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Classes of Microorganisms

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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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Presentation Transcript
slide1

Viruses

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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