Transmission and stages of disease

presence if microbes

infection that can harm the host

the ability of a pathogenic to infect a host and cause disease

non-living object that can transfer pathogens for a short time

site where microorganism can survive before infecting their host (humans, animals, environment such as food water soil etc)

people who harbour pathogens without showing signs/symptoms

Compromised immune system (older and younger people) where it gains access it normally wouldn’t have access to and when someone is on antibiotics

secretions, blood,vaginal secretions/semen, faeces/urine

conditions of animals that get passed onto humans such as swine flu SARS HIV ebola

can be contaminated by human faeces or animals causing digestive system diseases

harbours fungal (ringworm) and bacterial (clostridium tetenei) pathogens

Direct touching someone indirect standing on needle droplets less than 1 m vertical (mum to baby)

Waterborne faecal matter in water airborne aerosols e.g water droplet clouds and travel more than one metre food borne poor health inspection etc

insect carrying disease causing organism e.g salmonella or malaria

• infectious agent • reservoir • portal of exit • mode of transmission • Portal of entry • host