Metastrongyles Flashcards
Metastrongyle life cycle
indirect
Is Dictocaulus vivparus a lung worm?
Not a metastrongyle
How to diagnose metastrongyles?
L1 larvae in Baerman’s test
Metastrongylus in pigs how to diagnose?
fecal flotation of the L1s not baerman test
Intermediate host of metastrongylus
earthworms
L1 ingested then hatch and mature to L3
Distribution of Metastrongylus spp.
Most common in midwest and southeast but has decreased mostly in pigs on pasture
Metastrongylus spp. migration
L3 released in SI-> liover -> lung
Metastrongylus pathogenesis
pneumonia and secondary infections
Metastrongylus diagnosis
fecal float
Muellerius Intermediate host
snails and slugs
Muellerius diagnosis
finding 1st stage larva in baerman test
Parelaphostrongylus tenius definitive host
white tailed deer
Parelaphostrongylus tenius intermediate hosts
snails and slugs
Parelaphostrongylus tenius accidental hosts
camels, sheep, goats, llamas, horses, wild ruminants
Parelaphostrongylus tenius distribution
East of the great plains from gulf of mexico to couthern canadian provinces
Parelaphostrongylus tenius life cycle
adults are in meninges of brain
eggs are produced and go into venous circulation where they go to the heart and then the lung where they hatch and are coughed and swallowed then L1 are passed in feces and snail or slug gets infected and they mature to L3
Parelaphostrongylus tenius PPP
3 months
Parelaphostrongylus tenius signs in abnormal hosts
rear leg weakness, ataxia, blindness, circling, incoordination
Parelaphostrongylus tenius diagnosis
no larva in feces of abnormal hosts
mostly ofund in necropsy and hisotpathology in abnormal hosts
L1 in feces of white tailed deer
Signs in deer of Parelaphostrongylus tenius
very well adapted and don’t show neuro signs
