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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

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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