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Parasit Exam 3 > Protozoa 3 > Flashcards

Protozoa 3 Flashcards

1
Q

Trypanosoma cruzi

  • hosts
  • ID
A
  • dogs, cats, humans. Reservoir hosts are many species, wild and domestic
  • elongated, trypomastigote in blood smear
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2
Q

Trypanosoma cruzi

  • site of infection
  • pathogenesis/lesions/CS
A

-muscle & blood
-acute & chronic cardiac dz
-chagas dz
puppiies and kittens most susceptible

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3
Q

Trypanosoma cruzi

-Dx

A
  • trypomastigote in blood smear

- Xenodiagnosis or serological tests confirming infected animal

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4
Q

Leishmania

  • common name
  • hosts
A
  • Kala-azar (visceral); oriental sore (cutaneous)

- reservoir hosts are many species, wild and domestic

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5
Q

Leishmania

-ID

A

amastgiotes, round or oval in host macrophages

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6
Q

Leishmania

-site of infection

A

-skin, liver, spleen, bone marrow & lymph node

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7
Q

Leishmania

-Dx

A

-tissue biopsy-amastigotes in macrophages; IFA; ELISA; PCR

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8
Q

Coccidiasis

A

infection with coccidian parasites

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9
Q

Coccidiosis

A

disease caused by a coccidian infection

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10
Q

Isospora canis

  • hosts
  • ID
A
  • final host are dogs, paratenic hosts include rodents

- largest

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11
Q

Isospora canis

  • site of infection
  • pathogenesis/lesions/CS
A
  • small intestine

- small intestinal cells destroyed, diarrhea can be severe, watery, profuse & bloody. YOUNG dogs susceptible

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12
Q

Isospora canis

  • Dx
  • Tx/prevention
A
  • oocyst

- management is critical

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13
Q

Isospora suis

  • host
  • pathogenesis/CS
A
  • pigs

- infects 1-2 week old piglets, high morbidity; low mortality

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14
Q

Eimeria spp

A
  • require one host
  • often restricted to a specific host species
  • most are gastrointestinal parasites of vertebrates
  • a given species may be limited to a narrow zone, specific kind of cells in a zone, even specific locations w/in cells
  • numerous number of Eimeria species
  • Merogony and gametogony w/in hosts, sporogony typically outside of hosts
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15
Q

Eimeria spp

-LC

A
  • PPP in days with three phases
    1. sporulation
    1. Asexual repro: infection and schizogony
    1. Sexual repro: gametogony and oocyst formation
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16
Q

Eimeria spp-Swine

  • host:
  • ID
A
  • pigs

- 8 Eimeria

17
Q

Eimeria spp-Swine

  • site of infection
  • pathogenesis/lesions/CS
A
  • small intestine
  • small intestinal cell are destroyed
  • enteritis, diarrhea
18
Q

Eimeria spp-Swine

  • Dx
  • Tx/prevention
A
  • oocysts
  • avoid overcrowding & poor sanitation
  • immunity develops
  • antiprotozoal remedies
19
Q

Eimeria spp-Cattle

  • hosts
  • ID
A
  • cattle
  • unsporulated oocyst in feces
  • sporulate for ID-12 species
20
Q

Eimeria spp-Cattle

  • site of infection
  • pathogenesis/lesions
A
  • small & large intestines
  • lesions in large intestine
  • inflammatory changes in mucosa
  • disruption of mucosa of large intestine
21
Q

Eimeria spp-Cattle

-CS

A
  • diarrhea
  • profuse, watery, projectile, bloody
  • severity related to parasite density and number of cells affected
22
Q

Eimeria spp-Cattle

  • Dx
  • Tx/prevention
A
  • fecal float for oocysts
  • coccidiasis is inevitable-immunity
  • coccidiosis is preventable- hygiene, coccidiostats
23
Q

Eimeria spp-Sheep/goat

  • host
  • ID
A
  • sheep & goats
  • 11 species in sheep
  • 9 species in goat
24
Q

Eimeria spp-Sheep/goat

  • Site of infection
  • pathogenesis/lesions
A

small & large intestine

  • inflammatory changes
  • disruption
25
Q

Eimeria spp-Sheep/goat

-CS

A
  • Diarrhea- putty like to watery to bloody
  • leads to dehydration and weakness
  • severity related to species, parasite density & number of cells affected
26
Q

Eimeria spp-Sheep/goat

-Outbreaks

A
  • lambs 1-3 month old
  • lot-fed animals
  • irrigated pastures
  • corralling
  • streee- transportation, temp changes
27
Q

Eimeria spp-Sheep/goat

-Dx

A

history, CS, fecal float to detect oocysts, sporulation for species

28
Q

Eimeria spp-Sheep/goat

-Tx/prevention

A
  • coccidiasis is inevitable
  • coccidiosis is preventable
  • anticoccidial therapy for clinical cases
  • supportive therapy
  • coccidiostats (feed-lots)
29
Q

Eimeria leukarti

  • host
  • ID
A
  • equids

- oval oocyst, thick dark shell and distinct micropyle, shell can come off

30
Q

Eimeria leukarti

  • Site of infection
  • pathogenesis/lesions
A
  • small intestine
  • inflammatory changes in mucosa
  • disruption of villous architecture
31
Q

Eimeria leukarti

  • CS
  • Dx
A
  • intermittent diarrhea
  • foal most susceptible
  • heavy oocysts difficult to float
  • sugar floatation or sediment
32
Q

Eimeria leukarti

-tx/prevention

A
  • antiprotozoals

- supportive therapy

Parasit Exam 3 (11 decks)

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