Bacteria are found on human skin and in the digestive track. Bacteria can enter other body systems and cause infections or disease. Bacteria can enter the body through a cut in the skin,the respiratory tract or the digestive tract.
Bacteria are found on human skin and in the digestive track.Bacteria can enter other body systems and cause infections or disease.Bacteria can enter the body through a cut in the skin,the respiratory tract or the digestive tract.