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Classes of Microorganisms

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Classes of Microorganisms 2.02 Understand infection control procedures * 2.02 Understand infection control procedures Classes of Microorganisms Non-pathogenic normal ... – PowerPoint PPT presentation

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Title: Classes of Microorganisms


1
  • Classes of Microorganisms

2
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)

3
Classes of Microorganisms
  • Aerobic
  • requires oxygen to live
  • Anaerobic
  • does not require oxygen to live

4
Classes of Microorganisms
  • 6 classes of microorganisms
  • Bacteria
  • Protozoa
  • Fungi
  • Rickettsiae
  • Viruses
  • Helminths

5
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

6
Classes of Microorganisms
  • Bacteria
  • Cocci-
  • round in shape
  • diplococci
  • streptococci
  • staphylococci

Streptococci
Staphylococcal clusters
7
Classes of Microorganisms
  • Bacteria
  • Bacilli
  • rod shape
  • single
  • pairs
  • chains
  • may have flagella
  • may form spores
  • difficult to treat

8
Classes of Microorganisms
  • Bacteria
  • Spirilla
  • spiral or corkscrew shape
  • vibrio
    - spirochete

Treponema pallidum
Cholera
9
Classes of Microorganisms
  • Bacteria
  • Some bacteria develop resistance to antibiotics
  • Very difficult to cure
  • Methicillin-resistant Staphylococcus (MRSA)
  • Multidrug-resistant Staphylococcus (MDSA)

10
Classes of Microorganisms
  • Protozoa
  • One celled, animal-like organism
  • Contain a nucleus and other defined organelles

11
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

12
Classes of Microorganisms
  • Fungi

13
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

14
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

15
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

16
Classes of Microorganisms
  • Bacteria
  • Protozoa
  • Fungi
  • Rickettsiae
  • Viruses
  • Helminths
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