Abstract
The use of natural polysaccharides such as chitosan has recently been widely used as systems for specific colon drug delivery. This is due among other things, the presence in the colon of a specific microflora which consists of a large number and variety of bacteria capable of secreting a wide range of different enzymes, for example, ²-glucuronidase, ²-xylosidase, ±-arabinosidase, among o…