Pathogens Mind Map

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  • Created by: MrChilly
  • Created on: 08-04-14 13:22
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  • Pathogens
    • What makes a microorganism a pathogen?
      • It must gain entry to a host
        • Pathogens can enter the body through gas exchange surfaces
          • Alveoli
            • The gas-exchange system
              • Pathogens can enter the body through gas exchange surfaces
                • Alveoli
                  • The gas-exchange system
                    • Cell Surface Membranes
                • Gills
                  • Cell Surface Membranes
            • Gills
            • How do microorganisms get into the body?
              • The digestive system
                • Food and Water can carry pathogens
                • It must gain entry to a host
                  • How do microorganisms get into the body?
                    • The digestive system
                      • Food and Water can carry pathogens
          • It must colonize the tissues of the host
          • Resist the defenses of the host
          • Cause damage to the host tissues
          • Bacteria
            • Fungi
              • What makes a microorganism a pathogen?
                • It must colonize the tissues of the host
                • Resist the defenses of the host
                • Cause damage to the host tissues
                • Bacteria
                  • Fungi
          • What is disease?
            • Disease is not a single thing, but rather a description of certain symptoms
          • Pathogens Include
            • Viruses
            • Natural defenses against pathogens
              • Mucus layer
              • Production of Enzymes
              • Production of Stomach Acid
            • How do Pathogens cause disease?
              • By damaging host tissues
                • Sheer number of pathogens causing damage, this prevents tissues from functioning properly, viruses inhibit the synthesis of DNA, RNA and proteins by the host cells. Many pathogens break down the membranes of the host cells
              • By producing toxins
                • Most bacterial pathogens produce toxins. The cholera bacterium produces a toxin that leads to excesses water loss from the lining of the intestines
              • How quickly a pathogen causes damage is determined closely to how rapidly the pathogen divides. Pathogens like those causing gastroenteritis divide about every 30 minutes and so symptoms become apparent in 24 hours of infection.
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