Original sentence: Nitrites are considered irreplaceable in the prevention of botulinum poisoning from consumption of cured dry sausages by preventing spore germination.This use of nitrite goes back to the Middle Ages, and in the US has been formally used since 1925
Edited sentence: According to meat-processors, this use of nitrite goes back to the Middle Ages.Historians and epidemiologists argue that the widespread use of nitrite in meat-curing is closely linked to the development of industrial meat-processing.In some countries, cured-meat products are manufactured without nitrate or nitrite, and without nitrite from vegetable source.In the US, nitrite has been formally used since 1925.In the US, nitrites are considered irreplaceable in the prevention of botulinum poisoning from consumption of cured dry sausages by preventing spore germination