Pasteurella multocida- toksinet produceres af en bakteriecelle, der har fået indsat et gen (dna), der sætter den i stand til producere Pasteurella multocida- toksoid, en genetisk modificeret form af toksinet med tilstrækkelig immunogen virkning, men uden toksiske egenskaber.
The Pasteurella multocida toxin is made by a bacterium cell that has received a gene (DNA), which makes it able to produce Pasteurella multocida toxoid, a genetically modified form of toxin which has adequate immunogenic activity and which is free from the toxic properties.