Flashcards in Virus And Bacteria Deck (11):
What are pathogens??
A bacteria/virus that can cause a disease
What is the difference between bacteria and a virus?
Bacteria release toxins and viruses damage our cells
What is bacteria?
They are LIVING cells and can multiply rapidly in favourable conditions
They are SINGLE celled
What are endospores
Dormant forms of bacteria
They form when the bacteria are starved of a particular nutrient, it triggers a survival method and the spores reproduce
They can survive harsh environment, disinfectant won't kill it
Diseases caused by bacteria .....
Why may bacteria by useful?
Helps break down organic matter in soil. E.g. Manure and remains of plants
Helps rabbits and horses digest cellulose in the large intestines
DNA are enclosed in a protein coat
What happens when a virus gets in an animal system
It makes a hundred thousand copies of itself and eventually will fill the host cell and burst it open, the virus is then passed through the blood stream
Why are viruses hard to control
Viruses change their form when attacked, this helps them survive
Viruses are also resistant to antibiotics
How do viruses transmit
Indirect and direct transmission