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The living together of unlike organisms.
Types of symbiosis:
Mutualism is where
both organisms benefit
where one benefits the other receives no significant benefit or harm
where one benefits and one is harmed
define Indigenous microbiota
microbes which live in/on us indefinitely in commensal relationships
3 aspects of Indigenous micrbiota populations?
- -Permanent populations (resident, more or less)
- - Species & pop size mary from person-person
- -can change over time
list 3 types of commensal indigenous microbiota on humans
Bacteria, fungi, protists
-we have more bacteria in/on our bodies than human cells.
define Transient microbiota
Microbes that we pick up from our environment
what types of relationships of transient microbiota do we pick up?
- -commensal (most)
- *we don't want sterile hands, because of good bacteria.
What can the following circumstances cause:
-outgrowth of indigenous microbiotia
-loss of indigenous microbiota-breakdown or suppression of immune system
-medical treatment (antibiotics, anti-inflammatories, immunosuppressors etc)
-injury: burns, wounds, surgery etc
Indigenous microbiota locations
Anywhere where your body interacts with the environment.
The following systems are all places where we can find___
The following environments ____ for microbes to live.
-inhibitory substances (oils, lysozyme)
are hostile environments, or make it hard for microbes to live.
Which body systems does she mention are partially covered in microbiota
Genital, Urinary, & respiratory
Body systems completely covered in microbiota
digestive and skin or integumentary.
2 subsets of microbacteria that adapted to live on skin
- -gram-positive bacteria
- -gram-negative and fungi
established microbial growth
Indigenous microbiota colonize the body, and can cause ____ under certain conditions
- -wound infections
- -acne: pimples
2 main parts of respiratory system
- 1) Upper respiratory tract: mouth nose throat.
- 2) Lower respiratory tract: lungs
where are microorganisms naturally covering in the two parts of the respiratory tract?
Upper respiratory tract. The lower tract should always be sterile (otherwise it's infected).
-aerobic and anaerobic regions
-nutrient (esp. for fermentation)
-Massive numbers and variety of microbes
An excellent environment for many microbes
What 5 body systems should be without indigenous microbiota, or should be sterile?
- 3) circulatory
- 5) skeletal
Pathogens are described as ___ ____, ___ part of indigenous microbiota, & organisms ___ of ___ ___ in host.
- -Parasitic symbionts
- -not part of indigenous microbiota
- -organisms capable of causing disease in host