Mange Mites

Question 1

What do Mange mites cause?

Answer 1

Mange/Scabies

Question 2

Class and Subclass

Answer 2

Class: Arachnida
Subclass: Acari (mites)

Question 3

General morph of mange mites

Answer 3

Have 4 pairs of legs (closely related to spiders)

Have: palps, chelators, hypostome, anal plate, spiracles in various places

Question 4

What type of mites cause Mange?

Answer 4

Astigmatid

Question 5

What are the 3 types of astigmatid mites

Answer 5

Sarcoptidae
Knemidokoptidae
Psoroptidae

These are permanent ectoparasites
Can cause allergic reactions
Life cycle: Egg– Larva– 1st nymph stage, 2nd nymph stage— adult

Question 6

Sarcoptes/ Sarcoptidae

Answer 6

Have short legs- tarsus, praetarsus and ambulacrum which is tunnel-shaped
Are oviparous
Females burrow the skin- may be able to see the burrowing trail
Affect mammals
Boil in alkaline so that the chitinous part remains

Question 7

Knemidokoptidae

Answer 7

Short legs- v. short praetarsus, ambulacrum that is shaped like a suction cup
Viviparous
Burrow skin
Affect birds

Question 8

Psoroptidae

Answer 8

Long legs, segmeted praetarsus
but.. 4th pair of legs are short 
Oviparous 
Supf on skin- pierce skin at base of hairs and suck lymph/exudate 
NON-burrowing

Question 9

Mange of the Horse

Answer 9

Sarcoptes scabei var equi– short haired body surface
Psoroptes cuniculi- external ear canal
Psoroptes ovis- densely packed hair e.g chest
Chorioptes bovis- on lower parts of legs

Question 10

Mange of cattle

Answer 10

Sarcoptes scabei var bovis- short hair– head
Psoroptes ovis– densely haired skin
Chorioptes bovis– lower parts of legs/gluteal region

Question 11

Mange of sheep and goats

Answer 11

Sarcoptes scabiei var ovis- short-haired
Sarcoptes scabiei var caprae- short hair
Psoroptes ovis– wooly parts– NOTIFIABLE
Psoroptes cuniculi- goats ears
Chorioptes bovis– lower parts of legs

Question 12

Mange of pig

Answer 12

Sarcoptes scabiei var suis– EARS
Acute
Chronic: thickening of skin, hyper/parakeratosis, older sows and boars

ZOONOTIC

Question 13

Mange of dogs

Answer 13

Sarcoptes scabei var canis– shirt hair on ears, ankles etc…
Otodectes cynotis- ext ear canal- otitis externa
Notoedris cati- face mange

Question 14

Mange of the cat

Answer 14

Notoedres cati- face mange- serious symptoms that could lead to death

• • has fingerprint like structure on its back
• • may be able to see the egg inside females

Otodectes cynotis- ext ear canal- otitis externa

Question 15

Mange of rabbits

Answer 15

Psoroptes cuniculi– hyperkeratosis of ext ear canal

• -non-burrowing
• -long legs
• • don’t try to remove, it’s very painful

Notoedris cati- face mange

Question 16

Mange of birds

Answer 16

Knemidokoptes gallinae
Knemidokoptes pilae
Knemidokoptes mutans

Burrowing 
Vivparous (dont lay eggs, just give birth)

Question 17

Knemidokoptes gallinae

Answer 17

Chickens, pheasants and geese
Depluming mite
Feather loss

Question 18

Knemidokoptes mutans

Answer 18

Crusts on naked surface of legs

Question 19

Knemidokoptes pilae

Answer 19

Papillomatous thickenings of keratin on the face

• -v. short legs
• -circular body
• • no pedicels on females

Question 20

Non-burrowing mites on birds= feather mites

Answer 20

Ptiloxenoides spp

Have an elongated body