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Viruses. Pathogenic. Aerobic. Classes of Microorganisms. Bacteria. Rickettsiae. Protozoa. Fungi. Non-pathogenic. Anaerobic. Helminths. Remember. What may be non-pathogenic in one body system could be pathogenic in another Example: E. coli. Classes of Microorganisms.

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Pathogenic

Aerobic

Classes of Microorganisms

  • Bacteria

  • Rickettsiae

  • Protozoa

  • Fungi

Non-pathogenic

Anaerobic

  • Helminths

2.02 Understand infection control procedures


Remember
Remember

What may be non-pathogenic in one body system could be pathogenic in another

Example: E. coli

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

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


6 classes of microorganisms
6 Classes of Microorganisms

  • Bacteria Protozoa

  • Fungi Rickettsiae

  • Viruses Helminths

2.02 Understand infection control procedures


Bacteria
Bacteria

  • Often considered the causes of disease

  • Classified by shape and arrangement

  • Treated with antibiotics

2.02 Understand infection control procedures


Certain bacteria
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

2.02 Understand infection control procedures


Bacteria1
Bacteria

Cocci

Bacilli

Spirilla


Bacteria2
Bacteria

Cocci-

  • round in shape

    • diplococci

    • streptococci

    • staphylococci

Streptococci

Staphylococcal clusters

2.02 Understand infection control procedures


Bacteria3
Bacteria

Bacilli

  • rod shape

    • single

    • pairs

    • chains

  • may have flagella -aids in movement

  • may form spores

    • difficult to treat

2.02 Understand infection control procedures


Bacteria4
Bacteria

Spirilla

  • spiral or corkscrew shape

    • vibrio - spirochete

Cholera

Treponema pallidum

2.02 Understand infection control procedures


Bacteria5
Bacteria

  • Some develop resistance to antibiotics

  • Very difficult to cure

    • Methicillin-resistant Staphylococcus (MRSA)

    • Multidrug-resistant Staphylococcus (MDSA)

2.02 Understand infection control procedures


Protozoa
Protozoa

  • One celled, animal-like organism

  • Contain a nucleus and other defined organelles

  • Example: Malaria, amebic dysentery

    • Malaria invades RBC and causes them to rupture

2.02 Understand infection control procedures


Fungi
Fungi

  • enjoys 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 microorganisms2
Classes of Microorganisms

  • Fungi

2.02 Understand infection control procedures


Rickettsiae
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

  • Rocky Mountain Spotted Fever

2.02 Understand infection control procedures


Viruses
Viruses

  • small infectious agent

  • requires a host for survival

  • Seen with electron microscope

  • over 5,000 types

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

2.02 Understand infection control procedures


Viruses1
Viruses

  • produce immune response in humans

  • treated with antiviral drugs

  • Common cold, measles, mumps, chicken pox, AIDS

2.02 Understand infection control procedures


Helminths
Helminths

  • Parasitic worm-like organisms

  • Live inside the host

  • Feed off their host

  • Disrupt nutrient absorption

2.02 Understand infection control procedures


Helminths1
Helminths

  • 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 microorganisms3
Classes of Microorganisms

Any Questions?

2.02 Understand infection control procedures


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