Please do your own self a favor and get up to date with map. It's a mycobacterium that noticeably infects cattle and had been proven to effect virtually every other animal including sub human primates. This mycobacterium causes johnes disease in cattle which causes inflammation of the intestines, rapid weight loss, and diarrhea. Symptoms very similar to crohns. The mycobacterium is secreted through the milk, excreted onto pastures and rain washes the muck into rivers, and is in the meat of animals too.
Kochs postulates are the globally recognized criteria for determining whether a disease is caused by a certain bacteria or virus. The criteria state that the bacteria must first be isolated from a sick individual, cultured. And then introduced into a healthy subject or animal. Then, if the animal gets sick with the same symptoms, extract that same bacteria again and culture. These are kochs postulates and they have been proven for crohns and map.
For anyone unfamiliar with Koch's postulates:
1) The microorganism must be found in abundance in all organisms suffering from the disease, but should not be found in healthy organisms Note
: It fails the second half of this since it is found in healthy organisms
2) The microorganism must be isolated from a diseased organism and grown in pure culture
3) The cultured microorganism should cause disease when introduced into a healthy organism Note
: Correct me if Im wrong, but I dont think this has ever been done in humans, so it fails here too
4) The microorganism must be reisolated from the inocculted, diseased, experimental host and identified as being identicl to the original specific causitive agent Note
: See second note
Im not saying that it isint the causative factor for Crohn's, Im just saying that based on my understanding, it is waay to early to say it is scientifically proven. If it were, there would be no need for further research and someone would probably have a Nobel prize