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Microbiology > GI Protozoans > Flashcards

GI Protozoans Flashcards

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Biology 101 flashcards
1
Q

GI flagellates

A

giardia lamblia

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2
Q

GI amoebae

A

entamoeba histolytica

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3
Q

GI sporozoa

A

cryptosporidium parvum
cyclospora cayetenesis
microsporidia

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4
Q

giardia lamblia trophozoite structure

A

sting ray shaped

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5
Q

giardia lamblia lifecycle

A 
ingest cysts
excyst into trophozoite
trophozoites live in duodenum
cysts form in LI
released in stool
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6
Q

most common intestinal parasite in US

A

giardia lamblia

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7
Q

giardiasis incubation period

A

1 - 3 weeks

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8
Q

giardiasis Sx

A

abdominal pain
vomiting
fatty, foul-smelling secretory diarrhea
malabsorb fat and carb (weight loss)

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9
Q

entamoeba histolytica trophozoite structure

A

ingested RBCs inside

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10
Q

entamoeba histolytica lifestyle

A 
ingest cysts (fruit/veggies)
troph in LI
may invade intestinal mucosa - produce cysts
pass in stool
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11
Q

entamoeba histolytica mech

A

cysteine protease - degrade collagen
makes phospholipase - cytoolytic for enterocytes
damage –> inflammatory diarrhea

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12
Q

amoebiasis Sx

A

(85% asymptomatic)
fever, flask-shaped lesions
dysentery (mucous/blood in stool)
extra-intestinal – lung/liver abcesses

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13
Q

crytosporidium parvum oocyst structure

A

acid fast
stain pink
smaller than cyclospora

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14
Q

crytosporidium parvum mech

A

ingest oocytes (cysts) (IMMEDIATELY INFECTIVE)
sporozooites invade enterocytes in SI
secretory diarrhea

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15
Q

crytosporidiosis sx

A

secretory diarrhea
(life-threatening to immunocpomp)
no fever, mucous, blood

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16
Q

cyclospora cayetanensis oocysts

A

have to spend some time in environment befor ecan infect

17
Q

cyclospora cayetanensis mech

A

ingest (mature) cysts
develop in SI
secretory diarrhea

18
Q

cyclosporiasis Sx

A 
secretory diarrhea (severe/prolonged)
weight loss
19
Q

cyclosporiasis incubation period

A

1 week

20
Q

microsporidia charfacteristics

A

smallest eukaryote
intracellular parasite
lack mitochondria

21
Q

microsporidia transmission

A

ingest/inhale spores

Microbiology (6 decks)

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