experts involved in the study are now advocating for a fundamental shift in clinical practice. They argue that infections should be explicitly considered a "health hazard" for people with diabetes, and current clinical guidelines worldwide fail to adequately reflect this substantial but under-recognized burden of illness, hospitalization, and death. Researchers from City St George's, University of London, are specifically calling for infection prevention, early recognition, and effective management strategies to be integrated into diabetes guidelines, not just in the UK, but globally. This news holds particular relevance for an audience in India, a country grappling with a massive and rapidly growing diabetes epidemic. India is often referred to as the 'diabetes capital' of the world, with an estimated 101 million adults living with diabetes and nearly 136 million individuals in the prediabetes category as of 2026. More than half of these individuals are unaware of their diabetic status, which further exacerbates the risk of health complications, including severe infections. Research from India corroborates the global findings, indicating that diabetes predisposes individuals to infections through compromised immune defenses. Common infections in Indian diabetic patients include skin and soft tissue infections, respiratory tract infections, and genitourinary tract infections. The link between diabetes and infectious diseases like tuberculosis is also particularly strong in India, with diabetes accounting for a significant percentage of pulmonary and smear-positive tuberculosis cases. The COVID-19 pandemic further highlighted this vulnerability, as while diabetes per se didn't increase the risk of contracting COVID-19, it significantly predisposed individuals to severe disease and poorer outcomes. India's healthcare system faces immense pressure from these absolute numbers and the associated complications, especially in rural areas where infrastructure to care for increasing numbers of diabetic patients and their complications is often lacking. Given the bidirectional relationship where infections can worsen hyperglycemia, and uncontrolled diabetes can exacerbate infection outcomes, a holistic approach is crucial. This involves frequent blood glucose monitoring, appropriate medication titration, and close attention to nutritional status to ensure the best possible outcomes. The call to integrate infection prevention and management into global diabetes guidelines is therefore profoundly important for India, where such measures could significantly reduce morbidity and mortality among its vast diabetic population. Enhancing awareness among healthcare workers for earlier recognition and prompt intervention could lead to a reduction in avoidable hospital admissions and deaths, aligning with global efforts to mitigate the evolving diabetes pandemic. In conclusion, the study unequivocally establishes infections as a critical, yet undervalued, complication of diabetes across all its forms. Its findings serve as a powerful impetus for healthcare systems worldwide, including in India, to reassess and integrate robust infection prevention and management strategies into standard diabetes care protocols, ultimately aiming to improve patient outcomes and alleviate the significant public health burden.

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