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Flashcards in sarcocystis neurona Deck (21)
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1
Q

common name

A

equine protozoal

2
Q

intermediate host

A

cats, skunks, armadillos, sea otters, raccoons

3
Q

definitive host

A

opossum

4
Q

accidental host

A

horse

5
Q

sporulated oocyst with ___ sporocysts each with ____sporozoites

A

2,4

6
Q

life cycle includes ___ in definitive host

A

gametogony

7
Q

_____occurs in intermediate host

A

schizogony

8
Q

how does final host get infected?

A

ingestion of bradyzoite cysts in muscles of intermediate host

9
Q

life cycle

A

bradyzoites are liberated
zoites differentiate into micro and macrogametocytes
fusion of gametes
oocysts are produced

10
Q

what happens in intermediate host

A

ingest sporocyst
sporozoites released invade intestinal wall
undergo 2 schizogonous cycles
third asexual cycle results in merozoites
merozoites enter muscle cells- bud
gives rise to bradyzoites with cyst

11
Q

what is the infective stage for final host?

A

bradyzoite with cyst

12
Q

site of infection

A

final host: intestines

intermediate host: muscles

13
Q

pathogenesis

A

final host: non pathogenic
accidental host: when nervous tissue is infected
intermediate host: due to 2nd stage schizogony in vascular endothelium

14
Q

clinical signs

A

neurological disease, stumbling, paresis

lameness, ataxia, laying down, muscle atrophy

15
Q

diangosis

A

histopathological demonstration of EPM- postmortem

western blot test- antemortem

16
Q

treatment and prevention

A

opossum control
antiprotazoals
hygiene is most important

17
Q

what does EPM stand for - common disease

A

Equine protozoal myeloencephalitis

18
Q

PPP

A

7-14 days

19
Q

____ is the most common diagnosed infectious neurologic disease in america

A

EPM

20
Q

this parasite can cause a disease associated with ______

A

the brain, brainstem, and spinal cord

21
Q

EPM treatment leads to successful recovery in _____ % of horses

A

75