Pathogens (Leaving Cert Biology): Flashcards

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Pathogens
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Pathogen definition

Organism/agent causing disease

Six main pathogen types

Prions, viruses, bacteria, fungi, protists, parasites

What prions are

Misfolded proteins that transmit & multiply

Prion disease in sheep

Scrapie

Prion disease in cattle

BSE (mad cow disease)

Prion disease in humans

Creutzfeldt-Jakob disease

Prion disease outcomes

Dementia, typically fatal

What protists are

Single-celled eukaryotes (not plants/animals/fungi)

Malaria-causing protist

Plasmodium species

Sleeping sickness pathogen

Trypanosomes

Where protist diseases are common

Tropical & subtropical regions

5 parasitic animal examples

Roundworms, tapeworms, mites, lice, ticks

Roundworm health effect

Malnutrition

Disease transmitted by ticks

Lyme disease (and others)

How prions multiply

Convert normal proteins to misfolded forms (exponential)

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