Sources of Infection and Immune System Overview
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10 Terms
What is a pathogen?
An organism that causes disease
Name the four major causes of pathogens
Bacteria, viruses, fungi, parasites
Why are fungi difficult to treat?
They are often overlooked and effective treamtents are limited
Give examples of parasitic pathogens
Worms and protozoa
Why are parasites challenging for immune cells?
They are macroscopic and much larger than immune cells
What must the immune system be able to do?
Recognise pathogens, avoid self-reactivity, and direct effector responses
Why must the immune system avoid overreaction?
To prevent damage to self or benign antigens
What links innate and adaptive immunity?
Co-ordinated effector mechanisms
What distiguishes vertebrate immunity from other organisms?
Specific adaptive immunity with memory
What cells mediate adaptive immunity?
B and T lymphocytes
Note 
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