Parasitology exam 4 Flashcards
Oxyuris equi common name
horse pinworm
Oxyuris equi host
horse
do dogs and cat carry pinworm?
no, only rats and horses
Oxyuris equi intermediate host?
none
Oxyuris equi ova
single operculated, larvated, flattened on one side, in horse to help ID
Oxyuris equi sex
dioecious
Oxyuris equi reproduction
oviparious
Oxyuris equi direct or indirect life cycle
direct
Oxyuris equi life cycle
Ova deposited by anus with gelatinous substance, makes butt itchy, horse will rub
Oxyuris equi infective stage
L3
Oxyuris equi site of infestation
cecum, large intestines, rectum
Oxyuris equi pathogenesis
intestinal, extreme pruritus, rat tail (pathognomonic sign) from tail rubbing, secondary infection
Oxyuris equi diagnosis
rat tail, scotch tape prep, adults in feces
Oxyuris equi treatment
fenbendazole, ivermectin, moxidectin
Oxyuris equi patient file
Oxyuris equi
Oxyuris equi owner
horse pinworm
Physaloptera rara host
dogs and cats
Physaloptera rara intermediate host
dung beetle, cockroaches, crickets
Physaloptera rara paratenic hosts
frogs, snails, mice
Physaloptera rara geographic distribution
north and south america
Physaloptera rara reproduction
oviparous
Physaloptera rara sex
dioecious
Physaloptera rara direct or indirect life cycle
indirect
Physaloptera rara life cycle
egg in poop, intermediate host eat ova, hatches paratenic eats intermediate host, final host eats intermediate
Physaloptera rara site of infestation
stomach, anterior duodenum
Physaloptera rara pathogenesis(6)
ulcerations, hemorrhage, hematemesis, melena, blood in saliva, ptylism
Physaloptera rara diagnosis(3)
larvated ova in feces, adults in vomit, endoscopy
Physaloptera rara TX
Fenbendazole, Ivermectin, Pyrantel pamoate
Physaloptera rara pt file
Physaloptera rara
Physaloptera rara owner
stomach worm
Physaloptera rara stool
may be normal, may need to do fecal
Spirocerca lupi host
dogs and cats
Spirocerca lupi intermediate hosts
dung beetle
Spirocerca lupi paratenic host(4)
lizards, chickens, mice, rabbits
Spirocerca lupi geographic distribution
tropics, gulf coast
Spirocerca lupi life cycle
ingest dung beetle or paratenic host
Spirocerca lupi site of infestation
esophagus, anterior stomach
Spirocerca lupi pathogenesis(6)
nodules, obstruction, hemorrhage, dysphagia, hemoptysis, tumor
Spirocerca lupi dx (5)
ova in feces/vomit, radiograph, endoscopy of tumor, necropsy, ova heavy sedimentation technique
Spirocerca lupi tx
Disophenol, fenbendazole, doramectin, ivermectin
Spirocerca lupi reproduction
oviparous
Spirocerca lupi sex
dioecious
Spirocerca lupi direct or indirect life cycle
indirect
Spirocera lupi patient file
Spirocerca lupi
Spirocerca lupi owner
esophageal worm
Habronema spp host
equine
Habronema spp. intermediate host
horse/stable fly
Habronema spp. life cycle
eggs in feces, eggs hatch L1, fly larva eat L1, fly has L3
Habronema spp. route of infestation
ingest infected fly or fly lay L3 on lips, eyes, wound
Habronema spp site of infestation
adults: stomach, larva: wounds and wet skin
Habronema spp pathogenesis adults
granulomas, gastritis, usually non-pathogenic
Habronema spp pathogenesis larva
summer sores, Habronemiasis, dormant in winter, return in warm weather
Habronema spp DX
larvated ova in feces, clinical signs, biopsy
Habronema spp TX
intestinal: Moxidectin, Ivermectin, Cutanous:Ivermectin, Cryosurgery, surgical removal
Habronema spp pt file
Habronema spp
Habronema spp owner
roundworm
Habronema spp reproduction
oviparous
Habronema spp sex
dioecious
Habronemai spp direct or indirect life cycle
indirect
Draschia megastoma host
equine
Draschia megastoma intermediate host
horse/stable fly
Draschia megastoma life cycle
ova in feces, fly larva ingests L1, adult fly has L3
Draschia megastoma route of infestation
ingest fly, fly deposit larva by lips, eyes, wounds
Draschia megastoma site of infestation
stomach
Draschia megastoma pathogenesis adult
granuloma, gastritis, generally non-pathogenic
Draschia megastoma pathogenesis larva
ectopic larva, more damage than Habronema, summer sores, Habronemiasis
Draschia megastoma DX
larvated ova in feces, clinical signs
Draschia megastoma tx
adults:ivermectin, larva: ivermectin, cryosurgery, surgery removal
Draschia megastoma pt file
Draschia megastoma
Draschia megastoma owner
roundworm