Parasites

Question 1

Culicoides

tx?

Answer 1

equine
SWEET ITCH
SEASONAL, warm weather
dorsum, poll, mane, tail

tx: control flies, stable horses

Question 2

habronema muscae

Answer 2

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

Question 3

Haematobia

Answer 3

CATTLE > equine
VENTRAL midline dermatitis, round crusty lesions (CAUSED by STENOFILARIA [IH])

cattle - found near horns, back, sides esp COLD DAYS

Question 4

Hypoderma

Answer 4

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)

Question 5

Strongylus vulgaris

Answer 5

thrombosis and infarction of mesenteric artery, also verminous arteritits

Question 6

strongyloides westeri

Answer 6

foal heat diarrhea

lung damage

Question 7

psoroptes

Answer 7

mange, pruritis of ear

reportable

Question 8

Chorioptes

Answer 8

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

Question 9

Thelazia lacrylmalis

Answer 9

vector = musca autumnalis (face fly)

Question 10

Gasterophilus intestinalis

Answer 10

bot fly (larva) (Stomach Bot)
NO CLINICAL SIGNS

Question 11

dictocaulus arnfieldi

vs. dicyocaulus viviparous

Answer 11

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

Question 12

draschia megastoma

Answer 12

equine

focal granulomas in lung

Question 13

parascaris equorum

Answer 13

verminous pneumonia
intestinal impaction
colic in FOALS

Question 14

Cyathostomes

Answer 14

=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

Question 15

equine Tapeworms

Answer 15

intussusception and colic

not diarrhea

Question 16

trichophyton equinum

Answer 16

dermatophyte/ringworm
CS: urticaria, alopecia, scaling, crusting
dx: culture
tx: topical antifungal, disinfect tack

Question 17

ostertagia ostertagii

Answer 17

cattle
cobblestone abomasum/moroccan leather
petechia in abomasum, acute watery diarrhea

Question 18

oxyus equi

Answer 18

equine pinworm
eggs in perineum
CS: discomfort and pruritis
dx: scotch tape

Question 19

demodectic mange

Answer 19

horses can get but its RARE
head, neck, withers
NOT PRURITIC, 
dx: scrape
tx: none good, amitraz causes colic/death in horses

Question 20

Tapeworms in cattle

Answer 20

Moniezia, square eggs!

Question 21

stephanofilaria stilesi

Answer 21

cattle
cutaneous stephanofilariasis
(W and SW America)
VENTRAL Midline dermatitis
IH = horn fly (haematobia irritans)

Question 22

All the lung worms?

Answer 22

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

Question 23

ollulanus tricuspis

Answer 23

stomach worm of cats.

vomiting minutes-hrs after eating, due to mild erosive gastritis

Question 24

Cyathostomes

Answer 24

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