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Parasitology, Lec > Strongyloides stercoralis > Flashcards

Strongyloides stercoralis Flashcards

1
Q

common name

A

threadworm

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2
Q

order

A

rhabditida

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3
Q

consider as what kind of disease?

A

neglected tropical disease

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4
Q

further development in a ________________ environment of rhabditiform larva in feces or soil

A

moist

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5
Q

broadly fusiform (0.7-1 mm x 40-50 um)

A

rhabditoid male

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6
Q

two copulatory spicules and gubernaculum

A

rhabditoid male

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7
Q

two-horned uterus or bihornuate uterus

A

rhabditoid female

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8
Q

tail of rhabditoid male

A

pointed and curved ventrad

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9
Q

undergoes 3 molts to form the free-living adult

A

diagnostic stage

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10
Q

difference of rhabditiform larva and hookworm

A

buccal cavity is shorter than hookworm

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11
Q

long esophagus, notched tail

A

filariform larva

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12
Q

used by the larva to enter the cutaneous blood vessels

A

skin penetration

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13
Q

larva are carried to the lungs via the ____________________

A

blood stream

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14
Q

parasite may invade, mature and lay eggs in the stomach or lungs

A

immunosuppresed host

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15
Q

difference of filariform larva and hookworm

A

esophagus of filariform is long and tail is notched

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16
Q

2.7 mm long x 30-40 um wide

A

parisitic female

17
Q

anal opening

A

midventral

18
Q

eggs description

A

thin-shelled, transparent

19
Q

pathways of filariform larva (3)

A

reinfection, immunosuppressed and intestines

20
Q

immunosuppressing initiates what?

A

internal reinfection

21
Q

infective stage of filariform larva

A

skin penetration

22
Q

diagnostic stage

A

most common: rhabditiform larva

23
Q

most prominent lab finding

A

eosinophilia

24
Q

3 phases according to the life cycle

A

cutaneous, pulmonary, intestinal

25
Q

parasite may migrate through the skin and establish invasion in the intestines with ____________________________

A

no lung migration

26
Q

racing larva

A

larva currens

27
Q

coincide with lung migration

A

pulmonary

28
Q

sloughing of mucosa

A

intestinal

29
Q

immunocompromised host + high worm burden

A

hyperinfection

30
Q

lab finding

A

absence of periperal eosinophilia

31
Q

marker of hyperinfection

A

absense of periperal eosinophilia

32
Q

treatment

A

ivermectin and albendazole

33
Q

prevention

A

avoid contact with infected soil

Parasitology, Lec (13 decks)

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