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communicable diseases (Transmission can occur in a number of important…
communicable diseases
Transmission can occur in a number of important ways
unhypienic food preparation
uncooked food or reheated can cause bacterial diseases like food poisoning
direct contact
Example : like sexual contact or like shaking hands
vector
any organism that can spread a disease is called a vector
water
dirty water can transmit many diseases
Air
when a person who is infected sneezes which can spray thousands of tiny droplets containing the virus
A pathogen is microorganism that causes a disease. there four main types of pathogen
virus
example : HIV potentially leading to aids
example in plants : tobacco mosaic virus
fungi
example : athletes foot
example in plants : rose black spot
bacteria
example : salmonella
Example in plants : Agrobacterium
protists
example : malaria
example in plants : bowny mildew