The most common virus is the common cold, which is actually caused by several different families of viruses. Even though you may experience upper-respiratory symptoms associated with a bacterial infection, most cases of the common cold are not caused by bacteria-which make antibiotics useless against them.
Colon infection is caused when harmful bacteria resides in the colon. Normally, human immune system kills the harmful bacteria but there are some strains of bacteria that grow uninterruptedly even with strong immune system. When such bacteria overgrow in the large intestine, they can cause lot of complication.
A healthy diet can help protect against colon disorders. Just as diet can have a positive or negative impact on heart, brain and bone health, your colon's overall health can be affected by what you eat. The colon is a crucial part of the digestive system, and many different conditions can cause it to work improperly. Some of these include inflammatory bowel diseases, such as ulcerative colitis and Crohn's disease; diverticular disease; irritable bowel syndrome; and colorectal cancer.