How long does it take for symptoms of e coli to develop?

A few days: For the most part, E. coli is harmless and even healthy. It is a normal in the intestine; you have had it there your whole life and always will. A few strains sometimes cause disesae, such as severe diarrhea from contaminated food or water. This kind usually causes symptoms within 2-3 days. E. coli is also the most commmon cause of urinary tract infection, also 2-3 days.

E coli: Generally 12 hours but could be more rapid. The outlying time would be about 30 hours. All the best.