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Medicine

Interpreting Procalcitonin for Bacterial Infection Diagnosis

Quick fact

Procalcitonin levels can rise over 100,000-fold during severe bacterial infection, yet remain low in most viral infections, making it a powerful tool for guiding antibiotic decisions.

Why this is interesting

When you feel feverish and sick, how do doctors know if you have a bacterial infection that needs antibiotics, or a virus that won't benefit from them? Procalcitonin, a simple blood test, can help tell the difference.