During the window period of hepatitis B infection, which serologic pattern is observed?

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Prepare for the NBME Microbiology Test. Study with flashcards and multiple-choice questions. Each query comes with hints and detailed explanations. Ace your exam!

Multiple Choice

During the window period of hepatitis B infection, which serologic pattern is observed?

Explanation:
In the window period, the surface antigen (HBsAg) has declined below detection while the surface antibody (HBsAb) has not yet appeared. So the serology shows HBsAg negative and HBsAb negative. The infection is still present, but the immune response is transitioning; the most useful marker at this time is anti-HBc IgM, which is typically positive and indicates acute infection. This window pattern contrasts with the acute phase (HBsAg positive) and recovery (HBsAb positive).

In the window period, the surface antigen (HBsAg) has declined below detection while the surface antibody (HBsAb) has not yet appeared. So the serology shows HBsAg negative and HBsAb negative. The infection is still present, but the immune response is transitioning; the most useful marker at this time is anti-HBc IgM, which is typically positive and indicates acute infection. This window pattern contrasts with the acute phase (HBsAg positive) and recovery (HBsAb positive).

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