Newly found immune cells link strep throat to psoriasis
Medical Xpress
February 20, 2026
AI-Generated Deep Dive Summary
A new study from Karolinska Institutet reveals a surprising connection between strep throat infections and guttate psoriasis, a form of skin inflammation. Researchers have identified how Group A Streptococcus bacteria, responsible for strep throat, can alter the behavior of key immune cells called Th17 cells, potentially triggering sudden outbreaks of psoriasis. This discovery provides insights into how common infections can lead to serious skin conditions, particularly in children and young adults.
The study, published in *eBioMedicine*, highlights that while strep throat is typically a mild infection, it can sometimes provoke severe immune responses. By examining the interaction between the bacteria and Th17 cells, scientists found that these immune cells become overactive when exposed to the bacteria, leading to excessive skin inflammation. This process may explain why individuals with strep throat often develop guttate psoriasis, characterized by small, scaly lesions on the skin.
Understanding this link is crucial for both patients and healthcare providers. For those prone to psoriasis, it underscores the importance of promptly treating strep throat to avoid complications. The findings also open doors for new treatment strategies targeting Th17 cells, which could potentially prevent or manage psoriasis flares triggered by infections. This research not only advances our knowledge of immune-related diseases but also emphasizes the need for early intervention in cases where infections and skin conditions intersect.
In a broader sense, this study highlights how seemingly unrelated health issues can be interconnected. For readers interested in health and medical advancements, it demonstrates the importance of staying informed about emerging scientific discoveries that could impact their well-being or that of loved ones. By unraveling these connections, researchers are paving the way for more effective treatments and preventive measures, ultimately improving quality of life for those affected by conditions like psoriasis.
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Originally published on Medical Xpress on 2/20/2026