Viral Load of HBV and HCV Correlation to Torque Teno Virus (TTV) Co-Infection in Iraqi Patients

Abstract

Abstract Background: While hepatitis viruses A–E are established, emerging evidence points to additional, novel viral hepatitis agents. The torqueteno virus (TTV) has garnered interest due to its prevalence among patients with hepatitis, suggesting potential hepatotropism. Aim: This study was conducted to detect TTV antigens in individuals infected with chronic hepatitis B (HBV) and/or C (HCV) using molecular diagnostics and to explore any associations between TTV presence and demographic characteristics of the cohort. Materials and Methods: The current study was conducted from the period of September 2022 to April 2023, the investigation involved Iraqi patients aged between 32 and 83 years and diagnosed with HBV and HCV in National Iraqi Central Laboratories, Virology Section. We employed real-time PCR to quantify HBV and HCV viral loads and conventional PCR for TTV DNA detection. Results: TTV DNA was detected in 17 of the 60 patients (28.3%) with chronic HBV and HCV infections. Viral load distribution was found to be similar for both HBV and HCV. An age-related increase in viral load was noted, suggesting a trend where older individuals exhibited higher concentrations. However, no significant variation was observed that could link alterations in HBV and HCV viral loads to TTV status directly. Statistical analysis indicated a positive correlation between age and the likelihood of presenting with the virus, aligning with observed trends in other age-associated chronic conditions, such as Type 2 diabetes mellitus and chronic kidney disease. Conclusion: The presence of TTV in patients with enduring HBV or HCV infection could implicate the virus as a contributing factor to hepatitis pathology. Studies such as this are pivotal for elucidating the age-associated risk profiles for various pathologies and shaping corresponding public health policies and preventative approaches.