VetPath Articles Flashcards
Spirocerca lupi, histologic features of parasite
Spiruid nematode – prominent lateral cords, intestine lined by uninucleate cells with brush border, eosinophilic material in pseudocoelom
Spirocerca lupi, histologic lesions
Necrotizing arteritis (aorta adventitia), granulomatous esophagitis/esophageal fibrosis; Intestinal infarcts d/t aberrant migration of larvae (vetpath 2020)
Spirocerca lupi, sequelae
Can undergo malignant transformation to sarcoma +/- hypertrophic osteopathy, Esophageal Fibrosarcoma/osteosarcoma, hypertrophic osteopathy, spondylosis derformans of thoracic vertebrae d/t larval migrans
Spirocerca lupi, host, location of lesion in host, intermediate host
Esophageal/gastric cardia/aortic wall canids/wild felids, Intermediate host: dung beetle, insectivorous paratenic host
Sarcocystis gigantea
Sheep, white nodules on esophageal serosa, Can be associated with eosinophilic myositis, Spread by cats
Thalazia
Halicephalobus gingivalis
Dirofilaria immitis
Filarid nematode, Differentiate from non-pathogenic dipetalonema reconditum, Dogs>cats,
Prosthenoichis elegans
Acanthocephalon, No digestive tract, hypodermis»_space;muscle, lacunar channels, spiny proboscis and lemnisci, Double shelled egg
Prosthenoichis elegans
Ulcerative and pyogranulomatous typhlocolitis in primates, intermediate host – cockroach and beetles, Secondary infections often lead to debilitation and death
Prosthenoichis spirula
less common and in ileum
Macracanthorhynchus hirudinaceus
- Thorny headed worm of swine
- Wild and domestic swine, dung beetle intermediate host
- Small intestines
Oesophagostomum
Nematode
Small adults embedded within nodule in cecum, colon, mesentery
Wild caught monkeys
Oxyuris equi
horse pinworm
SKrjabinema ovis
goat/sheep pinworm
Ostertagia ostertagi (cattle)
trichostrongyle, Morrocan leather= mucus neck cell hyperplasia/metaplasia
* Type I – lambs and calves = direct development of ingested larvae to adult in short time = chronic gastritis
* Type II – hypobiosis => synchronous maturation-> acute abomasitis
Type I Ostertagia
lambs and calves = direct development of ingested larvae to adult in short time = chronic gastritis
Type II Ostertagia
hypobiosis => synchronous maturation-> acute abomasitis
Teladorsagia circumcincta (sheep and goats)
- trichostrongyle
- Morrocan leather= mucus neck cell hyperplasia/metaplasia
- Type I – lambs and calves = direct development of ingested larvae to adult in short time = chronic gastritis
- Type II – hypobiosis => synchronous maturation-> acute abomasitis
Haemonchus contortus
Trichostrongylus axei
- Horses
*. Similar to ostertagia - Trichostrongyle
- intraepithelial tunnels
Ollulanus tricuspis
Gastric trichostrongyle in cats
Nochti nochti
Gastric Trichostrongyle of NHPs (rhesus, cynomolgus, stumptail macaques)
Mucous neck cell hyperplasia, metaplasia of fundic/pyloric glands
Hyostrongylus rubidus
Trichostrongyle pigs
Thin sow syndrome
Gongylonema
- Spiruid nematode
- Tracts within mucosa without nodules in esophageal stratified squamous epithelium +/- stomach, rumne, tongue
- Ruminants, pigs, horses, primates, rodents
- Red, serptentine nematode 10-15cm
- Cockroach and dung beetle are intermediate hosts
Gasterophilus
- Horses/equids
- Migrate down esophagus/stomach
Hypoderma lineatum
- Affects ruminants
- Migrate down back
Sarcocystis gigantea
- Sheep
- White cystic nodules on esophageal serosa-> esophageal myositis
- Cats spread
Opisthorchis/Clonorchis sinensis
- Liver fluke
- Cholangiocarcinoma cats/humans
Draschia megastoma/Habronema megastoma
- Spiruid worm, equids
- Summer sore (skin), conjunctiva, intestines
- Fly intermediate host
- Brood pouches in glandular submucosa
- Granulomatous conjuncticitis with mineralization
- Grnaulomatous and eosinophilic dermatiits
Physaloptera (cats and dogs)
- Spiruid nematode in dogs and cats
- In lumen or adhered to gastric mucosa=> ulcerative gastritis
Physaloptera tumefaciens
- Large nematodes in macaques
- Attached by head to gastric mucosa, body hanging out into lumen
- Gastirits nad gatric hyperplasia
- Cockroach intermediate host
Tetrameres (T. americana «_space;T. fissipina)
Spiruid nematode
Aquatic birds, passerines, Galliformes
Proventricular glands (female, bright red), free in lumen or on mucosa (males
Crustaceoan, grasshopper, earthworm, cockroach intermediate host
Mucosal hyperplasia of proventriculus, inflammation (mild T. americana, significant T. fissipina)
Microtetrameres
Proventriculus of crows and pigeons
Cyrenea = nonpathogenic gallinaceous birds, quail
Gongolinema ingluvicola – crop, esophagus, proventriculus of chicken, turkey, partridge, pheasant, quail
Burrows in mucosa => white convoluted tracks
Protostrongylus refescens
Muellerius
Dicytocaulus filaria
Lungworm of sheep
Infarcted areas in lung
Taenia taeniaeformis
Cysticercus fasciolaris
Cestode
* Hepatic sarcoma in rat
Schistomsoma haematobium
- Urinary bladder TCC in humans
Trichosomoides crassicauda
- Papillomas on urothelium in rats
Heterakis isolonche
- Neurofibromatous mesenchymal neoplasia in pheasant
- Lymphoplasmacytic to Granulomatous typhlitis with fibroplastic/neoplastic proliferation
- Ascarid nematode, looks a lot like H. galinarum
- Sarcomatous/pseudoneoplastic proliferative spindle cells (whorls and bundles)
Heterobilharzia Americanum
- Linked lymphoma in a dog
Strongylus vulgaris
- Equids
- Thrombosis/vascular damage bowel perfusion, cranial mesenteric artery, intimal nodular mineralization of aorta, Vegetative valvular endocarditis (acute), caseous/calcareous endocardial nodules (chronic)
Cyathostomes
Small strongyles
Synchronous emergence can cause of hemorrhagic enteritis, hypoalbuminemia, weight loss
Typically nonpathogenic
Strongylus edentatus
Migrate through portal system to liver to cecum
Hemomelasm ilei, fibrin tags on hepatic capsule?
Strongylus equinus
Migrate through peritoneum to liver -> pancreas-> cecum/R ventral colon
Large strongyles
Horse – strongylus, tridontophorus, oesophagosdontus, craterostomum
Elephants – decrusia, equinurbia, choniangium
Macropod marsupials – macropicola, hypodontus
Ostriches – codiostomum
