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Parasitology > Test 4 > Flashcards

Test 4 Flashcards

(75 cards)

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1
Q

What is Dirofilaria immitis?

A

canine heartworm

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2
Q

What is the life cycle of the heart worm of the dog and cat?

A

Indirect

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3
Q

Who is the intermediate host for Dirofilaria?

A

mosquito

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4
Q

How long is the pre-patent period for Dirofilaria?

A

6-9 months to mature and reproduce waiting for mosquito to ingest

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5
Q

How long is the adult life of the Dirofilaria?

A

5 years

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6
Q

What are clinical signs of heart worms?

A

decreased stamina, weakness, collapse, chronic cough, edema in abdomen, chest and limbs, death

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7
Q

What do Dirofilaria do to the host?

A

Causes inflammation of arterial wall and obstruct blood vessels

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8
Q

How do you detect heart worms?

A

blood smear, PCV tube, or filter test

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9
Q

What is an occult test for heart worms?

A

antigen test

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10
Q

What is an older method to detect heart worms?

A

Modified Knotts test

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11
Q

What is Trichinella spiralis?

A

Trichina worm

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12
Q

Where do Trichina worm infest?

A

the small intestine

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13
Q

What do Trichina worms produce?

A

large numbers of active larva

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14
Q

What do Trichina worm larva do?

A

penetrate the intestinal wall and travel via the lymph to the blood vessels

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15
Q

What do Trichina worm larva do after they travel to the blood vessels?

A

they eventually encyst in muscle tissue

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16
Q

How long do Trichina worm larva remain viable in the muscle tissue?

A

years

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17
Q

What are clinical signs of Trichina worm in the pig?

A

may not bother but may condemn carcass due to potential danger to human

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18
Q

What are clinical signs of Trichina worm in humans?

A

nausea, diarrhea, pain, possible death from paralysis of resp. muscles

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19
Q

When do you detect Trichina worms?

A

at necropsy or slaughter

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20
Q

How do you control Trichina worms at detection?

A

freezing and cooking thoroughly prior to consumption

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21
Q

What is Macracanthorhyonchus hirudinaceus?

A

thorny headed worm

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22
Q

Is the thorny headed worm a nematode?

A

no

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23
Q

What is the thorny headed worm?

A

Acanthocephalan

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24
Q

Where do thorny headed worms live?

A

small intestine

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25
What do thorny headed worms absorb from the intestinal contents?
nutrients
26
What is the life cycle of the thorny headed worm?
indirect
27
Who are the intermediate hosts for thorny headed worms?
june bug, dung beetle, water beetle
28
What are clinical signs of thorny headed worms in pigs?
stunted pigs, scours, weight loss
29
How do you detect thorny headed worms?
Fecal float or centrifugation
30
What do thorny headed worm ova look like?
oval, contains acanthorlarva surrounded by several layered wall
31
What is Strongyloides ransomi?
intestinal threadworm
32
Where do intestinal threadworms live?
small intestine
33
What is the life cycle of the intestinal threadworm?
direct
34
How are intestinal threadworms transmitted?
ingestion, skin penetration or transmammary
35
What are clinical signs of intestinal threadworms?
cough, muscle soreness, abdominal pain, sudden death, piglets vomit
36
With intestinal threadworms what is the cough due to?
larval migration
37
With intestinal threadworms what is the muscle soreness due to?
larva in SQ fat
38
How do you detect intestinal threadworms?
fecal floatation or centrifugation
39
What do intestinal threadworm ova look like?
dense and embryonated
40
What are some other nematodes of the pig?
whipworm, kidney worm, nodular worm, lungworm
41
What is Stephanurus dentatus?
kidney worm
42
How long is the adult kidney worm?
2-4 cm
43
How are adult kidney worms found?
in pairs in cysts in the kidney or surrounding fat
44
What is the life cycle of the kidney worm?
direct
45
How are kidney worms transmitted?
ingestion or skin penetration
46
Who is the transport host for kidney worms?
earthworm
47
What are the clinical signs for kidney worms?
decreased appetite, stunted pigs, emaciation, muscle stiffness
48
With kidney worms, you may see economical losses due to what?
poor feed efficiency and trimming of carcass at slaughter
49
What do kidney worm ova look like?
oval with internal spheres
50
Eggs laid by adult female kidney worms pass out in what?
urine
51
How long after infection do kidney worm ova pass out in urine?
6-9 months
52
What worms may not be detected unless fecal material in contaminated by urine?
kidney worm
53
What is Oesophagostomum spp.?
nodular worm
54
Where are adult nodular worms found?
large intestine
55
Where are nodular worm larva found?
small and large intestine
56
What do nodular worms appear as?
nodules on the mucosal surface
57
What is the life cycle of the nodular worm?
direct
58
What are the clinical signs of the nodular worm in pigs?
severe diarrhea, loss of appetite, emaciation, death
59
How are nodular worms detected?
fecal floatation or centrifugation
60
What do nodular worm ova look like?
oval containing spheres, fairly transparent
61
What is Metastrongylus spp.?
lungworm
62
Where do lungworms live?
in the bronchi and bronchioles of lung
63
Where are lungworm eggs laid?
in bronchi and are coughed up, swallowed, and passed in feces
64
What is the life cycle of the lungworm?
indirect
65
Who is the intermediate host for lungworms?
earthworm
66
What are the clinical signs of lungworm in pigs?
cough with loss of condition, stunted growth, lung irritation and inflammation, may predispose pigs to secondary bacterial infections
67
How do you detect lungworms?
fecal floatation or centrifugation
68
What do lungworm ova look like?
oval, rough outer shell wall, dense interior with larval development
69
What is the trichuris suis?
whipworm
70
Where do adult whipworms live?
cecum and large intestine
71
How long are whipworms?
5cm
72
What do whipworms do?
consume blood and damage
73
What is the life cycle of the whipworm?
direct
74
How long do whipworm eggs remain viable in the soil?
years
75
What are the clinical sign of the whipworms?
stunted pigs, bloody, watery diarrhea, occasional deaths

Parasitology (5 decks)

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