13.1 Prin of Infection Control

13.1 Prin of Infection Control - Understanding the...

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Understanding the Principles of Infection Control (How Disease is Transmitted and What Are the Main Ways to Prevent It)
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Microorganism (aka Microbe) Small living plant or animal Not visible to the naked eye Must be viewed under a microscope Found everywhere in the environment, including on and in the human body Many microbes are part of normal flora of the body Beneficial in maintaining certain body
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Microorganism (aka Microbe) Other microbes cause infection and disease Called pathogens or germs At times, a microbe that is beneficial in one body system can become pathogenic in another body system Bacteria called Escherichia coli (E. coli) is part of the natural flora of the large intestine If E. coli enters the urinary system it
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Classifications of Microbes Bacteria Protozoa Fungi Rickettsiae Viruses
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Bacteria Simple one-celled plants that multiply rapidly Classified by shape and arrangement (pg 269) Cocci Bacilli Spirilla
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Bacteria - Cocci Round or spherical in shape Diplococci Cocci that occur in pairs Cause diseases such as gonorrhea, meningitis, and pneumonia Streptococci Cocci that occur in chains Causes diseases such as strept throat and rheumatic fever
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Bacteria - Cocci Staphylococci Cocci occur in clusters or groups Most common pyogenic microbe (pus producing) Causes infections such as boils, wound infections, and toxic shock
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Bacteria - Bacilli Bacteria that are rod-shaped Can occur singly, in pairs, or in chains Many bacilli contain flagella that allow the organism to move Bacilli have ability to form spores or thick walled capsules when growing conditions are poor. Spores are extremely difficult to kill Causes diseases such as
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Bacteria - Spirilla Bacteria that are spiral in shape Also included the comma-shape (vibrio) and corkscrew shaped (spirochete) Causes diseases such as syphilis and cholera
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Protozoa One-celled animals Often found in decayed materials and contaminated water Some protozoa are pathogenic and cause diseases such as malaria, amebic dysentery, trichomonas, and African sleeping sickness
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Fungi Simple plantlike organisms Live on dead organic matter Yeasts and molds are two common forms of fungi that can be pathogenic Often found in decayed materials and contaminated water Causes diseases such as ringworm, athlete’s foot, histoplasmosis, yeast vaginitis, and thrush
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Rickettsiae Parasatic microorganisms Cannot live outside the cells of another
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This note was uploaded on 01/12/2012 for the course CNA 1 taught by Professor Teresabriggs during the Spring '12 term at NorthWest Arkansas Community College.

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13.1 Prin of Infection Control - Understanding the...

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