How is this pathogen controlled in foodstuffs?
Control of C. botulinum in foods requires destruction of the spores through processing (e.g. effective canning at high temperatures for long periods of time) or prevention of bacterial growth through product formulation (e.g. keeping pH below 4.6, reducing the amount of available water), temperature control, or a combination of these factors. Failure of one or more of these control measures, (e.g. cans not being heated sufficiently to kill the spores of Cl. botulinum) may enable the organism to grow and produce the toxin in the food.
What foods are at risk?
Foods that are not acidic (above pH 4.6), have enough available water and have little or no air in them (e.g. certain canned or jarred foods) are susceptible to Cl. botulinum growth. Outbreaks have been recorded in canned food, jarred foods in oil, some fish products and meat/blood sausages amongst other foods. Nearly always, there is a failure of processes like heat or acidification during the production of foods that would normally be expected to make the food safe. Sometimes post-heat process contamination is responsible.
Does cooking kill Cl. botulinum and its toxin?
Normal thorough cooking (pasteurisation: 70°C 2min or equivalent) will kill Cl.botulinum bacteria but not its spores. To kill the spores of Cl.botulinum a sterilisation process equivalent to 121°C for 3 min is required. The botulinum toxin itself is inactivated (denatured) rapidly at temperatures greater than 80°C .
The goal with a hot fill and hold is kill the bacteria AND render the environment such that the spores that have not been killed CANNOT reproduce
FYI the FDA is probably going to also ask for a scheduled process and not just an F value