So before we look at the details of this mechanism of infection, look to actually discuss how these bacterial cells can make their way into the, into our body. So let's suppose we're in some third world country where they basically don't have some type of filtration system that basically filters the drinking water. And so you end up drinking contaminated water or eating contaminated food that contains this bacterial cell. So eventually it makes its way into our stomach. Now in our stomach we have a very low PH, a PH of about two. And so what that means is these bacterial cells will not be able to grow in our stomach.