Arachnida, ticks, mites Flashcards
1
Q
2 families of ticks
A
- soft ticks (argasidae)
- hard ticks (ixodidae)
2
Q
tick metamorphosis
A
- simple (gradual) metamorphosis
- eggs always on soil, hatch
- larvae have 6 legs
- nymphs have 8 legs
3
Q
soft tick feeding
A
attach for a few hours only
4
Q
hard tick feeding
A
- attach for several days
- two phases: slow feeding (1-2d), fast feeding
5
Q
hard tick mouthparts
A
- hypostome
- chelicerae
- palps
6
Q
hard tick one host pattern
A
feed and molt through all instars on the same host
7
Q
hard tick two host pattern
A
- no US species
- ex) rabbit and cow (??)
8
Q
hard tick three host pattern
A
- hosts may be same or different species
- rabbit –> dog –> cow
9
Q
argas persicus
A
- fowl tick
- nest ectoparasites
- multi-host ticks
- gulf of mexico, south america
10
Q
otobius megnini
A
- spinose ear tick
- external ear canal of ungulates
- US, canada, mexico
- modified 1 host life cycle
- larvae and adults do not feed
11
Q
boophilus spp
A
- cattle fever ticks
- one host tick
- babesia, anaplasma transmission
12
Q
amblyomma spp
A
- 3 host ticks, 1 year life cycle
- wide host range
- tropical and semitropical regions
13
Q
amblyomma americanum
A
- lone star tick
- deep bites –> abscesses
- tick paralysis, RMSF, tularemia, etc
14
Q
rhipicephalus sanguineus
A
- brown dog tick/kennel tick
- 3 host tick
- babesia, ehrlichia, hepatozoon, anaplasma
15
Q
dermacentor variabilis
A
- american dog tick
- 3 host tick (rodents, rabbits, dogs, mammals)
- RMSF, tularemia, anaplasmosis, tick paralysis
16
Q
dermacentor albipictus
A
- winter tick
- one host (ungulates)
- ghost moose disease
17
Q
ixodes scapularis
A
- blacklegged tick
- lyme disease, babesia, anaplasma
- larvae: small rodents, birds
- nymphs: rodents –> dogs, humans, deer
- adults: deer, large mammals
- 2 year life cycle
18
Q
ixodes pacificus
A
- western blacklegged tick
- lyme disease
19
Q
important mesostigmatid mites
A
- red mite (dermanyssus gallinae) –> off host
- northern fowl mite (ornithonyssus sylvarium)
- tropical rat mite (ornithonyssus bacoti)
20
Q
canine nasal mite
A
- pneumonyssoides caninum
- direct host to host contact transmission
- tx: avermectin, milbemycin oxime
21
Q
sarcoptes scabei
A
- dogs, pigs, cattle, horses, sheep, humans
- papular dermatitis, hyperkeratotic lesions
- direct and indirect transmission
22
Q
notoedres cati
A
- cats, rats, rabbits
- face mange in cats
23
Q
dermatophagoides spp
A
- house dust mites
- eat fungi on skin scales
- allergenic
