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10 Cards in this Set
- Front
- Back
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what is the common name for oxyurida?
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pinworm
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are Oxyurida host specific?
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yes
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describe, in general terms, Oxyurida morphology?
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long, tapering tail
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where is Oxyuris equi found?
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large intestine of horses
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what is the morphology of Oxyuris equi?
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whitish, thick-bodied. Adult males 9-12mm. Adult females 40-150mm. Vulva on anterior end. Eggs are single operculum
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what is the life cycle of Oxyuris equi?
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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
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what is the pathogenesis of Oxyuris equi?
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large number of adults/larve result in colitis. Perianal itching due to fluid/eggs > tailhead rubbed bare
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how do we diagnos Oxyuris equi?
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scotch-tape test on perianal region, look for eggs
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what is the prepatent period of Oxyuris equi?
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~5mo
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how do we treat Oxyuris equi?
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most anthelmentics effective (pyrantel, ivermectin), keep stall area clean to prevent environmental contamination with eggs (note: children get pinworms from other children)
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