However, if these bacteria get into the blood, they may cause serious illness and even death. The blood, the spinal fluid and the lymph nodes are sterile and do not have germs. If germs get into these areas, disease and death can occur, often rapidly. Healthful Balance Overgrowth of germs that normally live in the body destroys the healthful balance and allows infection or disease to develop from the overgrowing organisms. Overuse or unnecessary use of antibiotics is not wise.
Bacteria can become resistant to antibiotics as mutation occurs in the bacteria.
The bacteria change in ways that cause the antibiotics to no longer be effective. These resistant bacteria can emerge resistant to one antibiotic or to closely related groups of antibiotics. Balance is also destroyed by germs from a source outside the body that invade the body. The germs that may be normal to one person may not be normal to another person's body and may cause sickness when introduced into another person. This forms the basis for routine hygiene measures such as hand-washing following urination or defecation.