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Parasitology > Equine Protozoa > Flashcards

Equine Protozoa Flashcards

1
Q

Eimeria leukarti-Hosts

A

Equine

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2
Q

Eimeria leukarti-Identification

A

Oval oocyst large, 80 x 60 um, thick dark shell and distinct micropyle

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3
Q

Eimeria leukarti-Life Cycle

A

Sporulation; infection and schizogony; gametogony and oocyst formation
Sporulated oocyst infective stage

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4
Q

Eimeria leukarti-Site of Infection

A

Small Intestine

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5
Q

Eimeria leukarti-Pathogenesis and Lesions

A

Inflammatory changes in mucosa

Disruption of villous architecture

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6
Q

Eimeria leukarti-Clinical Signs

A

Largely benign.

Foals may get intermittent diarrhea

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7
Q

Eimeria leukarti-Diagnosis

A

Microscopic exam of feces for oocysts (sugar flotation)

Difficult to diagnose

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8
Q

Eimeria leukarti-Treatment and Prevention

A

Little known, antiprotozoal remedies should be tried

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9
Q

Sarcocystis neurona-Common Name

A

Equine protozoal myeloencephalitis (EPM)

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10
Q

Sarcocystis neurona-Hosts

A

Accidental host: equines
DH: opossum
IH: cats, striped skunks, nine banded armadillos, fishers, sea otters, raccoons

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11
Q

Sarcocystis neurona-Identification

A

Sporulated oocysts with 2 sporocysts each with 4 sporozoites, 18 um size

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12
Q

Sarcocystis neurona-Life Cycle

A

Gametogony in DH and schizogony in IH

Infected by ingesting bradyzoite cysts in muscles of IH

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13
Q

Sarcocystis neurona-Site of Infection

A

DH: intestines
IH: bradyzoites in muscles
Horses accidentally ingest sporocysts causing schizonts to develop within neurons and other cells

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14
Q

Sarcocystis neurona-Pathogenesis and Lesions

A

DH: non-pathogenic
IH: pathogenic effect is attributable to second stage schizogony in vascular endothelium
Horse: pathogenic effect when nervous tissue is infected

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15
Q

Sarcocystis neurona-Clinical Signs

A

Neurological disease, stumbling, paresis, lameness, ataxia, recumbency, constipation, urinary incontinence, muscle atrophy

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16
Q

Sarcocystis neurona-Diagnosis

A

Histopathological demonstration of EPM organisms in association with lesions in the CNS
Western blot on CSF

17
Q

Sarcocystis neurona-Treatment and Prevention

A

Opossum control

Antiprotozoal remedies

Parasitology (16 decks)

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