Why do we not have issues with the plague anymore? Because of hygiene. Did any of the diseases you mentioned from raw milk cause pandemics? No. Are there other Bacterial diseases that had been local pandemics? Yes. Cholera mainly. Was the transmission mainly from human to human? No, it was usually through contaminated water.

This is very different from the viral pandemics by the like of the Spanish Flu or the SARS viruses. But none of these spread from people eating contaminated food.