The Changing Burden of Multiple Sclerosis in Bahrain, 2013–2026: Foundational Epidemiology, Contemporary Registry-Based Case Ascertainment, and Genetic Insights in a Changing Arabian Gulf MS Landscape
This study demonstrates that while Bahrain's clinically recognized multiple sclerosis prevalence more than doubled between 2013 and 2026 due to improved case ascertainment and survival, the annual incidence rate remained relatively stable, highlighting the need for integrated national registries to better understand the disease's evolving burden and genetic determinants in the Gulf region.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Multiple sclerosis is a condition where the body's own immune system mistakenly attacks the protective coating around the nerves in the brain and spinal cord. This damage disrupts the signals traveling between the brain and the rest of the body, leading to problems with movement, vision, and sensation. For decades, doctors believed this disease was rare in the Arabian Gulf, a region characterized by intense sunlight and high temperatures, which were thought to offer some natural protection. However, as medical care has improved and diagnostic tools have become more advanced, researchers in the Gulf have begun to see a different picture. They are finding that the disease is not only present but is becoming increasingly common, prompting a closer look at why this shift is happening and what it means for the people living there.
In Bahrain, a small island nation in the Gulf, a team of researchers has just completed a significant update on the burden of multiple sclerosis. They looked back at data collected between 2011 and 2013, a time when the country established its first official record of patients, and compared it with a fresh count of patients being treated today. The study reveals that the number of Bahraini citizens living with the disease has nearly doubled in just over a decade. In the early 2010s, the researchers identified 287 people with the condition. By March 2026, that number had grown to 876 actively followed patients. When translated into a rate per 100,000 people, the estimated prevalence rose from roughly 60 cases to about 117 cases. This jump suggests that the disease is now a much more visible part of the national health landscape than it was previously.
Despite this sharp rise in the total number of people living with the disease, the rate at which new cases appear each year has remained surprisingly steady. Between March 2025 and March 2026, the medical centers in Bahrain recorded 48 new diagnoses. This translates to an annual incidence of about 6.4 new cases per 100,000 people, a figure that is very close to the rate of 5.8 per 100,000 recorded during the 2012–2013 period. This pattern tells an important story: the explosion in the total number of patients is not being driven by a sudden surge in new infections or a new environmental trigger causing a wave of fresh diagnoses. Instead, the growth is likely due to a combination of factors, including better detection, improved survival rates, and the fact that people are living longer with the condition. As diagnostic tools like magnetic resonance imaging became more accessible and specialists became more skilled at spotting the disease early, more people who might have previously gone undiagnosed were added to the registry.
The researchers also examined the characteristics of the patients to understand the local picture better. The disease affects women more frequently than men, with a ratio of nearly three women for every man. The average age when symptoms first appear is around 35 years old, which is typical for the condition globally. The study also looked at potential risk factors that are relevant to the region. A very high percentage of the patients tested had low levels of vitamin D, a nutrient the body makes when skin is exposed to sunlight, which is paradoxically scarce in this sun-drenched region due to lifestyle and cultural factors. Additionally, the study noted that a majority of patients had been exposed to the Epstein–Barr virus, a common infection that has been linked to the disease in many parts of the world. The researchers also identified specific genetic markers that appear more often in Bahraini patients than in other populations, suggesting that local genetic traits might interact with environmental factors to influence who develops the disease.
This work does more than just count patients; it highlights a major shift in how the Gulf region is understood medically. For a long time, the Arabian Gulf was considered a low-risk area for multiple sclerosis. The new data, which aligns closely with similar findings in neighboring Qatar, confirms that the region has undergone a significant epidemiological transition. The disease is now established as a moderate-to-high prevalence condition. The researchers emphasize that while they have a much clearer picture of how many people are affected, they still need to understand exactly why the numbers are rising. They call for a more sophisticated national system that can track patients over time, recording not just their diagnosis but also their treatment, their genetic makeup, and their exposure to environmental factors like vitamin D levels and viral infections.
The study concludes that the increase in the number of people living with multiple sclerosis in Bahrain is a real and substantial change, but it is likely the result of better care and longer survival rather than a sudden spike in new cases. By moving from a simple count of patients to a detailed, long-term tracking system, Bahrain aims to build a foundation for future research. This will help doctors in the region and beyond understand how genetics, environment, and modern lifestyle changes combine to shape the future of this complex disease. The ultimate goal is to use this knowledge to improve care, predict who might be at risk, and develop better treatments tailored to the specific needs of the Gulf population.
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