1. Classes of Microorganisms
2.02 Understand infection control procedures

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)
2.02 Understand infection control procedures

3. Classes of Microorganisms
Aerobic
requires oxygen to live
Anaerobic
does not require oxygen to live
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4. Classes of Microorganisms
Bacteria
Protozoa
Fungi
Rickettsiae
Viruses
Helminths
2.02 Understand infection control procedures

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
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6. Classes of Microorganisms
Bacteria
Cocci-
round in shape
diplococci
streptococci
staphylococci
Streptococci
Staphylococcal clusters
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7. 2.02 Understand infection control procedures
Cocci
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8. Classes of Microorganisms
Bacteria
Bacilli
rod shape
single
pairs
chains
may have flagella
may form spores
difficult to treat
****Escherichia coli
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9. 2.02 Understand infection control procedures
Bacilli
 B. anthracis, which causes anthrax in humans and domestic animals. B. thuringiensis produces a toxin (Bt toxin) that causes disease in insects.
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10. 2.02 Understand infection control procedures
Bacilli
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11. Classes of Microorganisms
Bacteria
Spirilla
spiral or corkscrew shape
vibrio spirochete
Treponema pallidum
Cholera
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12. 2.02 Understand infection control procedures
Spirilla
S. minus => causes a type of rat-bite fever
2.02 Understand infection control procedures

13. Bell Work for Tuesday-HSII
What is the difference between a pathogenic and non-pathogenic microorganism?
What are the three types of bacteria we talked about yesterday (they are classified by their shape/structure)?
What is streptococcal pharyngitis also known as?
2.02 Understand infection control procedures

14. 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

15. Classes of Microorganisms
Protozoa
One celled, animal-like organism
Contain a nucleus and other defined organelles
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16. 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

17. Classes of Microorganisms
Fungi
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18. 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

19. 2.02 Understand infection control procedures
Rickettsiae
Rickettsia species are carried by many arthropods, including chigger, ticks, fleas, and lice, and cause diseases in humans such as typhus, rickettsialpox, Boutonneuse fever, African tick bite fever, Rocky Mountain spotted fever
2.02 Understand infection control procedures

20. 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

21. 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

22. Classes of Microorganisms
Bacteria
Protozoa
Fungi
Rickettsiae
Viruses
Helminths
2.02 Understand infection control procedures