Classes of Microorganisms Viruses Pathogenic Aerobic Classes of Microorganisms Bacteria Rickettsiae Protozoa Fungi Non-pathogenic Anaerobic Helminths 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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 Non-pathogenic normal do not produce disease beneficial Pathogenic cause infection and disease 2.02 Understand infection control procedures

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 Bacteria Protozoa Fungi Rickettsiae Viruses Helminths 2.02 Understand infection control procedures

2.02 Understand infection control procedures Bacteria Often considered the causes of disease Classified by shape and arrangement Treated with antibiotics 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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

Bacteria Cocci Bacilli Spirilla

2.02 Understand infection control procedures Bacteria Cocci- round in shape diplococci streptococci staphylococci Streptococci Staphylococcal clusters 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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

2.02 Understand infection control procedures Bacteria Spirilla spiral or corkscrew shape vibrio - spirochete Cholera Treponema pallidum 2.02 Understand infection control procedures

2.02 Understand infection control procedures Bacteria Some develop resistance to antibiotics Very difficult to cure Methicillin-resistant Staphylococcus (MRSA) Multidrug-resistant Staphylococcus (MDSA) 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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

2.02 Understand infection control procedures 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 Microorganisms Fungi 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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

2.02 Understand infection control procedures 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

2.02 Understand infection control procedures Viruses produce immune response in humans treated with antiviral drugs Common cold, measles, mumps, chicken pox, AIDS 2.02 Understand infection control procedures

2.02 Understand infection control procedures Helminths Parasitic worm-like organisms Live inside the host Feed off their host Disrupt nutrient absorption 2.02 Understand infection control procedures

2.02 Understand infection control procedures 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 Microorganisms Any Questions? 2.02 Understand infection control procedures