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MMI 133 > LEC 6 > Flashcards

LEC 6 Flashcards

1
Q

what are 3 types of parasites

A
  1. protozoa
  2. metazoa
  3. ectoparasites
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2
Q

what are protozoa

A

single celled eukaryotes

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3
Q

what are metazoa

A

multi celled eukaryotes

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4
Q

what is a cyst

A

protective layer around PM of protozoa

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5
Q

what is function of cyst

A

protect protozoa from inhospitable enviros

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6
Q

what is example of inhospitable enviro

A

water

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7
Q

why is water considered inhospitable

A
  • hypotonic
  • more particles inside cell
  • less particles outside cell
  • water moves into cell
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8
Q

how does cyst protect protozoa

A

prevent water from entering cell

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9
Q

what is trophozoite

A

growing from of protozoa

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10
Q

how does metronidazole work

A

prevents anaerobic CR

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11
Q

which protozoa have cyst forms that are resistant to chlorine

A
  1. entamoeba histolytica
  2. giardia lambia
  3. cryptosporidum parvum
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12
Q

what are 2 families of tryptosoma

A
  1. brucei

2. cruzi

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13
Q

what does tryptosoma brucei family include

A
  1. T brucei gambinese

2. T brucei rhodesinse

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14
Q

what are 4 types of plasmodium sp

A
  1. P falciparum
  2. P malarie
  3. P ovale
  4. P vivax
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15
Q

what is most dangerous plasmodium sp

A

P falciparum

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16
Q

why is P faciparum most dangerous plasmodium spe

A

affects RBCs of all ages

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17
Q

what are 3 symptoms of malaria

A
  1. fever
  2. chills
  3. organ death
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18
Q

how does organ death occur when you have malaria

A
  1. parasites make RBCs sticky
  2. RBCs collect
  3. RBCs block vessels
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19
Q

what is virulence factor for making RBCs sticky

A

PfEMP1

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20
Q

what are 3 severe consequences of malaria

A
  1. cerebral malaria
  2. anemia
  3. kidney failure
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21
Q

what is gametocyte

A

form of parasite ingested by mosquito

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22
Q

what is sporozoite

A

infectious form of plasmodium species

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23
Q

what are metazoa

A

worms

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24
Q

what are 3 major groups of worms

A
  1. nematodes
  2. trematodes
  3. cestodes / tapeworms
25
what do nematodes contain
digestive system
26
what are 2 categories of nematodes
1. eggs are infectious stage / eggs cause infection | 2. larvae infectious stage / larvae cause infection
27
where does anisakis come from
fish
28
what is elephantiasis
adult worms (blood nematodes) in lymph
29
what is riverblindness
adult worms (blood nematodes) in subcutaneous tissue
30
what are microfilaiae
offspring of adult blood nematodes
31
what are cercariae
larvae form of schistosome
32
what do eggs of schistosome cause
inflammation
33
why do eggs of schistosome cause inflammation
- adult worms hiding under protein coat ==> not exposed to WBC - eggs not hiding under protein coat ==> exposed to WBC
34
what are 3 types of schistosome
1. S hematobium 2. S japonicum 3. S mansoni
35
what kind of parasite is S hematobium
bladder
36
what kind of parasites are S japonicum and S mansoni
intestine
37
what does S shematobium cause
1. badder inflammation | 2. bladder cancer
38
what kind of schistosome can be found in Canada
duck
39
what do duck schistosome cause
swimmer's itch
40
CESTODES where do tapeworms reside
intestines
41
CESTODES what are tapeworms lacking
digestive system
42
CESTODES what do tapeworms rely on for food
host
43
CESTODES what are structural features of tapeworms
1. scolex (head) containing hooks | 2. proglottid (body) containing male and female repro organs
44
CESTODES how do we get infected by cestodes
ingest uncooked meat
45
CESTODES what 2 types of diseases can tapeworm cause
1. intestinal / mild | 2. deep tissue / serious
46
CESTODES what tapeworms cause mild disease
1. pork 2. beef 3. fish 4. rodent
47
CESTODES what tapeworms cause serious disease
1. pork | 2. dog
48
CESTODES what is taenia saginata
beef tapeworm
49
CESTODES what is lifecycle of taenia saginata
1. beef as intermediate host | 2. humans
50
CESTODES what is taenia solium
pork tapeworm
51
CESTODES what is lifecycle of pork tapeworm
1. pork as intermediate host | 2. humans
52
CESTODES what are 2 modes of pork tapeworm infection
1. egg | 2. larvae
53
CESTODES what happens when we ingest egg
larvae encysts in brain
54
CESTODES what happens when we ingest larvae
larvae grow in intestine
55
CESTODES what kind of host are humans to dog tapeworms
dead end
56
ECTOPARASITES what are ectoparasites
parasite that live in skin
57
ECTOPARASITES what are 3 ectoparasites
1. scabies 2. public lice 3. head live
58
ECTOPARASITES what is pathogencity of scabies
1. burrow into skin | 2. lay eggs in burrow
59
ECTOPARASITES what is pathogenicity of lice
1. bite skin 2. suck blood 3. lay eggs in hair shafts

MMI 133 (7 decks)

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