Which of the following statements about diverticula is incorrect?

The statement regarding the infection of diverticula with gram-negative bacteria is not accurate. While it is true that diverticulitis, the inflammation of diverticula, can occur and may involve bacteria, it is primarily a polymicrobial infection, which means that multiple types of bacteria can be present. While gram-negative bacteria such as Escherichia coli may be involved, the presence of gram-positive bacteria and anaerobes also plays a significant role. Therefore, stating that "most diverticula in the colon are infected with gram-negative bacteria" simplifies the complexity of the microbiological environment in diverticulitis and does not fully represent the condition.

In contrast, diverticula are typically found in the colon, particularly in areas where the muscle layers are weakest. The association of a low-fiber diet with diverticulosis highlights that inadequate fiber intake can lead to increased intraluminal pressure, fostering the development of diverticula. Additionally, recommending fiber supplements such as psyllium is a well-established guideline aimed at preventing complications by promoting regular bowel movements and improving overall gut health. These practices collectively help manage and mitigate the risk of diverticular disease.