Seroconversion to positive after a needlestick from a known carrier is less than 1% for which pathogen?

Seroconversion to positive after a needlestick from a known carrier is less than 1% for which pathogen?

• A. HBV
• B. HCV
• C. HTLV
• D. HIV

Answer: (D)

When a needlestick exposes someone to blood from a known carrier, the chance of actually becoming seropositive depends on how easily the pathogen can be transmitted through that route. HIV has the lowest per-exposure risk among the common bloodborne pathogens, about 0.3% (well under 1%). That’s why this item notes a seroconversion rate of less than 1% for HIV. In comparison, hepatitis B virus can be highly infectious via needlestick exposure, with a much higher risk if the person is not immune; hepatitis C virus exposure carries a higher risk than HIV (around 1–2% in many estimates), and HTLV transmission via needlesticks is very rare. So the statement aligns with HIV having the least likelihood of seroconversion after a needlestick from a known carrier. Post-exposure interventions can further reduce this risk.

When a needlestick exposes someone to blood from a known carrier, the chance of actually becoming seropositive depends on how easily the pathogen can be transmitted through that route. HIV has the lowest per-exposure risk among the common bloodborne pathogens, about 0.3% (well under 1%). That’s why this item notes a seroconversion rate of less than 1% for HIV. In comparison, hepatitis B virus can be highly infectious via needlestick exposure, with a much higher risk if the person is not immune; hepatitis C virus exposure carries a higher risk than HIV (around 1–2% in many estimates), and HTLV transmission via needlesticks is very rare. So the statement aligns with HIV having the least likelihood of seroconversion after a needlestick from a known carrier. Post-exposure interventions can further reduce this risk.