What distinguishes secondary from primary dengue infection serologically?...

Question

What distinguishes secondary from primary dengue infection serologically?

Accepted Answer

In secondary dengue, IgG is detectable in the acute phase (within 7 days) due to anamnestic response; in primary, IgG appears later (after day 7-10)

Answer

Lower NS1 levels

Answer

Identical serology

Answer

Only PCR can distinguish

Answer

Secondary always has higher platelets

uk-dtmh MCQ (SBA): Primary vs Secondary Dengue Serology