Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
what is the common name for oxyurida?
|
pinworm
|
|
are Oxyurida host specific?
|
yes
|
|
describe, in general terms, Oxyurida morphology?
|
long, tapering tail
|
|
where is Oxyuris equi found?
|
large intestine of horses
|
|
what is the morphology of Oxyuris equi?
|
whitish, thick-bodied. Adult males 9-12mm. Adult females 40-150mm. Vulva on anterior end. Eggs are single operculum
|
|
what is the life cycle of Oxyuris equi?
|
adult females in small intestine > migrate to anus and deposit fluid/eggs on perianal area > eggs mature to contain L3 (4-5d) > fluid flakes off to environment > horse ingests L3-containing eggs from environment > eggs hatch in small intesting to release L3 > L3 enters mucosal crypts of large intesting > L4 develops in large intestine, emerge into large intestine lumen to feed > develop into adults
|
|
what is the pathogenesis of Oxyuris equi?
|
large number of adults/larve result in colitis. Perianal itching due to fluid/eggs > tailhead rubbed bare
|
|
how do we diagnos Oxyuris equi?
|
scotch-tape test on perianal region, look for eggs
|
|
what is the prepatent period of Oxyuris equi?
|
~5mo
|
|
how do we treat Oxyuris equi?
|
most anthelmentics effective (pyrantel, ivermectin), keep stall area clean to prevent environmental contamination with eggs (note: children get pinworms from other children)
|