1. “It is only possible to live happily ever after on a
Live each moment!
“It is only possible to live happily ever after on a
day-to-day basis.”
-Margaret Bonnano

2. Ectoparasites

3. CASE #1

4. Ear Mites: Otodectes cynotis

5. Ear Mites ***
Otodectes cynotis – live on skin surface in external ear canals
Clinical Signs: Brown-black, crusty exudate
Very pruritic, may have excoriations around ears

6. Ear Mites *** Diagnosis: Treatment:
Combine exudate w/mineral oil on a slide, observe under microscope
Sometimes otoscopic exam will reveal moving debris & mites
Treatment:
Clean ears prior to topical medications
Topical ear medications
Ivermectin, milbemycin, others…
Selamectin applied transdermally

7. EAR MITES
Revolution (selamectin)
Otomite Plus
Milbemite (Milbemycin)

8. Ear Mites *** Client info:
Life cycle is 3 weeks -treat for full 30 days
Highly contagious, treat all animals in house
No human infection

9. CASE #2

10. Flea allergy dermatitis
Common presentation of flea allergy dermatitis in the dog -
Alopecia of the rump, base of tail, caudal thighs

11. Miliary Dermatitis
Common presentation of flea allergy dermatitis in cats

12. Fleas
Ctenocephalides felis – The cat flea is the most commonly isolated flea from dogs and cats
Flea saliva highly antigenic=> flea bite allergic dermatitis
Clinical Signs
Scratching/biting skin
Alopecia
Dog – affects base of tail and caudal thighs initially, then generalizes
Cat- miliary dermatitis
Diagnosis: Visualize fleas or flea dirt

13. Flea Life Cycle ***
Adult female produces avg. of eggs/day (up to 50)
Egg production only after blood meal
Incubation period: days
Larval stage thrives best in humidity
After 2 molts, larvae pupates (spins a cocoon)
Pupal stage
Most resistant
Lasts days to months dependent on environmental factors

14. Flea Life Cycle

15. Fleas Systemic (spot-ons, injectable, tablets)
Advantage (imidacloprid)- once a month spot-on; causes CNS paralysis and death of the flea
Sentinel: (Lufenuron)-oral in dogs; injectable in cats);
Interferes with production of chitin (hard shell)
Frontline (fipronil) - once a month spot-on; causes CNS paralysis or death
Revolution (Selamectin) – once a month spot-on; causes CNS paralysis and death; effective for heartworms, sarcoptes, ear mites, intestinal parasites in dogs and cats
Comfortis/Trifexis (spinosad) - once a month ORAL tablet; causes CNS paralysis and death
Bravecto (fluralaner) – 3 month oral tablet; CNS paralysis and death
Capstar (nitenpyram) – daily oral tablet: CNS paralysis and death

16. Fleas *** Client Info Treat environment and animal
Fleas spend most of time off host
All animals must be treated
Skin damage/dermatitis can occur