Flashcards in Mange mites of cats and dogs Deck (41)
What burrowing mites can be found in cats and dogs?
What non-burrowing mites can be found in cats and dogs?
How are Sarcoptes transmitted? Are they contagious?
Sarcoptes causes mange in which species?
Dogs, foxes pigs
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
What does mange cause? Where is mange most severe?
Intense pruritic lesions
Head - around ears and eyes
How is mange diagnosed?
Clinical signs - itching etc
Are Sarcoptes scabiei found in cats?
What animals are reservoirs of Sarcoptic mange?
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
How long does it take for Sarcoptes eggs to become adults?
What drugs can be used to control Sarcoptic mange? What should be treated?
Treat all dogs, instruments and bedding
Why is Ivermectin not used fo Sarcoptic mange in dogs?
Contraindicated - CNS problems
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
Where is Notoedres sp usually found?
Head, face and ears of cats
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
Demodex spp are burrowing mites (follicle mites), what species are they found in?
Many - humans, dogs
What species of demodex infects dogs? Is demodex commensal or non-commensal? What is the disease caused by sensitivity to demodex mange?
How can demodex be transmitted from a bitch to puppies?
Mammary skin whilst suckling
What are the symptoms of demodex infection?
Papules and pustules
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
Where do demodex burrow into?
Hair follicles and sebaceous glands
How can demodex be diagnosed?
Deep skin scrapings
What is the ear mite? Are they burrowing or non burrowing?
What species are Otodectes cynotis found in? What age are more susceptible?
Cats and dogs
What do Otodectes cynotis feed on? Where are they found?
Debris near ear drum Located in deep ear, can spread to head and neck)
How long is the lifecycle of Otodectese cynotis? How are they transmitted?
What are the symptoms of Otodectes cynotis?
Brown waxy exudate (cats)
What can be a complication of Otodectes cynotis?
Purulent otitis externa