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Parasitology > Canine/Feline- Sarcocystis, Hepatozoon, Babesia and Theileria > Flashcards

Canine/Feline- Sarcocystis, Hepatozoon, Babesia and Theileria Flashcards

1
Q

What is Sarcocystis spp. Hosts?

A

Final hosts: dogs, cats, humans, carnivores and birds.
Intermediate hosts: cattle, herbivores, omnivores, birds;
several species are zoonotic

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2
Q

What is Sarcocystis spp. Identification?

A

Sporulated oocysts with 2 sporocysts each with 4 sporozoites. Individual sporocysts often observed

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3
Q

What is Sarcocystis spp. Site(s) of infection?

A

Muscles in intermediate host. Sporocysts in gastro-intestinal tract of final host

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4
Q

What is Sarcocystis spp. Clinical signs?

A

No illness in final host. Fatal disease in
intermediate herbivore host.
Abortion may result

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5
Q

What is Sarcocystis spp. Diagnosis?

A

Sporocysts in final host. Bradyzoites in muscle tissue of intermediate host

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6
Q

What is Sarcocystis spp. Treatment and prevention?

A

Avoid raw meat and prevent fecal contamination

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7
Q

What is Hepatozoon spp. Hosts?

A

Dogs

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8
Q

What is Hepatozoon spp. Identification?

A

Gamonts in blood cells

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9
Q

What is Hepatozoon spp. Site(s) of infection?

A

Schizonts: in various tissues. Gamonts: circulating white blood cells

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10
Q

What is Hepatozoon spp. Clinical signs?

A

H. canis– subclinical infection.H. americanum– severe disease; joint pain, myositis

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11
Q

What is Hepatozoon spp. Diagnosis?

A

Parasites in peripheral blood. Examination

of muscle tissue at biopsy or necropsy

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12
Q

What is Hepatozoon spp. Treatment and prevention?

A

No satisfactory treatment

Tick control

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13
Q

What is Babesia spp. Hosts?

A

Dogs; sometimes humans

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14
Q

What is Babesia spp. Identification?

A

Trophozoites in red blood cells

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15
Q

What is Babesia spp. Site(s) of infection?

A

Erythrocytes

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16
Q

What is Babesia spp. Clinical signs?

A

Depression, anorexia, anemia, splenomegaly

17
Q

What is Babesia spp. Diagnosis?

A

Trophozoites in peripheral blood smear (Giemsa)

18
Q

What is Babesia spp. Treatment and prevention

A

Antiprotozoal therapy effective but not approved in USA. Tick control – Rhipicephalus sanguineus

19
Q

What is Theileria (Cytauxzoon) spp. Hosts?

A

Cats. Bobcats.

20
Q

What is Theileria (Cytauxzoon) spp. Identification?

A

Small organisms (merozoites) 1-2 μm in red blood cells

21
Q

What is Theileria (Cytauxzoon) spp. Site(s) of infection?

A

Blood

22
Q

What is Theileria (Cytauxzoon) spp. Pathogenesis/clinical signs?

A

Fever, anemia, icterus. Developing schizonts cause enlargement of infected cells. Occlusion of
blood vessels – heart, liver, lungs. Rapid and fatal disease, south central USA

23
Q

What is Theileria (Cytauxzoon) spp. Diagnosis?

A

Peripheral blood smear (Giemsa or Wright’s stain)

24
Q

What is Theileria (Cytauxzoon) spp. Treatment and prevention?

A

No satisfactory treatment.

Tick control

Parasitology (23 decks)

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