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Pathogens and Diseases


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Bacteria
Single celled organism, bigger than viruses, smaller than fungi
Viruses
Extremely small, not whole cells. They reproduce inside other cells, and are not really alive
Fungi
Reproduce by producing spores, some types can causes infections such as athlete's foot
Protozoa
Single celled organism with a nucleus
Pathogens
Harmful micro-organisms
Examples of pathogens spread through water
Cholera, typhoid fever
Examples of pathogens spread through food
Salmonella, E.Coli
Examples of pathogens spread through air
Influenza virus, chickenpox
Example of a pathogen spread through contact
Athlete's foot
Examples of pathogens spread through body fluids
HIV, or any other STI
Examples of pathogens spread through animal vectors
Protozoan (that causes malaria), salmonella
Animal vectors
Animals which spread pathogens
Physical human barriers to pathogens
Skin, respiratory tract is lined with mucus that traps pathogens
Chemical human barriers to pathogens
Tears, contain a chemical called lysozyme that kills bacteria, stomach contains hydrochloric acid
Infectious diseases
Diseases caused by pathogens which are transmitted from one host to another
Antibiotics
Drugs that inhibit or destroy bacteria and fungi
Antibacterials
Drugs that kill bacteria or stop them from growing
Antifungals
Drugs that kill fungi or stop them growing
Antiseptics
Drugs that are used outside the body to preven infection by stopping bactieral growth or destroying bacteria
MRSA
A resistant strain of bacteria that has evolved resistance to antibiotics