pathogens & diseases Flashcards
(29 cards)
define communicable disease
disease that can be passed from one organism to another - caused by pathogens
define pathogen
microorganism that causes disease
state 4 types of pathogens + examples of each
- virus: HIV, SARS, COVID
- protoctista: Giardia, Plasmodim
- bacteria: MRSA, E. coli
- fungi: Tinia pedis
describe how a virus can damage host tissue
- take over cell metabolism
- use it to make new viruses which burst out of cell, destroying it and spreading to other cells
describe how protoctista can damage host tissue
take over cell but digest and use cell contents as they reproduce - they dont take over genetic material
describe how fungi damage host tissue
digest living cells and destroy them
describe how bacteria damage host tissue
produce toxins that affect host cells/damage them and cause disease
what type of pathogen causes ring rot?
bacterium
what type of pathogen causes TMV?
virus
what type of pathogen causes potato blight?
protoctist
what type of pathogen causes black sigatoka?
fungus
identify host species of ring rot
- potatoes
- tomatoes
- aubergines
identify host species of TMV
- tobacco plant
- tomato
- peppers
- cucumbers
- petunias
identify host species of blight
- potatoes
- tomatoes
identify host species of black sigatoka
bananas
what type of pathogen causes tuberculosis
bacterium
what type of pathogen causes bacterial meningitis
bacterium
what type of pathogen causes AIDS
virus
what type of pathogen causes influenza
virus
what type of pathogen causes malaria
protoctist
what type of pathogen causes ring worm
fungus
what type of pathogen causes athletes foot
fungus
identify the host species of TB
- humans
- cattle
- badgers
- deer
identify the host species of bacterial meningitis
humans
