Though accidental production of toxins or allergens is a valid concern of GM protesters, conventional plant breeding has achieved this too. (faith.org.uk)
Blocking production of that toxin will be crucial for disease prevention and treatment. (sciencedaily.com)
Bacterial pathogens are well known to cause tissue damage by colonization, induction of intense inflammation, invasion of host cells, and production of toxins [59]. (journals.plos.org)