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pathogen
any microorganism capable of causing disease
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communicable
transmitted from person to person
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pathogenicity (virulence)
ability to cause disease
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Normal Flora
the bodies own characteristic bacteria
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colonization
microorganisms that are found in the tissues of the host but do not cause symptomatic disease because of normal flora
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Transmission of infection
three things must be present
- reservoir:or source of infectious agent inanimate and animate:person, animal,soil,water,insects
- susceptible host with a portal of entry
- mode of transmission
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exotoxins
- protein molecules released by bacteria to affect host cells at a distant site.
- -botulism, tetnus, diptheria
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endotoxins
- are proteins produced in the cell walls of certain bacteria and released only when the cell lysis
- -typhoid, meningcoccal diseases
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Contact transmission
- -direct:The source and the host have direct contact:skin to skin, membrane/membrane
- -indirect: come into contact with secretions, droplets etc.
- -CDC recommends to stay 3 feet away from pt with droplet infection
- -Precautions:private room, or cohort,wear gloves hand hygeine,gown,dedicate equipment to patient room
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Airbourne transmission
- AIIR handling/N95 respirators: would be used here in order to prevent the suspended particles from infecting others
- precautions:private room required with negative airflow device keep doors closed
- N95 respirators for suspected TB, pt must wear mask if leaving room
- Droplet precaution:private room/cohort, mask when working within 3 feet
- mask when transporting outside of room
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vectors
- insects that go between 2 or more hosts
- -deer tick
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Infections can be prevented in 5 ways
- hand hygeine
- PPE (personal protective equipment)
- Adequate staffing
- disinfection/sterilization
- patient placement and transport
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Alcohol based hand rubs (ABHRs)
ineffective against spore forming organisms such as CDiff
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Sterilization
destroying all living organisms and bacterial spores
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disinfection
does not kill spores and only ensures a reduction in the level of disease causing organisms
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MRSA (Methicillin-Resistant Staphylococcus Aureus
- commonly found on the skin and perineum and in the nose of many people
- spread by direct contact
- susceptible to only a few drugs(Vancomycin and Linezolid)
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physical assessment and clinical manifestations, of infections
fever >101 chills and malaise, lymphadenopathy(enlarged lymph nodes)pharyngitis, and Gi disturbances(diarrhea and vomiting)
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interventions for a person with infection
Monitor temperature, BP, pulse, respiration, skin color/temp, LOC, IandO, seizure activity, WBC, hemoglobinm Hct, administer antipyretic meds, cover the pt with a sheet if appropriate, sponge bathe,incourage fluid intake, encourage proper oral hygiene
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