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Flashcards in sarcocystis neurona Deck (21):
1

common name

equine protozoal

2

intermediate host

cats, skunks, armadillos, sea otters, raccoons

3

definitive host

opossum

4

accidental host

horse

5

sporulated oocyst with ___ sporocysts each with ____sporozoites

2,4

6

life cycle includes ___ in definitive host

gametogony

7

_____occurs in intermediate host

schizogony

8

how does final host get infected?

ingestion of bradyzoite cysts in muscles of intermediate host

9

life cycle

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

10

what happens in intermediate host

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

what is the infective stage for final host?

bradyzoite with cyst

12

site of infection

final host: intestines
intermediate host: muscles

13

pathogenesis

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

14

clinical signs

neurological disease, stumbling, paresis
lameness, ataxia, laying down, muscle atrophy

15

diangosis

histopathological demonstration of EPM- postmortem
western blot test- antemortem

16

treatment and prevention

opossum control
antiprotazoals
hygiene is most important

17

what does EPM stand for - common disease

Equine protozoal myeloencephalitis

18

PPP

7-14 days

19

____ is the most common diagnosed infectious neurologic disease in america

EPM

20

this parasite can cause a disease associated with ______

the brain, brainstem, and spinal cord

21

EPM treatment leads to successful recovery in _____ % of horses

75