Quantitative tests for HCV RNA are used to:

Quantitative tests for HCV RNA are used to:

• A. determine genotype
• B. monitor hepatitis C patients on antiviral therapy
• C. screen for hepatitis C
• D. differentiate acute HCV infection from chronic HCV infection

Answer: (D)

Quantitative HCV RNA testing measures the amount of virus in the blood and lets you track how it changes over time. The important idea is the time course: in acute infection the virus may appear and then be cleared by the immune system, so RNA may drop to undetectable levels on repeat testing. If RNA remains detectable for an extended period, typically persisting beyond about six months, that indicates persistent infection and points toward chronic hepatitis C. So, using serial quantitative measurements helps distinguish whether an infection is resolving (acute) or persistent (chronic). This test is also valuable for monitoring how well antiviral therapy is working, but for the purpose of differentiating acute from chronic infection, the key is observing whether viremia persists over time.

Quantitative HCV RNA testing measures the amount of virus in the blood and lets you track how it changes over time. The important idea is the time course: in acute infection the virus may appear and then be cleared by the immune system, so RNA may drop to undetectable levels on repeat testing. If RNA remains detectable for an extended period, typically persisting beyond about six months, that indicates persistent infection and points toward chronic hepatitis C. So, using serial quantitative measurements helps distinguish whether an infection is resolving (acute) or persistent (chronic). This test is also valuable for monitoring how well antiviral therapy is working, but for the purpose of differentiating acute from chronic infection, the key is observing whether viremia persists over time.