Infection Control Module 2: Chain of Infection

What are the chain of infection links? Put the items in the correct order. Below is a sequence of events. Place them in the order they should occur, number 1 being the first item. Select the step number from the drop down next to each item. Items to order: Mode of Transmission Reservoir Portal of Entry Infectious Agent (pathogen) Susceptible Host Portal of Exit

1. Infection Agent (Pathogen) 2. Reservoir 3. Portal of Exit 4. Mode of Transmission 5. Portal of Entry 6. Susceptible Host

Identify the link of the chain of infection that has been broken by the following action: Early recognition of signs of infection and subsequent treatment a. Infectious agent b. Mode of transmission c. Portal of entry d. Portal of exit

a. Infectious agent

What are the following structures examples of? • Respiratory Tract • Gastrointestinal Tract • Mucous Membranes • Skin Lesions/Cuts/Abrasions a. Portals of entry/exit b. Vectors c. Infectious agents d. Modes of transmission

a. Portals of entry/exit

A nurse is working with a patient who has a contagious illness. In recalling the chain of infection, the nurse knows that an environment favorable for the growth and reproduction of a pathogen is referred to as- a. A susceptible host b. A reservoir c. A vector d. A portal of entry

b. A reservoir

Which best describes how athlete's foot is spread to other individuals? a. Inhaling fungal spores in the air b. Having contact with fungus on a shower floor c. Eating food contaminated with fungus d. Swimming in a lake that has large amounts of algae

b. Having contact with fungus on a shower floor

Identify the link of the chain of infection that has been broken by the following action: Handwashing a. Infectious agent b. Mode of transmission c. Portal of entry d. Portal of exit

b. Mode of transmission

Michael has an infection in his sinuses and lungs but has no sick time. He decides to go to work anyway. He is coughing and sneezing the whole shift and only remembers to cover his nose and mouth about half the time. Which link represents the link in the chain of infection in this scenario, placing you at risk of contracting the infection? a. Host b. Reservoir c. Portal of Exit d. Portal of Entry

c. Portal of Exit

Which of the following is NOT a way for a pathogen to enter a new host? a. Penetration b. Inhalation c. Secretion d. Ingestion

c. Secretion

The Chain of Infection is a model of a. How bacteria multiply b. How microorganisms mutate into pathogens c. How an infection affects the immune system d. How pathogens are transmitted to cause infection

d. How pathogens are transmitted to cause infection