Lisa's microbial world
Terms
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- Do prokayote cells have a nucleus?
- No
- What is the most critical step in killing an infecting bacteria?
- Classifying the bacterium (organism)
- How can we use metabolism to ID a bacteria?
- By testing the growth on a particular medium we can tell what sugars the bacterium metabolizes to identify what type of bacteria it is.
- How is oxygen involved in IDing an organism?
- Learning about whether or not the bacterium requires oxygen to live can help identify the organism.
- What two pieces of information do you get from putting antibiotics in a petree dish with bacterium?
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A zone a clearing will appear if the AB killed the bacterium. So we will then know:
1. what AB kills that type of bacteria
2. diameter of the clearing to determine the strength of the AB - How do you test to see if a bacteria is anaerobic or aerobic?
- Place the bacteria in with oxydases after you ran a gram stain.
- Symbiotic relationship
- two species both benefit or are mutually dependant
- Example of symbiotes
- Human and E. Coli
- Commensal relationship
- only one of two species benefits but the other does not suffer
- Example of commensal species?
- Human and bacteriodes
- Parasitic relationship
- one species derives its nutrients from and at the expense of another organism
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VIP
What is the difference between an obliigative parasite and a facultative? - In an obligative parasite the parasite requires the host to survive. And in a facultative the parasite does not require the host to survive.
- Compare strict/primary pathogens to opportunistic pathogens:
- Strict/primary pathogens are infective to healthy hosts while opportunistic are only infective to a host that is already compromised
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What causes the most deaths: Infectious disease?
Circulatory syst disease?
Cancer? - Infectious disease 33%
- Where are five preferred niches of bacteria where they actively proliferate?
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1. skin
2. upper respiratory tract (nose, oropharynx)
3. upper digestive tract (mouth and large intestine)
4. urinary tract
5. genital system - What are four regions of transitory proliferation of bacteria that is suggestive of disease?
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1. urinary system
2. uterus
3. rest of respiratory tract (other than mouth and oropharynx)
4. rest of GI tract (other than mouth and large intestine) - What four regions are normally sterile and if bacteria are found in there is a major problem?
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1. blood
2. cerebrospinal fluid
3. synovial fluid
3. deep tissues