Hepatitis D co-infection drives earlier, more severe liver inflammation than Hepatitis B alone
A large-scale study of treatment-naïve patients in Mongolia reveals a distinct and more aggressive inflammatory profile in Hepatitis D virus (HDV) co-infection compared to Hepatitis B virus (HBV) monoinfection. Analyzing over 2,300 HDV-positive and 1,500 HBV-positive individuals, researchers found that 78.5% of co-infected patients had elevated alanine aminotransferase (ALT) levels, a key biomarker for liver inflammation. This inflammatory activity was most pronounced in young adults aged 18–20, who had 8.2 times higher odds of elevated ALT than their matched HBV-only counterparts. Critically, ALT levels in HDV co-infection showed a weak correlation with HDV viral load and liver stiffness but no correlation with HBV DNA, underscoring HDV as the primary driver of liver injury independent of cirrhosis status.
Why it might matter to you: This research provides crucial epidemiological data for hepatologists and gastroenterologists managing viral hepatitis, highlighting HDV co-infection as a key risk factor for accelerated liver disease. For clinicians, it reinforces the importance of specific HDV RNA testing in young HBsAg-positive patients with unexplained ALT elevations, even in the absence of advanced fibrosis. The findings could influence screening protocols and prioritize this high-risk group for emerging antiviral therapies targeting HDV.
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