In evaluating toxin exposure, which statement is true?

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Evaluating toxin exposure relies on directly detecting the toxin itself and identifying the organisms that could produce it. Antigen detection tests target the actual toxin proteins—ricin, SEB, and botulinum—yielding rapid, direct evidence of exposure. When you combine this with PCR and cultures to find replicating BW agents, you get both confirmation of the toxin and information about the potential source organisms, which is crucial for guiding treatment and public health actions. Baseline antibody titers aren’t reliable for acute detection because antibodies take time to develop and may not reflect current exposure, and normal baseline labs do not rule out toxin exposure since patients can be affected even with normal results early on.