E. Coli – Escherichia coli, better known as E. Coli, is a group of bacteria, some of which can be quite aggressive. They live in poop, and contaminate things that contact that poop – for example, workers’ hands or manure used as fertilizer. Though typically associated with food and water contamination, cannabis plants can also be contaminated with E. Coli, as researchers at the University of New Haven confirmed in 2013. E. coli can cause many types of infection, and is most often associated with diarrheal illness. Additionally, E. coli lung infections can be quite dangerous.