[Quantitative study of the bacterial flora of the large intestine of dysenteric swine].

The bacterial flora and the pH of the large intestine of dysenteric swine during acute subacute and chronic phases have been submitted to quantitative and qualitative studies. The methods used are based on primary isolation and differentiation of the bacteria by the use of selective media and the subsequent differentiation using the replica plating technique. The most characteristic changes are the following: 1. A significant increase of the pH of the chyme in the large intestine during acute dysentery 2. A significant increase of and in the colon and cecum during acute dysentery. 3. A significant increase of in the colon and cecum during dysentery. 4. The almost total disappearance of and of the yeasts in the large intestine during acute, subacute and chronic dysentery. 5. A significant decrease of in the cecum, during acute dysentery and of the fungi during subacute dysentery. 6. Decrease of in the colon during acute dysentery. 7. The total quantitative flora of the large intestine do not change very much.