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Year 5 😊✌🏼 > Worms > Flashcards

Worms Flashcards

(48 cards)

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1
Q

Helminths

A

worms

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2
Q

How do worms cause damage?

A

slow: the worm or its eggs attempt to escape

rapid: tissue damage as humans are not the natural host

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3
Q

Types of helminths

A

Cestodes (tape worms)

Trematodes (flukes)

nematodes (round worms)

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4
Q

Cestodes (tape worms)

A

flat and long, segmented

head, neck, segments (oldest segments die and fall off)

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5
Q

Trematodes

A

flat and

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6
Q

Nematodes

A

=round worms

hookworms
ascarids
strongyloides

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7
Q

Pork and Beef tapeworm - hosts

A

definitive host: human

intermediate host: cattle, pigs

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8
Q

Life cycle of pork and beef tapeworm

A
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9
Q

cyctocicosis

A

human develops cysts

by being the accidental intermediate host

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10
Q

cystocircosis

A
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11
Q

hydatid

A

dog tape worm

dogs and foxes are definitive hosts

humans are accidental intermediate hosts

sheep and goats are true intermediate hosts

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12
Q

treatment and prevention - cestodes

A

praziquantel for human tape worms and for dogs

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13
Q

treatment for cysts - cestodes

A

Hydatid: surgery, PAIR, long term albendazole, praziquantel

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14
Q

Treatment of cysticercosis - cestodes

A

albendazole, praziquantel and steroids

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15
Q

prevention of worms - cestodes

A

hygiene
de

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16
Q

Dx of cestodes

A

serology and imaging

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17
Q

Schistosomiasis

A

Helminth disease

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18
Q

How many species of schistosomiasis?

A

4 (africa, SE asia, south/Central America)

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19
Q

Damage by sschistosomiassis

A

XXX

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20
Q

Life cycle of schistosomiasis

Study These Flashcards
A
  1. worms in venus plexuses, produce eggs, eggs migrate through bladder or stool
  2. released into water
  3. in snail
  4. go in through human foot in fresh water
21
Q

Definitive and intermediate hosts of schistosomiasis

Study These Flashcards
A

def: humans

intermediate: snails

22
Q

Diagnosis in Schisto

Study These Flashcards
A

microscopy
- urine: s haematobium
- stool: s mansion, s japonica

serology

biopsy

response to treatment (not in the UK)

23
Q

Treatment of schistosomiasis

24
Q

prevention of schisto

Study These Flashcards
A

HARD

kill snails
destroy snail habitat
mass treatment
interrupt transmission (no swimming, no washing etc)

25
where do adult schisto worms live?
blood vessels
26
schisto - how is disease caused
egg deposition
27
complications of schistosomiasis
28
Soil transmitted helminths
ascaris lumbricoides trichuris trichuria hookworm strongyloides stercoralis
29
ascaris lumbricoides trichuris trichuria hookworm strongyloides stercoralis
30
ascaris lumbricoides trichuris trichuria hookworm strongyloides stercoralis
31
hookworm
32
strongyloides stercoralis
33
with ascaris and with hookworm there is a stage where they migrate through the body
34
How do soil transmitted helminths cause disease?
35
Life cycle of ascaris
1. eggs swallowed with food 2. 3. find their way into duodenum and mature to adults
36
strongyloides
only helminth capable of auto infection xxx
37
life cycle of strongyloides
38
life cycle of strongyloides
39
they can mature into larvae before leaving the rectum ?
40
Filariasis
variety of nematode infections spread by black flies and mosquitoes
41
types of filariasis
lymphatic (Wucherer, Brugia) subcutaneous (Onchocerciasis, Mansonella, Loa loa) serous cavity (Mansonella, dirofilaria, don't really cause many medical problems)
42
River blindess - pathogen
43
diagnosis of filariasis
- find microfilariae (blood film, skin snips) - antibodies (ELISA, IFAT) - XXX
44
life cycle of filariasis
1. larvae enter skin via mosquito 2.
45
Myiasis
parasitisation of human flesh by fly larvae motile maggots under skin
46
main flies in myaisis
Bot (S. America) - sometimes need surgery Tumbu (Africa)
47
Eosinophilia causes
atopy drug allergies ]makignancy (Hodgkins lymphoma, `NHL) SLE and other systemic AID some forms of vasculiti s cholesterol embolisms DON'T FORGET PARASITES soil-transmitted helminths (strongylyloides) schistosomiasis filaria leaking hydatid cysts
48
Does ascaris have a skin stage?
no

Year 5 😊✌🏼 (53 decks)

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