biology

pathogens

micro-organism

a very small living organism which cannot be seen with the nake eye

not all micro-organisms are harmful

pathogen

a disease causing micro-organism

examples include:bacteria, viruses, fungi, protisis

pathogens are spread by…

Air, Direct Contact, Animals+Insects (Vectors), Water, Formites, Lifestyle factors (etc hygiene)

Spread of pathogens prevented by…

-hyginene (hand washing etc)

-isolating people with the disease

-destroying animals that carry and spread the disease

-vaccination

Binary Fission

Bacteria reproduce by simple binary fission - splits cell into 2 identical daughter cells

• can divide up to every 20 mins in right conditions

• growth rate impacted by: temperature, nutrients, oxgyen levels, pH

steps to binary fission

• DNA replication

• Elongation of cell

• DNA moves to opposite ends of the cell

• septum/ cell membrane formation in the middle

• Splits into two daughter cells.