Acari 3 Flashcards
Psoroptes ovis
- common name
- hosts
- sheep scab mite
- sheep, cattle
Psoroptes ovis
-ID
- non-burrowing mite
- oval w/ pointed mouthparts for piercing and chewing
- causes “scab” mange
Psoroptes ovis
- LC
- Site of infestation
- mouthparts pierce and chew unique to these mites
- forms scab
- skin
Psoroptes ovis
-seasons
- reservoir sites during non-winter months
- rapid spread in winter
Psoroptes ovis
-pathogenesis/lesions/CS
- zone of inflammation w/ serous exudate
- dry crust covered center develops w/ moist borders
- mite activity leads to intense itching, restless rubbing, scratching, ragged wool
Psoroptes ovis
-dx
tx/ prevention
- season, CS, confirmation of mite in scrapping
- acaricidal tx, disinfecting enclosures, REPORTABLE dz
Otodectes cynotis
- common name
- hosts
- ear mite
- dogs, cats, ferrets, foxes, rabbits, humans
Otodectes cynotis
-ID
-long legs extend beyond body margin, suckers of males and females differ, copious dark cerumen is observed
Otodectes cynotis
- site of infestation
- pathogenesis/lesions/CS
- ears
- in cats, dry waxy parchment-like material in ears w/ large number of mites
- frequent skaking of head
Otodectes cynotis
- Dx
- Tx/prevention
- behavior of animal, exudate in ear canal, mites on slide
- several remedies
Cheyletiella yasguri
- hosts
- common name
- ID
- dogs, HUMANs
- “waist”, walking dandruff, palpal claws
Otodectes cynotis
- site of infestation:
- pathogenesis/lesions/CS
- Dx
- walking mites
- dandruff, adhesive tape or scotch tape swab
Demodex canis
- common name:
- hosts
- ID
- demodectic mange mite, follicle mite
- dogs
- “cigars w/ legs”
Demodex canis
-LC
-entirely in hair follicles and sebaceous glands. Transmission from bitch to newborns
Demodex canis
- Site of infestation
- Pathogenesis/lesions
- hair follicles and sebaceous glands
- localized demodicosis associated w/ alopecia, erythema and no pruritus. Usually in young animals. Prognosis for clinical recovery excellent
- hair loss
Generalized demodicosis
characterized by 5 or more areas of localized dz or entire body region, hair sparse & skin coarse and dry, develops to “red mange”. Concomitant staphylococcal pyoderma develops, pustules develop, open and ooze. Very difficult to cure
Demodex canis
- Dx
- Tx & prevention
- skin scrapings can reveal mites. However mites are NORMAL inhabitants so presence does not mean dz
- Amitraz, Bravecto-Fluralaner
Dermanyssus
- common name
- host
- ID
- red chicken mite, roost mite of birds
- domestic and wild fowl, human
- engorged females gray to red, needle-like mouthparts
Dermanyssus
-site of infestation
-night mite, at night, anywhere on skin, during the day hide in cracks
Dermanyssus
-pathogenesis/lesions/CS
- change of behavior due to itching
- weight loss
- reduced egg yield
- transmit dz
Dermanyssus
-LC
survive off of the host for months, life cycle can be completed in less than 7 days
-lay eggs off host
Dermanyssus
- Dx
- Tx& prevention
- ID, usually at night
- control proliferation of mites
- tx bird houses w/ appropriate and suitable parasiticides
Ornithonyssus
- Common name
- hosts
- Northern fowl mite (O. sylviarum)
- Tropical fowl mite (O. bursa)
- chickens, birds, HUMANs
Ornithonyssus
-ID
- most common poultry mite!
- engorged females most often seen
- grey to red color
- mouthparts long
