Aracnida

Question 1

Arachnida

Answer 1

Mites and ticks

Question 2

General characteristics

Answer 2

Simple eyes, if present
No wings
Presence of patella
Claws, suckers or setae
Larva 3 pair of legs
Adults+nymphs 4 pair or legs
Palms, hypostome, chelicerae

Question 3

Order Astigmata

Answer 3

Mange mites
genus:
Sarcoptes 
Psoroptes
Otodectes
Notodres
Knemidocoptes
Chorioptes

Question 4

Order Prostigmata

Answer 4

Mites
Genus:
Demodex 
Cheyletiella
Neotrombicula

Question 5

Order Mesostigmata

Answer 5

Mites
Genus:
Dermanyssus
Varroa

Question 6

Order Metastigmata

Answer 6

Ticks
Family Ixodidae
Family Argasidae

Question 7

Genus Sarcoptes

Answer 7

Sarcoptes scabei 
Host-adapted strains
Small
Smooth+striated cuticle, spines+setae
Chelicerae+maxipalps
Short limbs with suckers (sexual dimorphism), pedicles 
Burrows in epidermis
Nymphs and fert.females infective (direct or fomite)

Question 8

Genus Psoroptes

Answer 8

Non burrowing mite
Wool/fur+ ears
Longer legs w suckers on 3-jointed pretarsi
Males have copulatory suckers
Pointed capituli

Question 9

Genus Otodectes

Answer 9

Non burrowing mites
Ears
Suckers without jointed pretarsi

Question 10

Genus Knemidocoptes

Answer 10

Knemidocoptes-Birds, beak feathers and legs in parrots
Dermatophagoides-dust mite
Similar to Sarcoptes

Question 11

Genus Demodex

Answer 11

Long bodies- podosoma, striated opistosoma
In hair follicles and sebaceous glands
Very host-specific
Transmits Streptococcus pyogenes (acne)

Question 12

Genus Cheyletiella

Answer 12

“Walking dandruff” mites

Palpi claws

Question 13

Genus Neotrombicula

Answer 13

Only larva parasitic
Mainly summer+autumn
Round patches btw eyes (in dogs)

Question 14

Genus Dermanyssus

Answer 14

Chelicerae, elongated maxipalps
Erlanger developed legs
Idiosoma w shields
Heamatophagous 
Birds, domestic rodents
Nocturnal
Allergic reactions
Zoonotic

Question 15

Genus Varroa

Answer 15

Bees
Large in relation to host
Vectors of DWV

Question 16

Family Ixodidae

Answer 16

Respiratory stigma/spiracle after coax in last leg
Dorsally visible capituli
Hypostome w retrograde teeth
Differentiated by scutum and capituli length/shape
Permanent parasites
Egg-larva-nymph-adult
3 types of life-cycle
Vectors/spreaders of many diseases

Question 17

Genus Ixodes

Answer 17

Transmits Tularemia, Lyme disease, Erlichia

3 hosts life-cycle

Question 18

Genus Dermacentor

Answer 18

Ornamented
Transmits Babesia canis, Q-fever, Rocky Mountain spotted fever, Tlaremia
Generally 3 host life-cycle

Question 19

Genus Rhipicephalus

Answer 19

Transmission of Babesia canis, Hepatozoon canis, Erlichia canis, filaria in dogs, Mediterranean spotted fever, Tularemia
3 hosts life-cycle
“Darth Wader”

Question 20

Family Argasidae

Answer 20

Soft ticks
Ventrally located capituli (camerostome)
No sclerotized scutum
Hypostome w less teeth
Several egg laying
Temporary parasites
Nocturnal
Egg-larva-2 to 6 nymphal-adults
Differentiation through dorsal discs, capituli mood and hypostome

Question 21

Genus Argas

Answer 21

Birds and bats

Inoculation of toxins

Question 22

Genus Ornithodoros

Answer 22

Parasites in mammals+bats
Vector of African swine fever
Pointed capitulum