Animal and Plant Pathogens Flashcards
What is a communicable disease?
Caused by another organism which infects another.
What are the infective organisms known as?
Pathogens
What are the type of pathogens?
-Bacteria
-Viruses
-Fungi
-Protoctista
These pathogens are often infectious. What does this mean?
Can be passed from organism to organism.
What is Gram Positive Bacteria?
Appears blue-purple under a microscope after gram staining.
What is an example of Gram Positive Bacteria?
MRSA
What is Gram Negative Bacteria?
Appears red under a microscope after gram staining.
What is an example of Gram Negative Bacteria?
E. Coli
The type of membrane affects what?
How bacteria responds to antibiotics.
What is a small proportion of the types of bacteria?
Are pathogens which cause communicable diseases.
Bacteria are Prokaryotes. What do they not have?
No membrane-bound nucleus or organelles
What are the possible shapes of bacteria?
-rod
-spherical
-comma
spiralled
-cork screw
Bacteria Mode of Action:
What do most bacteria produce?
Toxins that poison or damage the host cells which causes disease.
Bacteria Mode of Action:
How do some bacteria damage host cells?
-By breaking down the cell membranes
-Damage or inactivate enzymes
-Interfere with the host cell genetic material so cells cannot divide
Bacteria Mode of Action:
What are these toxins a by-product of?
The normal functioning of the bacteria.
Viruses Mode of Action:
What does viral genetic material do the the cell?
Viral genetic material gets into host cell and inserts into host DNA
Viruses Mode of Action:
What happens when the virus replicates? And where does it replicate?
In host cells, then burst out and destroys the cell and spread infection