Lecture: Scabies and other parasitic skin dz Flashcards
1
Q
canine scabies
A
sarcoptes
2
Q
Feline Scabies
A
Notoedres
3
Q
Canine Scabies
about
A
- parasitic, contagious disease
- one species, and many varieties
- zoonotic
4
Q
Sarcoptes
life cycle
A
- male mite lives on surface of skin
- fertilized femails burrow into stratum corneum
- eggs
- larvae (6 legs)
- Nymphs (6 legs)
- Adult (8 legs)
- life cycle: 3 weeks
5
Q
Sarcoptes transmission
A
- direct contact
- not part of normal flora
- not resilient in environment
6
Q
sarcoptes pathogenesis
A
- hypersensitivity
- mechanic irritation
- pruritogenic substances from saliva and feces
7
Q
Sarcoptes CS
A
- intense pruritis
- predilection for
- ventral abdomen
- pinnae (margins)
- Hocks
- Elbows
- Primary lesions: papule
- Excoriations, crusts, alopecia
- Secondary infections
8
Q
Clinical features chronic sarcoptes infestation (scabies)
A
- hyperpigmentation
- lymphadenopathy
- weight loss
- hyperglobulinemia
9
Q
Norwegian scabies
A
- immunosuppressed animals
- glucocorticoids
- puppies
- rare form
- thick crusts
- numerous mites
- little pruritis
10
Q
Scabies incognito
A
- well groomed animals
- Intense pruritus
- No lesions
11
Q
Scabies dx
A
- clinical diagnosis
- intense pruritis
- papular eruption
- typical distribution of lesions
- superficial skin scraping
- positive < 50% of the time
- margins of pinnae, elbows, hocks
- response to treatment
- if you suspect it, treat it
12
Q
scabies
TX
A
- Topical
- lime sulfur dip (for itching)
- selamectin (revolution)
- Fipronil (frontline)
- Systemic
- Ivermectin
- Milbemycin
13
Q
Scabies
General considerations
A
- treat all animals with contact
- length of treatment (duration of cycle plus so more than 3 weeks)
- treat secondary infections
- pruritus may get worse before better
- product resistance
- clean environment
14
Q
LymDip
A
- Faster relief
- strong antipruritic
- yellow staining
- sulfur smell
- drying
15
Q
Selamectin
A
- label
- suggested regimen 1 dose/2 weeks for 3 times
- won’t kill demodex
