To minimize the risks for our iron chelating bacteria, it is very clear that the best case scenario is the death of our bacteria.With the help of our fault tree, we decided to use a temporary strategy call "flush strategy". However, zero risk does not exist, so we need to give more thought to new ways of improving our system. We propose there some possible improvement for our treatment.
Physical containment
To deliver Iron Coli, we designed a capsule which disolve in the upper intestines. Our bacteria would be trap in the viscous matrice (composed hydroxypropylmethylcellulose) and be evacuated in the bowels. With this physical containment, we limitate the colonization of the upper intestine by Iron Coli and the interaction with other species of the microbiom.
Use of safer chassis
For our experiments, we used common E.coli strain as MG1655, BL21 or TOP10 for pratical reasons. However, for medical implementation, safer strain would be recquired. Here are some chassis, commonly used as probiotic that we could choose: