Knowledge Organiser chapter 5 - Communicable disease Flashcards
What is a communicable disease?
A disease caused by a pathogen
What is a pathogen?
A microorganism that causes an infectious disease
What types of microorganism can cause disease?
Virus, bacteria, fungi or protists
Define ‘health’
A state of physical and mental well-being
What factors can affect our health?
Diet, stress and life situations
What is a main cause of allergies?
Immune responses caused by a pathogen
How do bacteria make us ill?
They reproduce rapidly in our bodies and produce toxins (poisons) that damage tissue and make us feel ill
How do viruses make us ill?
The reproduce rapidly inside cells causing damage
What ways can viruses be spread?
Air (including droplet), contact and water
How can the spread of disease be prevented?
Simple hygiene, destroying vectors, isolation of infected individuals and vaccination
What type of pathogen causes measles?
Virus
What are the symptoms of measles?
Fever and rash, can be fatal in children
How is measles spread?
Air (droplet inhalation)
How is measles prevented?
Vaccination
What type of pathogen causes HIV/AIDS?
Virus
What are the symptoms of HIV/AIDS?
Flu like symptoms initially followed by damage to the immune system causing other illnesses
How is HIV/AIDS spread
Sexual contact or exchange of body fluids e.g. blood or sharing needles