microbiome/medically important bacteria/ medically important protozoans Flashcards

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1
Q

what is a symbiotic relationship?

A

where different species live closely together and they can be beneficial, neutral, harmful

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2
Q

define mutualism

A

both species benefit

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3
Q

define commensalism

A

one is benefitted the other is not affected

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4
Q

define parasitism

A

one species, the parasite is the only one to benefit

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5
Q

define dysbiosis

A

imbalance of natural microorganisms like bacteria, fungi, viruses that live in the gut for example

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6
Q

define an opportunistic infection

A

microorganism like bacteria, fungi, and viruses taking advantage of a weak immune system

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7
Q

novel pathogens

A

an unfamiliar type of pathogen that is hard to control, and example- covid

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8
Q

what are ways bacteria is helpful medically?

A

digestion
production of medicine
research study
fermentation
biotechnology

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9
Q

how does bacteria help digestion?

A

food is broken down and nutrients good for health are processed

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10
Q

how does bacteria help production of medicine?

A

production of various medicines, antibiotics, insulin, vaccines

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11
Q

how does bacteria help fermentation?

A

bacteria used to ferment food like yogurt and cheese

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12
Q

how is bacteria used in biotechnology?

A

genetic engineering, protein production

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13
Q

what does mechanism of pathogenicity mean?

A

ways in which a microorganism like bacteria or virus causes disease

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14
Q

how is attachment used as a mechanism of pathogenicity?

A

specialized structures of proteins that allow them to attach to specific cells or tissues

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15
Q

how is invasion used as a mechanism of pathogenicity?

A

pathogens can penetrate host cells or tissues by secreting barrier breaking enzymes or exploiting host cell processes

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16
Q

how is toxin production used as a mechanism of pathogenicity?

A

the toxin can harm host cells or tissues leading to development of disease symptoms

17
Q

in mechanisms of pathogenicity how is multiplication & spread used?

A

pathogens can replicate in hosts body increasing numbers

18
Q

despite inflammation being a defensive mechanism what can excessive inflammation do?

A

it can contribute to tissue damage

19
Q

how is destruction of host cells used as a mechanism of pathogenicity.

A

some pathogens directly destroy a hosts cells as a mean to cause tissue damage.

20
Q

what are ways of entry into a host as a mechanism of pathogenicity?

A

mucous membranes
breaks in skin
insect bites
ingestion
direct contact

21
Q

what is an example of entry into a host by mucous membranes

A

can enter through surfaces by respiration, digestion or reproductive tracts. This can happen when eating, breathing or contact with contaminated substance

22
Q

example of entry into host by breaks in skin

A

skin is cut or injured and pathogens can enter

23
Q

examples of entry into host by insect bite

A

some pathogens transferred from insects like mosquitoes and malaria

24
Q

example of entry into host by direct contact

A

pathogens passed from person to person through direct contact with bodily fluids or surfaces

25
Q

what are medically important protozoans?

A

single celled microorganisms that can cause disease

26
Q

for these medically important protozoans what is the life cycle

A

infection
trophozoite stage
cyst formation
transmission
excystation

27
Q

for the protozoans what is infection?

A

protozoans enter the hosts body by insect bite, direct contact or ingestion

28
Q

for protozoans what is the trophozoite stage?

A

the protozoan starts as a trophozoite and in the feeding stage and multiply by division

29
Q

for protozoans what is cyst formation?

A

when conditions are unfavorable and there is need to survive outside of host it can transform into a cyst with a protective outer shell.

30
Q

for protozoans what is transmission

A

cysts are released from the body by secretion and the cysts can contaminate the environment and be ingested by another host

31
Q

for protozoans what is excystation

A

in the new host the cyst can go back to the trophozoite state and begin to multiply and cause damage to the body

32
Q

for protozoans what is a vector

A

something that passes on the pathogen an example would be a mosquitoe

33
Q
A