Parasitology Flashcards
1
Q
What are genuine parasites?
A
Protozoans & Helminthes
2
Q
What are some features of parasitism?
A
- most can no longer exist out of host
- genomes reduced, some genes lost
- becomes scavengers by necessity
- adapt to particular niches
3
Q
Which is most successful?
A
Toxoplasma gondii
- is a generalist
- over 99% infections don’t promote disease
4
Q
Main aspects of life cycle
A
Invasion - often with species restrictions
Dissemination - multiplication and development
Transmission - optimal adaptations
5
Q
Invasion/transmission via ingestion
A
Cysts - giardia lamblia Pseudocysts - entamoeba coli Spores - toxoplasma Eggs - helminths All are environmental resistant forms adapted for oral infection (food/water/dirty hands)
