A scientist testing a sample suspected of containing a bacterial toxin. Original image sourced from US Government… https://www.rawpixel.com/image/2288529/free-photo-image-pipette-medical-test-tubesFree Image from public domain licenseA scientist preparing samples for mass spectrometry in order to determine the presence of a bacterial toxin. https://www.rawpixel.com/image/2288538/free-photo-image-spectrometry-pipette-bacterial-toxinFree Image from public domain license