 We have the EHEC, the intero hemorrhagic, so ETEC, these are the classes of the pathogenic ecoli and this ecoli, where are they found in the digestive structs of warm blooded animals. In our digestive struct you have this ecoli and they have another use. Ecoli are used in the drinking water industry as definitive indicator of contaminated water. So when the research I carried in 2013 in the wastewater treatment plant I had to measure the concentration of ecoli in the water because if ecoli are found in drinking water you know that, in any water you know that that water is contaminated.