The
cells within their small intestine are «open» (they have spaces between them) which allows whole proteins and pathogens (amongst other macromolecules) to get into their bloodstream and basically create havoc within their little digestive systems!
It is theorized that either chronic inflammation on the lining of the small intestine, or slower
motility within the small intestine, or both, sets the stage for bacterial overgrowth.
Larvae are released from infective eggs, burrow through the intestinal wall, move through the dog's liver and lungs, are coughed up, swallowed and
mature within the small intestine.
The length of time is key - since it generally would take two hours for the sugar solution to make its way to the large intestine, any rise in these gases prior to that time suggest that the sugar was acted upon by bacteria
within the small intestine.
The SIBO theory for IBS suggests that impairment of the cleansing wave accounts for the proliferation of bacteria
within the small intestine.
As of now, the primary treatment for SIBO is the use of specific antibiotics that are not absorbed at the level of the stomach and therefore act directly on the bacteria
within the small intestine.