What is the result of bacteria embedding themselves in the wall of the intestine?

When bacteria embed themselves in the wall of the intestine, the primary consequence is their multiplication, which can lead to diarrhea. This occurs because the presence of these bacteria can disrupt the normal functioning of the intestinal lining. They might damage the cells, interfere with nutrient absorption, and alter the balance of beneficial gut flora. As more bacteria proliferate, they can produce toxins that irritate the intestinal lining and lead to inflammation. This inflammation often results in an increased secretion of fluids into the intestines, causing diarrhea as the body attempts to expel the harmful bacteria and restore balance.

In contrast, increased appetite and weight gain, severe headaches and fatigue, or immediate allergic reactions are not directly caused by bacteria embedding in the intestinal wall. These other options relate to different physiological responses and conditions that do not specifically align with the effects of bacterial colonization in the intestine.