Pathogens
- Created by: Natasha Granville
- Created on: 24-04-18 18:08
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- Pathogens
- Bacteria
- prokaryotic
- treated by antibiotics
- Viruses
- non-living infectious agents
- attach to host cell
- insert viral nucleic acid
- viral nucleic acid replicates
- viral protein synthesised
- lysis of host cell
- viral protein synthesised
- viral nucleic acid replicates
- insert viral nucleic acid
- Examples
- Tobacco Mosaic Virus
- damages leaves, flowers and fruit of tobacco plants
- Influenza
- kills ciliated epithelial cells in gas exchange system
- leaves airways open to secondary infection
- kills ciliated epithelial cells in gas exchange system
- HIV/AIDS
- When active, HIV destroys T Helper cells
- immune system fails
- opportunistic infections
- immune system fails
- HIV contains reverse transcriptase
- makes DNA version of virus in host cell
- host cell uses this DNA to code for and make new viruses
- makes DNA version of virus in host cell
- When active, HIV destroys T Helper cells
- Tobacco Mosaic Virus
- Fungi
- eukaryotic
- treated by antifungals
- reproduce by sending out hyphae which release spores
- Examples
- Black sigatoka
- caused by Mycosphaerella fijiensis
- hyphae digest plant cells, turning the leaves black
- Ringworm
- caused by Trichophyton verrucosum
- causes grey crusty, infectious circular areas of skin
- Athlete's foot
- caused by Trichophyton verrucosum
- digests skin between the toes
- causing cracking and scaling
- Black sigatoka
- Protoctista
- eukaryotic
- unicellular
- Examples
- potato blight
- caused by Phytophthora infstans
- destroys leaves, tubers and fruit
- Malaria
- caused by Plasmodium
- spread by bites of Anopheles (female mosquito)
- anopheles takes two blood meals
- Plasmodium reproduces inside anopheles
- no vaccine, limited cures
- can control the vector
- caused by Plasmodium
- potato blight
- Bacteria
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