Nursing Review: Chain of Infection




MODE OF TRANSMISSION it indicates the potential of the disease; conveyance of the agent to the host; it can be by common source transmission, contact source, air-borne transmission.

There are four main routes of transmission
  1. By Contact Transmission
            1. Direct contact ( person to person )
            2. Indirect contact ( usually an inanimate object)
            3. Droplet contact ( from coughing, sneezing, or
                            talking, or talking by an infected person)

  1. By Vehicle Route ( through contaminated items)
            1. Food – salmonellosis
            2. Water – shigellosis, legionellosis
            3. Drugs – bacteremia resulting from infusion of a
                                  contaminated infusion product
            4. Blood – hepatitis B,  

        C.    Airborne Transmission
            1.  Droplet of nuclei
            2.   Dust particle in the air containing the infectious
                            agent
            3. Organisms shed into environment from skin, hair,
                           wounds or perineal area.

          D.  Vector borne Transmission, arthropods such as flies, mosquitoes, ticks and others.  

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