Unit 1: Ectoparasites in Dogs & Cats Flashcards
What organisms cause Cheyletiellosis?
Cheyletiella yasguri, blakeii, parasitovorax
Where does the life cycle of Cheyletiella take place?
On the surface of the animal; eggs are attached to hairs
T/F: Cheyletiella is zoonotic
True
What organism is this and how do you know?
Cheyletiella mite;
Has 4 pairs of legs and characteristic mouthparts with hooks used for grasping and holding onto hairs
What are clinical features of Cheyletiellosis?
Variable levels of pruritus;
Scaling, erythema progressing to crusts, excoriations;
Scales often found over the base of the tail in puppies;
Multiple animals often involved
What other species of animal gets Cheyletiella?
Rabbits
How is Cheyletiellosis diagnosed?
Direct observation with magnifying lens, tape prep, skin scrape, fecal float (bc animals lick themselves), flea comb
What are the treatments of choice for Cheyletiellosis?
Ivermectin, Selamectin (Revolution), and Advantage Multi
Topical acaricides for 3-4 treatments (lime sulfur, amitraz, carbamates)
In addition to drugs, what can be done to remedy Cheyletiellosis?
Disinfect the environment
What is Lynxacarus radovsky?
Feline fur mite that does not occur in the continental U.S.
What are synonyms for notoedric mange?
Feline scabies, head mange
What organism causes notoedric mange?
Notoedres cati
The life cycle of Notoedres cati is similar to _____.
Sarcoptes spp.
What is the significance of notoedric mange?
It is highly contagious and zoonotic
What are clinical signs/features of notoedric mange?
Intense pruritus around the head, ears and neck initially;
Clinical features = alopecia, scaling, erythema, crusts
What do Notoedres mites look like?
Have long, unjointed stalk on end of leg
What are treatments for notoedric mange?
Topical acaricides (lime sulfur and Bravecto for cats);
Systemic insecticides (ivermectin, revolution, advantage multi)
In addition to drugs, what can be used to remedy notoedric mange?
Treating all exposed cats and decontaminating the environment
What are synonyms for otoacariasis?
Ear mites, otodectic mange
What organism causes otodectic mange?
Otodectes cynotis
How long is the life cycle of Otodectes?
3 weeks
How is otodectic mange transmitted?
Direct contact
What does the pathogenesis of otodectic mange include?
Irritation and hypersensitivity reactions
What are the clinical features of otodectic mange?
Pruritus of one or both ears, head shaking, accumulation of dark/dry/granular exudate in the opening of the ear canal
