Diseases → communicable / infectious disease. HOW
PATHOGENS SPREAD ?
• Influenzas
• measles
(Tiny droplet that
We cough or Sneeze )
Stop it Spreading :
• washing hands
• cleaning cooking items
• Spreading insecticides
• Malaria Protists • Quarantine /isolate
• vaccination
Microorganism> fungi, bacteria, Protists, Viruses
Through the air Diseases such as influenza and
measles can spread via tiny droplets of saliva that we
expel when we cough or . sneeze
Contaminated water - Diseases such as cholera can
spread through water sources contaminated by the
diarrhoea of infected people.
contaminated food - Diseases such as salmonella are
spread by eating food which has been infected with
salmonella, and then not cooked properly.
Direct contact - Athlete's foot is spread by walking
, barefoot on surfaces contaminated with the fungi.
WHAT ARE VIRUSES :
• Not calls, living ( 10 00 00 x smaller
• called ( organism) than animals cells )
• Can't reproduce by themselves ( damage our cells )
EXAMPLES OF VIRAL DISEASES TOBACCO
MEASLES HIV MOSAICVIRU
S
( TMV )
- Spread by droplets - Affects Plant :
when an infected • TOBACCO
person cough or Sneezes . TOMATO
Photosyn thesis can't
take place .
( not disease )