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Micro Biology > Chapter 22 > Flashcards

Chapter 22 Flashcards

1
Q

what are protozon and helaninthic parasits

A

eukaryotes

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2
Q

definitive host

A

harbor parasites until completion of lifecycle

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3
Q

intermediate host

A

harbor asexual parasites until they move to definitive host

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4
Q

how can parasites infect humans. 3 ways

A

ingestion
vector borne transmission
direct contact

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5
Q

what does a giemsa stain do

A

stains parasite for infected blood cell

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6
Q

what are protozoa

A

unicellular eukaryotes

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7
Q

what are the 2 main forms of protozoa

A

trophozoite
cyst

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8
Q

trophozoite stage info

A

feeding and reproducing stage, livins inside host, undergo encystment before leaving host in feces

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9
Q

cyst stage info

A

infective form, survives in the envrionment, underogoes excystation when ingested, developing into trophozoite

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10
Q

what are the 4 protozoan groupings

A

amoebae
flagellates
apicomplexans
cilliates

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11
Q

what are amoebae shaped like

A

no true defined shape

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12
Q

what are 2 types of amoebae

A

acanthamoeba and naegleria

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13
Q

where are acanthamoeba and naegleria found

A

in natural and artificial water systems

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14
Q

what are acanthamoeba dangerous for

A

they can invade the eye and cause brain inflammation and potentially death

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15
Q

what are naegleria dangerous for

A

they are brain eating and may result in a hemorrhage coma or death

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16
Q

what are the 3 talked about flagellates

A

trypanosoma cruzi
trypanosoma brucei
giardia intestinalis

17
Q

what does trypanosoma cruzi cause

A

causes chagas disease and chagomas (swelling)

18
Q

where is t.cruzi prevelant

A

opossums and armadillos are the primary reservoir

19
Q

how is t.cruzi transmitted

A

through an insect bite via kissing bugs.
once inside humans it travels in bloodstream and replicate in cells

20
Q

trypanosoma brucei causes what

A

causes african sleeping sickness

21
Q

where does t. brucei mature and replicate

A

it matures in the salivary gland of the tsetse fly and then gets injected into blood when fly bites, where it then lives and replicates outside hosts cell

22
Q

t. brucei vector

A

the vector is the tsete fly
various animals including humans then serve as a reservoir

23
Q

what does giardia intestinalis cause

A

causes giardiasis , or gastrointinal disease

24
Q

what does giardia intestinalis ingest

A

they ingest cysts from contaminated food, water, and hands.

25
Q

what are apicomplexans

A

parasites of animals

26
Q

life cycle of apicomplexans

A

involves at least 2 types of hosts

27
Q

2 types of apicomplexans

A

plasmodium and toxoplasma

28
Q

what does plasmodium cause

A

malaria

29
Q

what does toxoplasm cause

A

toxoplasmosis

30
Q

what are the 4 species of plasmodium

A

p. falciparum
p. vivax
p. ovale
p. malariae

31
Q

sporozoite develops where

A

in mosquito

32
Q

what does the merozoite do

A

perform the asexual cycle in red blood cells

33
Q

how does one get toxoplasmosis

A

eating undercooked meat that contains the parasite

34
Q

what are reservoirs of toxoplasmosis and what is the definitive host

A

wild and domestic mammals are reservoirs
cats are the definitive host

35
Q

how is the infective form of toxoplasmosis spread

A

through cat feces

36
Q

what are helminthic parasites

A

macroscopic, multicellular, eukaryotic worms

37
Q

do helminthic parasites have simple or complex life cycles

A

comples, they often have intermediate hosts to support the larval stages

38
Q

3 groups of helmenthic parasites

A

cestodes (tapeworms)
trematodes (flukes)
nematodes (roundworm)

Micro Biology (19 decks)

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