Pathogens and Diseases

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 

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