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Parasitology midterms > lab test 1 > Flashcards

lab test 1 Flashcards

1
Q

what is the host spectrum of Faciola hepatica

A

wide, mostly herbivourous mammals and humans

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2
Q

what are the steps in the lifecycle of F.hepatica

A

MI-SPO-RE1-RE2-CE (miracidium, sporocysts, redia and cercaria)

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3
Q

how is the life cycle of faciola hepatica?

A

indirect

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4
Q

where can you fin the adult form of faciola hepatica?

A

in the bile duct and gall blader

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5
Q

where can you fin the juvienile form of F.hepatica?

A

penetrates the intestines and migrates to the liver via abdominal cavity

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6
Q

what is the primary intermediate host of F. hepatica?

A

galba truncatula (snail)

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7
Q

what is the main source of heavy faciola infection?

A

secondary biotypes

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8
Q

what is the size of the eggs of F.hepatica?

A

120-150µm

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9
Q

what is the colour of F.hepatica eggs?

A

golden yellow

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10
Q

what does the faciola hepatica egg contain?

A

zygote

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11
Q

what surrounds the F. hepatica egg?

A

granulated yolk

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12
Q

zygote containing egg of F. hepatica develops into what?

A

ciliated larva (miracidium) in water usually within 2 weeks

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13
Q

in the body of the snail the first larva turns into what?

A

bladder-like sporocyst

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14
Q

what happens to the cavity of the sporocyst of F.hepatica?

A

third larval form develops by asexual budding (paedogenesis)

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15
Q

in which stage does F. hepatica she their tail?

A

Cercariae

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16
Q

how long does the migration of F. hepatica take in the liver parenchyma?

A

4-6 weeks

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17
Q

how long is the prepatent period of F.hepatica?

A

10 weeks

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18
Q

what are the definative hosts of F. hepatica?

A

all kinds of ruminants, mainly the hollow horned ones (bovine)

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19
Q

what are the most susceptible species for F. hepatica?

A

sheep, goat, rabbit and hare (artificially; mouse)

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20
Q

what are the moderatley susceptible species of Faciola hepatica?

A

cattle, deer, roe-deer, moufflon, buffalo and camel (artificially - guinea pig)

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21
Q

what are the lease susceptible species of faciola hepatica?

A

horse, pig, dog, cat, humans

22
Q

what can the symptoms be of Faciola hepatica acute form?

A

rapid weight loss, sudden death

23
Q

what colour are the mucous membranes in the case of sub acute faciolosis?

A

pale

24
Q

what can the symptoms of sub-acute faciola hepatica?

A

severe anaemia, bottle jaw

25
Q

what can be the symptoms of chronic form faciola hepatica?

A

submandibular oedema, cachexia

26
Q

F. hepatica in case of acute form the young flukes can be found in?

A

liver parenchyma

27
Q

F. hepatica in case of chronic form the flukes can be found in?

A

biliary ducts and gall bladder

28
Q

what are the steps to the lifecycle of rumen fluke?

A

MI-SPO-RE1-CE (miracidium, sporocysts, redia and ceraria)

29
Q

how is the lifecycle of rumen flukes?

A

indirect

30
Q

how long is the prepatent period of rumen flukes?

A

16-18 weeks

31
Q

where can you find the immature rumen flukes?

A

duodenum, abomasum

32
Q

juvenile form of rumen flukes is found in?

A

duodenum

33
Q

what colour does the eggs of rumen fluke have?

A

they are colourless

34
Q

what is special about the juvenile form of rumen flukes?

A

they never leave the intestinal canal during their route from small intestine to stomach

35
Q

what is the intermediate host for rumen fluke?

A

Galba truncatula for calicophoron species and shells of planorbids act as intermediate hosts for paramphistomum species

36
Q

what is the habitat for the intermediate host of the rumen flukes?

A

they have a wide range of habitats

37
Q

in which animals is the rumen fluke common?

A

wild animals

38
Q

what is the size of the eggs of lancet flukes?

A

40-48µm long

39
Q

when is the miracidium able to hatch in the lancet flukes?

A

if the egg is consumed by a land snail

40
Q

where does the larvae of the lancet fluke hatch?

A

in the intestines of the snails

41
Q

where does the larvae of the lancet fluke develop?

A

in the body cavity of the intermediate host to sporocyst

42
Q

what does the sporocyst of the lancet fluke produce?

A

several generations of other sporocysts

43
Q

cercariae of the lancet fluke have a sharp spine on the tip of the head, what is this called?

A

stylet

44
Q

how does the cercariae of the lancet fluke leave the snail?

A

with the expelled mucous

45
Q

where do juvenile lancet flukes develop into adults?

A

liver, through biliary ducts

46
Q

Approximatley how long is the prepatent period in lancet flukes?

A

7-9 weeks

47
Q

what is the intermediate host for lancet flukes?

A

small landsnails may act as first intermediate host

48
Q

for how long does the infected snail survive in the lancet flukes?

A

1-4 years

49
Q

what is the second intermediate host for lancet flukes?

A

ants

50
Q

how long does the infected ants of the lancet flukes survive?

A

maximum 1 year

Parasitology midterms (5 decks)

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