Related Experiment Video
Updated: Oct 24, 2025
Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
Published on: November 7, 2018
Changes in the Distribution Pattern of Hepatitis C Virus Genotypes Among Chronic Hepatitis Patients: a
Insights
Hepatitis C virus (HCV) genotype 3a is now dominant in Ahvaz, Iran, replacing genotype 1a. This shift indicates changing transmission routes and migration patterns in the region.
Area of Science:
- Hepatology
- Virology
- Epidemiology
Background:
- Hepatitis C virus (HCV) causes significant liver disease globally.
- HCV genotypes exhibit distinct geographical distributions, influencing clinical outcomes and treatment responses.
- Previous studies identified HCV genotype 1a as dominant in Ahvaz, Iran.
Purpose of the Study:
- To investigate recent changes in the distribution patterns of Hepatitis C virus genotypes in Ahvaz, southwestern Iran.
- To update the epidemiological data on HCV genotypes in this specific geographical region.
Main Methods:
- A cross-sectional study involving 262 patients with chronic Hepatitis C from September 2017 to August 2020.
- Hepatitis C virus RNA extraction and genotyping using the PCR-RFLP method.
- Statistical analysis using SPSS software to assess genotype associations with patient demographics and viral load.
Main Results:
- HCV genotype 3a showed the highest prevalence (48.1%) over the 4-year study period, followed by genotype 1a (46.5%).
- An increasing trend in the prevalence of Hepatitis C virus genotype 3a was observed in recent years.
- Two patient samples were untypeable for Hepatitis C virus genotype.
Conclusions:
- The distribution of Hepatitis C virus genotypes in Ahvaz is undergoing a gradual change.
- Altered HCV transmission routes and increased migration from genotype 3-dominant areas are potential drivers of this shift.
- Continuous epidemiological surveillance is crucial for understanding and managing Hepatitis C virus genotype dynamics.
Background:
Hepatitis C virus (HCV) is a major cause of liver diseases. It has been determined that HCV genotypes have a distinct geographical distribution, clinical outcome, and response to antiviral therapy. Over the past years, many studies have reported that HCV genotype 1a is the dominant genotype in Ahvaz city. In recent years, changes in the distribution pattern of HCV genotypes of different geographical regions have attracted a great deal of attention; hence, the aim of this study was to accurately evaluate such probable changes in Ahvaz in southwestern Iran.
Methods:
This is a cross-sectional study conducted from September 2017 to August 2020, including 262 patients suffering from chronic hepatitis C. HCV-RNA was extracted, and HCV genotyping was performed by PCR-RFLP (polymerase chain reaction-restriction fragment length polymorphism) method. To evaluate the association between HCV genotype, age, gender, and viral load, statistical analyses were done by SPSS software.
Results:
HCV genotyping was done on 260 patients where genotype 3a had the highest prevalence over the period of 4 years with an average of 48.1%, followed by genotype 1a (46.5%). HCV genotype of two patients was not typeable. Although the difference between the two genotypes is currently small, the main result was finding an increasing trend in the prevalence of genotype 3a in recent years.
Conclusions:
The present study showed that the distribution pattern of HCV genotypes is gradually changing among chronic hepatitis C patients in Ahvaz city. The most important cause of such changes could be the alteration in HCV transmission routes and the increase in migration from areas where genotype 3 is dominant.
