Parasites Flashcards
Culicoides
tx?
equine
SWEET ITCH
SEASONAL, warm weather
dorsum, poll, mane, tail
tx: control flies, stable horses
habronema muscae
equine SUMMER SORES stomach worm, granulomatous, cutaneous ulcerative lesions, potentially mass-like necrotic lesions in stomach - L3 migrate to moist areas/wounds - eye, male genitalia (rare- aberrant migration)
tx: topical ivermectin, steroids +/- sx
Haematobia
CATTLE > equine
VENTRAL midline dermatitis, round crusty lesions (CAUSED by STENOFILARIA [IH])
cattle - found near horns, back, sides esp COLD DAYS
Hypoderma
CATTLE > equine
nodules with pore on DORSAL
CS: eggs in limbs in summer, by winter = SC cysts
tx: cattle in EARLY FALL (pour on moxidectin)
Strongylus vulgaris
thrombosis and infarction of mesenteric artery, also verminous arteritits
strongyloides westeri
foal heat diarrhea
lung damage
psoroptes
mange, pruritis of ear
reportable
Chorioptes
SCRATCHES/GREASY HEEL/ derm verucosa?
Mange, intense PRURITIS DISTAL LIMB and ventral abdomen (also papule, erythema, scaling, crusts, alopecia)
Chorioptes BOVIS is REPORTABLE
- Same CS
Thelazia lacrylmalis
vector = musca autumnalis (face fly)
Gasterophilus intestinalis
bot fly (larva) (Stomach Bot) NO CLINICAL SIGNS
dictocaulus arnfieldi
vs. dicyocaulus viviparous
equine lungworm
OLDER HORSES
75% of donkeys are affected and DONT SHOW CLINICAL SIGNS
tx: ivermectin q8weeks
cattle lungworm
YEARLING COWS on PASTURE in summer and fall aka HUSK
- L3 infective -> lung via lymphatics in 7 days
tx: ivermectin 3,8, 13 weeks after starting on pasture
draschia megastoma
equine
focal granulomas in lung
parascaris equorum
verminous pneumonia
intestinal impaction
colic in FOALS
Cyathostomes
=small strongyles
CS: colic, ventral edema, diarrhea
(only really bad when theres heavy infestation and larva leave gut wall en mass in late winter/spring)
dx: bright red larva in feces
equine Tapeworms
intussusception and colic
not diarrhea
trichophyton equinum
dermatophyte/ringworm
CS: urticaria, alopecia, scaling, crusting
dx: culture
tx: topical antifungal, disinfect tack
ostertagia ostertagii
cattle
cobblestone abomasum/moroccan leather
petechia in abomasum, acute watery diarrhea
oxyus equi
equine pinworm
eggs in perineum
CS: discomfort and pruritis
dx: scotch tape
demodectic mange
horses can get but its RARE head, neck, withers NOT PRURITIC, dx: scrape tx: none good, amitraz causes colic/death in horses
Tapeworms in cattle
Moniezia, square eggs!
stephanofilaria stilesi
cattle cutaneous stephanofilariasis (W and SW America) VENTRAL Midline dermatitis IH = horn fly (haematobia irritans)
All the lung worms?
D. viviparus - cattle
D. arnfieldi - donkeys non clinical, horses clinical
D. eckerti - deer
D. filaria, protostrongylus, Muellerius cappillaris - sheep and goats
Aulerostrongylus abstrusus and eucoleus aerophlus - cats
oslerus osleri - dogs
metastrongylus apri - pigs
ollulanus tricuspis
stomach worm of cats.
vomiting minutes-hrs after eating, due to mild erosive gastritis
Cyathostomes
SMALL strongyles
eggs not seen on fecal but BRIGHT RED L4/L5 easily seen in feces
larva in GI wall may undergo hypobiosis and remain dormant. then leave en-masse in WINTER/SPRING -> suddent weight loss, colic, diarrhea in YOUNG HORSES
tx: avermectins, but hypobiotic may be more difficult