H-DAWGS WILDLIFE REFUGE

MICROBIOLOGY  As a basic science studies microscopic organisms such as viruses, bacteria, protists, parasites, and fungi.  These are all single-celled organisms.  They infect the human body and cause disease. DISEASE- ANY INTERUPTION OF YOUR NORMAL BODY PROCESSES

VIRUSES  Are microscopic particles that INVADE and DESTROY healthy cells.  Are extremely small. Much smaller than bacteria.  ARE NOT ALIVE!!!! but do affect living things.  They need a host cell.

VIRUSES ARE SPREAD THROUGH  HUMAN CONTACT  WATER  TOUCHING INFECTED SURFACES  INSECT BITES VACCINES AND SOME ANTI VIRAL DRUGS CAN HELP CONTROL THE SPREAD OF VIRAL DISEASES

HOW VIRUSES REPRODUCE THE LYTIC CYCLE Is the cycle by which a virus 1. attaches itself to a host cell, 2. injects genetic material (DNA/RNA), 3.reproduces many times, 4.kills the cell 5.breaks out to start the cycle again.

VIRAL DISEASES VIRUSES CAN CAUSE MANY DISEASES IN HUMANS. EXAMPLES: HIV (AIDS), COLD, FLU (INFLUENZA), MONONUCLEOSIS Viruses cannot be cured with antibiotics. Viruses cannot be cured with antibiotics. There are some new anti-viral medications. VACCINES HELP PREVENT AND CONTROL THE SPREAD OF VIRUSES

ARE VIRUSES LIVING? They contain genetic material and protein. They cannot eat, grow, digest food, or use oxygen. They cannot function on their own. They must live inside of a living cell. A living thing that a virus or parasite lives in is called a host. Like living organisms, they reproduce

SHAPES OF VIRUSES Shapes: crystals, cylinders, spheres, spacecraft ( GO TO PAGE 619 IN TEXTBOOK AND DRAW THE FOUR SHAPES OF VIRUSES) ( GO TO PAGE 619 IN TEXTBOOK AND DRAW THE FOUR SHAPES OF VIRUSES)

BACTERIA  Single-celled, no nucleus (PROKARYOTE), are the smallest LIVING organisms.  Are found everywhere: air, water, soil, inside of your body and on your skin.  They multiply very rapidly under favorable conditions and form colonies of millions of cells.

BACTERIA  Are classified based on their shape (3 types):

BACTERIAL DISEASES RABIES RABIES LYME DISEASE LYME DISEASE BACTERIAL MENINGITIS BACTERIAL MENINGITIS LEPROSY LEPROSY SINUS INFECTION SINUS INFECTION STREP THROAT STREP THROAT TUBERCULOSIS TUBERCULOSIS

FIGHTING DISEASES  ANTIBIOTICS FIGHT BACTERIAL DISEASES. (antibiotics can only kill living organisms)  VACCINES HELP TO PREVENT VIRAL DISEASES

ANTIBIOTIC RESISTANCE  Occurs when we overuse antibiotics.  Some bacteria will survive and produce new bacteria that resist antibiotics.  This makes treating bacterial diseases difficult when bacteria are not affected by the antibiotic

LYSOGENIC CYCLE Genes of a virus stay inactive Then they begin the lytic cycle