HCV is:
**Core Concept**
Hepatitis C virus (HCV) is a single-stranded RNA virus that primarily causes liver inflammation, leading to chronic liver disease, cirrhosis, and hepatocellular carcinoma. HCV infection is transmitted through blood-to-blood contact, making it a significant public health concern.
**Why the Correct Answer is Right**
HCV infection is characterized by the replication of the virus within hepatocytes, leading to the production of viral proteins and the induction of an immune response. The virus uses the host cell's machinery to replicate its genome, which is a characteristic feature of RNA viruses. The correct answer is a key aspect of HCV's life cycle.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because HCV is not a DNA virus, which would require a different replication strategy.
**Option B:** This is incorrect because HCV is not primarily transmitted through fecal-oral contact.
**Option C:** This is incorrect because HCV is not a retrovirus, which would involve reverse transcription of the RNA genome.
**Clinical Pearl / High-Yield Fact**
HCV infection can lead to the development of cirrhosis and hepatocellular carcinoma, making it essential to screen high-risk individuals, such as those with a history of intravenous drug use or multiple sex partners.
**Correct Answer:** A. HCV is a single-stranded RNA virus.