Classes of Microorganisms
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Classes of Microorganisms. Classes of Microorganisms. Non-pathogenic normal do not produce disease beneficial Pathogenic cause infection and disease May be non-pathogenic in one body system, pathogenic in another (E. coli ). Classes of Microorganisms. Aerobic requires oxygen to live

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Classes of Microorganisms

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Classes of microorganisms

Classes of Microorganisms

2.02 Understand infection control procedures


Classes of microorganisms

Classes of Microorganisms

  • Non-pathogenic

    • normal

    • do not produce disease

    • beneficial

  • Pathogenic

    • cause infection and disease

  • May be non-pathogenic in one body system, pathogenic in another (E. coli)

2.02 Understand infection control procedures


Classes of microorganisms1

Classes of Microorganisms

  • Aerobic

    • requires oxygen to live

  • Anaerobic

    • does not require oxygen to live

2.02 Understand infection control procedures


Classes of microorganisms2

Classes of Microorganisms

  • 6 classes of microorganisms

    • Bacteria

    • Protozoa

    • Fungi

    • Rickettsiae

    • Viruses

    • Helminths

2.02 Understand infection control procedures


Classes of microorganisms3

Classes of Microorganisms

  • Bacteria

  • Often considered the causes of disease

  • Certain bacteria

    • produce antibiotics

    • live in the body without problems

    • live on the roots of certain plants, converting nitrogen into a usable form

    • help break down dead organic matter

  • Classified by shape and arrangement

  • Treated with antibiotics

2.02 Understand infection control procedures


Classes of microorganisms4

Classes of Microorganisms

  • Bacteria

    • Cocci-

      • round in shape

        • diplococci

        • streptococci

        • staphylococci

Streptococci

Staphylococcal clusters

2.02 Understand infection control procedures


Classes of microorganisms5

Classes of Microorganisms

  • Bacteria

    • Bacilli

      • rod shape

        • single

        • pairs

        • chains

      • may have flagella

      • may form spores

        • difficult to treat

2.02 Understand infection control procedures


Classes of microorganisms6

Classes of Microorganisms

  • Bacteria

    • Spirilla

      • spiral or corkscrew shape

        • vibrio - spirochete

Treponema pallidum

Cholera

2.02 Understand infection control procedures


Classes of microorganisms7

Classes of Microorganisms

  • Bacteria

  • Some bacteria develop resistance to antibiotics

  • Very difficult to cure

    • Methicillin-resistant Staphylococcus (MRSA)

    • Multidrug-resistant Staphylococcus (MDSA)

2.02 Understand infection control procedures


Classes of microorganisms8

Classes of Microorganisms

  • Protozoa

    • One celled, animal-like organism

    • Contain a nucleus and other defined organelles

2.02 Understand infection control procedures


Classes of microorganisms9

Classes of Microorganisms

  • Fungi

    • organisms that usually enjoy a symbiotic, but sometimes parasitic relationship with their host

    • provide numerous drugs and foods

    • provide bubbles in bread, champagne, and beer

    • cause a number of plant and animal diseases

    • fungal diseases are very difficult to treat

2.02 Understand infection control procedures


Classes of microorganisms10

Classes of Microorganisms

  • Fungi

2.02 Understand infection control procedures


Classes of microorganisms11

Classes of Microorganisms

  • Rickettsiae

    • rod-shaped, parasitic bacteria

    • live in the tissues of ticks, fleas, and lice

    • transmitted to humans through bites

    • invade the new host from within

2.02 Understand infection control procedures


Classes of microorganisms12

Classes of Microorganisms

  • Viruses

    • small, infectious agent

    • requires a host for survival

    • over 5,000 types

    • can combine in multiple ways to produce a wide range of diseases

    • produce immune response in humans

    • treated with antiviral drugs

2.02 Understand infection control procedures


Classes of microorganisms13

Classes of Microorganisms

  • Helminths

    • Parasitic worm-like organisms

    • Live inside the host

    • Feed off their host

    • Disrupt nutrient absorption

    • Lead to weakness

    • Excrete toxins making host susceptible to other diseases

    • Approximately 30 billion people globally are infected

2.02 Understand infection control procedures


Classes of microorganisms14

Classes of Microorganisms

  • Bacteria

  • Protozoa

  • Fungi

  • Rickettsiae

  • Viruses

  • Helminths

2.02 Understand infection control procedures


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