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Parasitology (TS) > parasit quiz 1 > Flashcards

parasit quiz 1 Flashcards

0
Q

what is the resistant, resting but infective stage of protozoan?

A

cyst

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1
Q

what is term for free living or infective stage of protoaoan?

A

trophozoites

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2
Q

what modes of locomotion of protozoans are by flexing and gliding?

A

undulating membrane and subpellicular microtubules

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3
Q

what are the 3 ways of asexual repro of protozoa?

A

binary fission
multiple fission or schizogony (nuclear division precedes cytokinesis)
budding

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4
Q

what are the 2 ways protozoa reproduce sexually?

A

conjugation

syngamy - forms zygote

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6
Q

what is a paratenic(transport) host?

A

non essential host, no development within body

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7
Q

what is a mechanical vector?

A

non essential host, passively carries infective stage

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8
Q

What is a biological vector?

A

usually arthropod, maybe intermediate host or mechanical vector

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9
Q

Life cycle where transmission of parasitic infection from one host to another without intermediate host

A

Direct life cycle

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10
Q

Life cycle where there is one or more essential intermediate hosts

A

indirect life cycle

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11
Q

Time period between ingestion and invasions of infective stages of a helminth in its definitive host until eggs or larvae are produced

A

pre-patent period

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12
Q

Period of the life span of adult parasite in host

A

patent period

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13
Q

How many types of protozoa are parasitic?

A

10,000

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14
Q

Are protozoa prokaryotes or eukaryotes?

A

eukaryotes (have organelles)

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15
Q

Free-living or infective stage of protozoan

A

trophozite

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16
Q

Resistant, resting but infective stage of protozoan

A

cyst

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17
Q

What is the morphology of T. foetus?

A

pyriform with 1 recurrent flagellum with undulating membrane

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18
Q

Where is T. foetus found in the bull?

A

preputial cavity

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19
Q

Does T. foetus have a cyst stage?

A

no, also direct life cycle by sexual contact

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20
Q

What are the clinical signs of T. foetus in cows?

A

early abortion

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21
Q

What is the prognosis for clearing a bull of T. foetus infection?

A

guarded, different state regulations

22
Q

What is the standard for molecular diagnosis of T. foetus?

A

culture and gel PCR assay

23
Q

What can be used to flush the preputial cavity in bulls with T. foetus?

A

Alcide

24
Q

What is the scientific name for bovine trichomoniasis?

A

Tritrichomonas foetus

25
Q

What is the vaccine Trichguard good for?

A

reduces severity of disease, does not prevent

26
Q

What is the species that causes “cankor” or “frounce” in young birds?

A

Trichomonas gallinae

27
Q

How is T. gallinae transmitted?

A

direct by bird to bird contact and cloacal drinking

28
Q

What drug can be used to treat T. gallinae in non food birds?

A

metronidazole

29
Q

Which trichomonad occurs in the mouth of the dog?

A

Trichomonas canistomae

30
Q

What are the clinical signs of T. canistomae

A

nonpathogenic, +/- vaginitis

31
Q

Which protozoan is DNA homologous with T. foetus but found in cats and humans?

A

Pentatritrichomonas

32
Q

Which protozoan is found in mouth of cats with FIV, FelV, or FIP?

A

Tetratrichomonas felistomae

33
Q

Which flagellate parasite causes black head disease in turkeys and range birds?

A

Histomonas meleagridis

34
Q

Why is H. meleagridis pleomorphic?

A

Amoeboid form - intestinal lumen, or singly in tissues (no flagella)
Transitional form - lumen

35
Q

What is the life cycle of H. meleagridis?

A

direct, unique
via eggs of cecal worm (H. gallinarum)
develop on ground to L3 stage
also, cloacal drinking

36
Q

What are the paretenic stages of H. meleagridis?

A

earthworms

37
Q

Where are lesions of H. meleagridis found in birds?

A

cecum and liver

38
Q

How is Histomonas meleagridis treated?

A

fenbendazole and metronidazole

seperate turkeys and chickens

39
Q

How many nuclei does Giardia trophozite have?

A

binucleate

40
Q

What stage of Giardia is responsible for transmission?

A

cyst

41
Q

What type of life cycle does Giardia have?

A

direct

42
Q

How does Giardia divide and how often?

A

longitudinal binary fission every 12 hours

43
Q

What are the clinical signs of Entamoeba histolytica?

A

abdominal pain, intermittent diarrhea, anorexia, malaise, waxes and wanes

44
Q

What kind of lesions are associated with Entamoeba histolytica?

A

flask shaped ulcers

45
Q

What reptiles does E. invadens infect?

A

snakes and carnivorous lizards

46
Q

In what organs can you find E. invadens?

A

intestines - liver, abcesses, severe

47
Q

What type of life cycle does E. invadens have?

A

direct

48
Q

Is balantidium zoonotic?

A

yes

49
Q

What is the life cycle of Balantidium coli?

A

fecal oral, infective stage in feces

50
Q

What are the clinical signs of Balantidium coli?

A

asymptomatic, water diarrhea, nausea, vomiting, colic

Parasitology (TS) (10 decks)

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