Mange mites of cats and dogs Flashcards Preview

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Flashcards in Mange mites of cats and dogs Deck (41)
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1

What burrowing mites can be found in cats and dogs?

Sarcoptes scabiei
Demodex spp
Notoedres spp

2

What non-burrowing mites can be found in cats and dogs?

Cheyletiella sap
Trombicula spp
Otodectes cynotis

3

How are Sarcoptes transmitted? Are they contagious?

Physical contact
Very contagious

4

Sarcoptes causes mange in which species?

Dogs, foxes pigs

5

Describe the morphology of Sarcoptes

Round, flat, round head
Very stumpy from tlegs
Dorsal surface has thumb print pattern - folds of cuticle
Covered in scales and spines

6

What does mange cause? Where is mange most severe?

Intense pruritic lesions
Hair loss
Crusting
Head - around ears and eyes

7

How is mange diagnosed?

Clinical signs - itching etc
Skin scrapings

8

Are Sarcoptes scabiei found in cats?

Rarely

9

What animals are reservoirs of Sarcoptic mange?

Hedgehogs

10

Describe the lifecycle of Sarcoptes scabiei

Females dig tunnels in keratinin and feed on fluid between cells
Each female has own tunnel - lays 3 eggs/day
Larvae hatch in tunnel in 4 days
Larvae leave tunnels and moult to nymphs and adults

11

How long does it take for Sarcoptes eggs to become adults?

14 days

12

What drugs can be used to control Sarcoptic mange? What should be treated?

Amitraz
Moxidectin
Imidacloprid
Treat all dogs, instruments and bedding

13

Why is Ivermectin not used fo Sarcoptic mange in dogs?

Contraindicated - CNS problems

14

What test can be done to identify mange?

Pinnal pedal reflex
Rub ear with thumb and fore finger
If got mange, leg makes scratching movement

15

Where is Notoedres sp usually found?

Head, face and ears of cats
Sometimes hedgheogs

16

How does Notoedres spp differ to Sarcoptes scabiei? (2 reasons)

Sarcoptes in dogs, Notoedres in cats
Sarcoptes has stumpy front legs, Notoedres longer
Sarcoptes has scales and spines, Notoedres has no scales or spines

17

Demodex spp are burrowing mites (follicle mites), what species are they found in?

Many - humans, dogs
Rarely cats

18

What species of demodex infects dogs? Is demodex commensal or non-commensal? What is the disease caused by sensitivity to demodex mange?

Demodex canis
Commensal
Demodicosis

19

How can demodex be transmitted from a bitch to puppies?

Mammary skin whilst suckling

20

What are the symptoms of demodex infection?

Scaling
Alopecia
Papules and pustules

21

What are the 2 different forms of demodicosis? Which dogs are they usually found in? What do they cause?

Localised form - young dogs, lesions spontaneously resolve
Generalised form - any age dog, severe disease caused by secondary bacterial infection. Thickened skin, pustules and crust

22

Where do demodex burrow into?

Hair follicles and sebaceous glands

23

How can demodex be diagnosed?

Deep skin scrapings

24

What is the ear mite? Are they burrowing or non burrowing?

Otodectes cynotis
Non-Burrowing

25

What species are Otodectes cynotis found in? What age are more susceptible?

Cats and dogs
Young animals

26

What do Otodectes cynotis feed on? Where are they found?

Debris near ear drum Located in deep ear, can spread to head and neck)

27

How long is the lifecycle of Otodectese cynotis? How are they transmitted?

3 weeks
Direct contact

28

What are the symptoms of Otodectes cynotis?

Intense itching
Head shaking
Brown waxy exudate (cats)

29

What can be a complication of Otodectes cynotis?

Purulent otitis externa

30

What drugs can be used to control Otodectes cynotis

Permethrin (not its)
Imidacloprid
Selamectin