Communicable Disease Chain Essay

Communicable Disease Chain

Infectious Agent

• Microbes – All Types
• Pathogenicity
• Invasiveness
• Virulence
• Infective Dose
• Resistance

 

Susceptible Host

• Defense Mechanisms
• Immunity

Natural

Artificial

 

Reservoirs 

• Humans
• Animals
• Plant/Soil

 

Portal of Re-entry 

• Same as Exit

 

Portal of Exit 

• • Respiratory
  • Integumentary
  • Blood
  • GI
  • Sexual

 

Means of Transmission

• • Direct
  • Indirect