1. Viroids and Prions
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2. Viroids Circular RNA molecules Infect plants
Don’t code for proteins– disrupt regulatory systems in plants
Causes growth problems in plants
Hepatitis D viroid causes Hepatitis D in humans (in combination with virus)
Putative secondary structure of the PSTV (potato spindle tuber viroid).

3. Prions Infectious proteins
Misfolded version of a naturally occurring protein in animals
Causes the similar proteins to also misfold

4. Unique pathogens
Do not need to replicate themselves to infect and cause problems
Other infectious particles other than viruses

5. Prion Reproduction
Prions cause other similar proteins to also misfold lose function

6. Animations How Stuff Works Animation