In suspected toxin exposure, antigen detection should be performed in addition to PCR and cultures.

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Combining antigen detection with PCR and cultures provides a fuller picture in suspected toxin exposure. PCR identifies genetic material from the organism, and cultures show viable organisms, but neither proves the presence of the toxin itself or its immediate effects. Antigen detection targets specific proteins or components associated with the pathogen or its toxin, offering rapid, complementary confirmation even when organisms are hard to culture, present in low numbers, or when DNA is degraded. Using all three approaches increases overall sensitivity and speeds up diagnosis, guiding timely treatment and public health actions. Relying on only one method can miss exposure or delay response, so antigen detection is best used in addition to PCR and cultures, not as a replacement.