bacteria and disease

• Symbiosis

  The relation between the indigenous flora and the host
• Parasitism

  A connection in which one organism benefits from another while also harming it
• Contamination

  The presence of organisms outside of the body, such as those found in water, food, and other biological substances
• Mutualism

  A form of symbiosis in which both organisms benefit from the relationship
• Pathogen

  An organism that invades and causes damage or injury to the host
• Pathogenecity

  An organism's ability to cause disease
• Infection

  Pathogenic microorganisms invading the body
• Organism may fail to produce disease when introduced into some other route/pathway

  portal of entry