Lecture 36: Infectious Diseases Flashcards
1
Q
Symbiosis:
A
- A shared existence between living organisms
2
Q
What’re the three different ways a symbiotic relationship can work?
A
- Mutualism
- Commensalism
3
Q
What happens during mutualism (symbiosis)? Give an example:
A
- Each organism derives a benefit
- Termites, organisms living in gut can break down cellulose
4
Q
What happens during commensalism (symbiosis)? Give an example:
A
- One organism usually benefits and the other is not harmed or helped in any significant way
5
Q
Bacteria populations that colonise your body are influenced by…
A
- How you were born
6
Q
What are opportunistic pathogens?
A
- Commensal bacteria that are part of the normal microflora that become harmful
- They can suppress the immune system
7
Q
Koch’s postulates:
A
- 4 separate phases
- Identify
- IIesolate
- Transmit
- Reisolate
8
Q
Esceptions to Koch’s postumates:
A
- Syphilis
- Cannot grow the organism in the laboratory
- Diseases caused by combinations of pathogens
9
Q
Pathegenicity:
A
- Ability to cause disease
10
Q
Virulence:
A
Ability to infect hosts
11
Q
What are endotoxins?
A
- Found mainly in negative gram bacteria
12
Q
What do endotoxins cause?
A
- Inflammation, bacteria
13
Q
What are some examples of physical adhesins?
A
- Pili (Fimbriae)
14
Q
What is an example of chemical adhesins?
A
- Binding to tissue receptors
- Surface lichens
15
Q
What is clostridium cotulinum?
A
- Most potent neurotoxin
