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Parasitology > Helminthes > Flashcards

Helminthes Flashcards

1
Q

All trematodes are hermaphrodite except

A

Schistosoma
Hematobium- vesical plexus(urine)
Mansoni- inferior
Japonicum- superior mesenteric plexus(stools)

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2
Q

Katayama fever is caused by

A

schistosoma mansoni and japonicum

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2
Q

Intermediate host for all trematodes is

A

Snail

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3
Q

Eggs of schistosoma species

A

Hematobium-oval terminal spine
Mansoni- lateral spine
Japonicum -no spine

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4
Q

2nd intermediate host for fasciola hepatica

A

Fresh water plants- cress, water chestnut, caltrops
Also for fasciolopsis buski

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5
Q

Infective form of schistosoma

A

Cercarie

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6
Q

Infective form of fasciola

A

Metacercarie
Also for all other trematodes except schistosoma (cercarie)

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7
Q

Tx for fasciola

A

Triclabendazole

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8
Q

Clonorchis 2nd intermediate host

A

Fresh water fish

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9
Q

Parasite invovlved in pathology of cholangiocarcinoma

A

Clonorchis

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10
Q

Tx for all trematodes except fasciola is

A

Praziquental

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11
Q

All trematodes have operculated eggs except

A

Schistosoma

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12
Q

Intermediate host for diphylobothrium latum

A

1st cyclops
2nd fresh water fishes

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13
Q

Infective form of diphylobothrium

A

Plerocercoid larva

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14
Q

Infective stage of taenia solium

A

Cysticercus cellulosae

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15
Q

Infective stage of taenia saginata

A

Cysticercus bovis

16
Q

Difference between taenia solium and saginata

A

Number of Uterine segments in the proglottids on microscopy
7-15
15-30

17
Q

Only tapeworm which needs only one host

A

Hymenolepis nana( human)

18
Q

Infective stage is filariform larva in

A

Hookworm and strongyloides
By skin penetration

19
Q

Hymenolepis shows autoinfection?

A

Both internal and external

20
Q

Longest round worm

A

Ascaris

21
Q

Smallest round worm

A

Strongyloides

22
Q

Larva currens is caused by

A

Strongyloides

23
Q

DOC for strongyloides

A

Ivermectin

24
Q

Identify _ larve in stools for diagnosis of strongyloides

A

Rhabditiform

25
Q

Trichuris worms reside in

A

Large intestine
Can cause rectal prolapse, colitis

26
Q

Barrel shaped eggs with bipolar mucus plugs are seen in

A

Trichuris

27
Q

Enterobius resides in

A

Large intestine

28
Q

Ascaris and hookworm reside in

A

Small intestine

29
Q

NIH swab or scotch tape test is used for

A

Enterobius
To show eggs in perianal skin

30
Q

Spread by fomites is seen in

A

Enterobius
Also auto and retro infection

31
Q

Time to collect sample for wuchereria

A

10pm to 2am
Or use Hetrazan provocative test during day

32
Q

No nuclei in tip of tail in microfilaria of

A

Wuchereria bancrofti

33
Q

2 nuclei in tip of tail

A

Brugia malayi

34
Q

Onchocera vector

A

Black fly/simulium

35
Q

Onchocera causes

A

River blindness
Hanging groin
Onchoceromata

36
Q

Loa loa has periodicity

A

Diurnal
Produces sheathed microfilaria
Causes calabar swellings

37
Q

DOC loa loa

A

DEC

38
Q

DOC onchocera

A

Ivermectin

Parasitology (1 decks)

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