chain of infection
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Chain of Infection. Ms. Kelly 8 th Grade Health. Journal:. Based on what you read in the “Chain of Infection” article, in your own words, describe why and how we get sick. The Six Links…. Pathogen Reservoir Place of Exit Method of Transmission Port of Entry Susceptible Host. - PowerPoint PPT PresentationTRANSCRIPT
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Chain of InfectionMs. Kelly
8th Grade Health
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Journal:Based on what you read in the “Chain of Infection” article, in your own words, describe why and how we get sick.
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The Six Links…• Pathogen• Reservoir• Place of Exit• Method of Transmission• Port of Entry• Susceptible Host
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Reservoir• The place for a pathogen to live
and grow– Direct transmission:
Human or animal body (host)– Indirect transmission: Contaminated food or water
Animal/insectInfected soil
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Place of Exit• Ways pathogens escape the
reservoir–Mouth– Nose– Broken skin
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Method of Transmission
• A way to get to a new host• Directly– Body fluids (i.e. blood, secretions)
• Indirectly– Intermediate hosts (i.e.
toothbrushes, animals, drinking fountains, food)
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Port of Entry• Ways to enter a new host– Broken skin–Mouth– Nose – Eyes– Genitals– Insect bites
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Susceptible Host• Those that have little (if any)
resistance to the pathogen and thus, lack the ability to fight them off
• Carriers: Those who carry germ, but show no signs or symptoms; can spread disease, but often do so unknowingly
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Do all 6 links need to be connected in order
for a disease to be transmitted?YES
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…if even ONE link is broken, an infection
will not occur!
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Break the Chain…• Kill the pathogen• Prevent contact• Prevent its escape• Prevent Transmission• Block the Ports• Resistant Host
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Kill Pathogen• If you kill the pathogen, you
stop it from spreading• Method– Antibiotics or other medications–Wash hands
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Prevent Contact• By preventing things from
coming in contact with an infected source, the pathogen has no place to escape to
• Method: – Quarantine/
isolate those with disease
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Prevent Escape• If the pathogens cannot get
out of its host, the disease cannot spread
• Method:– Cover your mouth when you
sneeze–Wear a band-aid to cover
wounds
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Prevent Transmission• By not giving pathogens a
means to travel, we can stop the spread
• Method– Kill/control infected
animals/insects– Ensure proper treatment of
sewage– Chlorinate drinking water
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Block the Ports• If you do not have ways for
pathogens to get into a new host, they cannot infect
• Method– Cover wounds– Do not eat “shady” food
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Resistant Host• By making smart choices about
your health and developing a strong immune system, your body can fight off pathogens without you ever feeling sick
• Method– Exercise– Eat well-balanced diet– Get immunizations