PART 7

Question 1

insect hypersensitivty other term

causative agent
- this one prefers what side

this flies prefer VENTRAL part of abdomen

Answer 1

Mosquitoes
Prefer lateral side of bodies
Prefer stagnant water

Biting midges (Culicoides)

Queen’s land itch
Summer itch
Sweet Itch

Blackflies (Simulium)
Prefer flowing water
Horseflies (Tabanidae)
Horn flies (Haematobia irritans)
Prefer ventral part of abdomen
Breed specifically in freshly laden cattle feces
Stable flies (Stomoxys)*
Houseflies*
*Decaying matter or vegetation
Bees
Wasps

Question 2

is insect hypersensity seasonal? y/n

Answer 2

y

Question 3

breeding areas
Mosquitoes and biting midges :
Black flies:
Horn Flies:
Stable and house flies:

Answer 3

Mosquitoes and biting midges : stagnant water
Black flies: flowing water
Horn Flies: breed in fresh cattle feces
Stable and house flies: decaying vegetation, matter

Question 4

all insects mentioned are active during the day t/f

Answer 4

f - mosq and biting midges NOT ACTIVE during day

Question 5

tx of insect hypersens

Answer 5

Corticosteroids
If antihistamine is ineffective
Hydroxyzine hydrochloride
Allergies, urticaria in horses
Antihistamine
Permethrin and pyriproxyfen
Pyrethrins and pyrethroids

Question 6

aside from parasites, these meds have been associated with pruritic diseases

Answer 6

cutaneous drug interaxn

Question 7

what are the drugs involved in cutaneous drug interaxn

Answer 7

Penicillin
Streptomycin
Oxytetracycline
Neomycin
Chloramphenicol
Sulfonamides
Phenothiazines
Phenylbutazone
Guaifenesin
Aspirin
Glucocorticoids

Question 8

Diagnosis
Some would recommend _______allergic reaction by administering these drugs

High risk due to induced _____
Withdraw the drug and observe if CS goes away

Answer 8

inducing
anaphylaxis

Question 9

Also known as rain scald

causative agent

Answer 9

DERMATOPHILOSIS
Dermatophilus congolensis

Question 10

rain scald prereqs for multiplication

Answer 10

Moisture = rain scald
Trauma to skin

Question 11

main tx for rain scald

Answer 11

wound managenemnt

Lime sulfur**
Benzyl peroxide*
Chlorhexidine*
Available in *shampoo preparation and **dips

Question 12

most common contagious disease in horses
Easily transferred from one to another
Known as ringworm

Answer 12

dermatophytosis

Question 13

most common isolates of ringworm

Answer 13

Trichophyton equinum
T. mentagrophytes
Microscoporum gypseum
M. canis

Question 14

ringworm is ____ and _____

Answer 14

selflimiting and zoonotic

Question 15

lesions of ringworm

sample is collected at the ___ of hair

Answer 15

Scaling
Circular areas

periphery of lesions

Question 16

DIAGNOSIC test for ringworm but NOT practical in horses

Answer 16

woods lamp

Question 17

tx of ringworm

Answer 17

Miconazole
w/ chlorhexidine
As shampoo
Same with dogs

Lime sulfur
Dilute beach soln
1:10 dilution in water
Less expensive option
With characteristic odor
Systemic antifungals
Generally more expensive than topical tx

Question 18

systemic drugs used in ringrowm tx

Answer 18

Griseofulvin*
Itraconazole*
Sodium iodide*
*Systemic drugs
May induce abortion

Question 19

Begin as traumatic injuries from which an Infectious organism will be Inoculated in the dermis

bacterial granulomata

causative agen

Answer 19

Botryomycosis

Botryo: grapes; Grape-like nodules

staph aureus

Question 20

botryo test

Answer 20

fungal/bacterial culture

Question 21

Aka pigeon fever
Spread by Horn flies (Haematobia irritans)

causative agent

Answer 21

Corynebacterial infections

Corynebacterium pseudotuberculosis

Question 22

coryne:
Breast muscles
Pigeon fever
Breast looks like a pigeon
Inflammation and abscesses
Drain purulent material - whitish/greenish in color
Sample for culture
During summer or fall

Answer 22

abscesses

Question 23

coryne:
Inflammation of lymph vessels
Along lymph vessels, there are nodules → ulcers
Problem: disfiguration of animal especially in limbs
More on fetlocks
Performance gravely affected

Answer 23

ulcerative lymphangitis

Question 24

coryne tx

Answer 24

procaine penicillin (large doses( + wound mgt

surgical draianage
- Wait for abscess to mature
Hasten maturation of abscess by applying warm compress → surgically incise abscess

Question 25

dx for xoryne

Answer 25

Lesions
Gram stain
Bacterial culture