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DN713 Unit 2 Assignment 1 Worksheet


chain of infection



  1. Complete this worksheet: “Chain of Infection
  2. Each question is assigned a point value with 50 total points possible.
  3. Use at least 3 scholarly references to obtain your information not more than 5 years old, do not use textbook. No plagiarism, original work will be turn in into turnitin not more than 15 percent similarities. Use the upload document for the assignment.

Your writing Assignment should:

  • follow the conventions of Standard English (correct grammar, punctuation, etc.);
  • be well ordered, logical, and unified, as well as original and insightful;
  • display superior content, organization, style, and mechanics; and;
  • use APA formatting and citation style.



  1. Select an infectious disease that you have observed in practice.
  2. Complete the table listed below (20 possible points) including:
    1. Provide detailed information for each component of the chain of infection:
      1. agent;
      2. reservoir(s);
  • portal(s) of exit;
  1. mode(s) of transmission;
  2. portal(s) of entry; and
  3. host characteristics


  1. Include one preventive intervention for each component of the chain.
  1. Use at least 3 scholarly references to obtain your information.
  2. The assignment (table) can be more than one page



Chain of Infection

Description of each Component of the Chain of Infection Potential Interventions

or Prevention








Portal(s) of Exit


Mode(s) of Transmission


Portal(s) of Entry


Host Characteristics