Clinical Types of Intestinal Infection

00:01 very careful not to contaminate others with the bacteria in them. So we've now gone through a series of bacteria of various types that cause intestinal infections, let's summarize this so that you can see it all together and try and make sense of it and these tables will be a good place to study this, if you need to remember them. So we've talked about watery diarrhea, or secretory diarrhea, this is again when you have a lot of watery diarrhea, no blood, no pus, no tissue invasion. The site of infection is typically the small intestine, and examples are vibrio cholerae and the ETEC, EPEC and EAggEC strains of E. coli. All of those can cause this watery diarrhea.

00:44 Dysentery, there is much less volume and there is also blood, mucus, pus in the diarrhea and these bacteria can invade and move beyond the initial site, this is typically in the large intestine and this can be caused by shigella. There are also parasites that can cause this infection and if you're interested we can talk about that in the parasite lecture. We have hemorrhagic colitis, caused by EHEC strains of E. coli, again, copious liquid-like diarrhea, but this has blood in it, although there are no cells, no tissue invasion, this happens in the large intestine and again bloody, watery diarrhea, copious diarrhea with blood or pus in it and tissue invasion, this happens in the ileum, in the colon and we talked about strains of salmonella that can do this. There are also other bacteria including Campylobacter and Yersinia that can accomplish similar diseases. So this is a summary of everything on one side, you can see the different ETEC, EPEC, EAggEC strains, the EHEC strains of E. coli, vibrio, shigella and salmonella and exactly what kinds of disease they're causing. Again we have looked at gram-negative rods in this lecture in terms of their effect on the enteric track. We looked at vibrio cholera. We've looked at Escherichia coli strains and salmonella. And I hope after