Organic Name Reactions for the students and aspirants of Chemistry12th.pptx
HSC Biology 3.2: Pathogens
1. HSC Biology
• Module 3: The Search For Better Health
Students Learn to:
1. Over 3000 years ago
the Chinese and
Hebrews were
advocating cleanliness
in food, water and
personal hygiene
1. • Identify the conditions under which an
organism is described as a pathogen
2.
6. Visible to the naked Eye
TapewormVirus
Prions
Microscopic
7. When are pathogens ‘successful’?
1
Firstly, it depends if the pathogen has enough virulence,
which is how severe and poisonous it can be, and whether
it’s able to produce a disease or not in the body.
2 Secondly, a pathogen can be considered “successful”, if you
want it call it that, if it can enter the body and survive in there.
• Generally, pathogens can’t survive due to the body’s
lines of defence aimed at keeping the bugs out.
• Pathogens can occasionally get in, but they have to
get through 3 lines of defence first.
8. What are the conditions under which an organism is
described as a pathogen?
1
It should be able to move from one
host organism to another, and be
able infect another person.
A pathogen must also be able to
survive the movement from one
host to another.
2