Lecture 9: Mite infestations Flashcards
What order of mites are free living, predatory mites, blood feeders
Parasitiformes (mesostigmata)
What order of mites are house dust mites, storage mites, scab/scabies mites, ear mites, fur mites
Live entire life on host
Burrow into epidermis, reside on surface of skin or within ear canal
Sarcoptiformes (Astigmata)
What order of mite are chiggers, demodex, follicle mites, itch mites
Trombidiformes (prostigmata)
What type of mite is this
ornithonyssus (mesostigmatid mite)
What type of mite is this
Sarcopetes (astigmatid mite)
What type of mite is this
demodex (prostigmatid mite)
What are chelicerae
Piercing/sucking mouthparts
What are chelae
On ends of chelicerae, scissor like structures
Which type of mite are mainly blood feeders
Mesostigmata
What is the tarsus
Segment at end of leg
What is the pretarsus in mesostigmatids
Sucker like membrane associated with tarsal claws at end of leg
What are tarsal claws
End of legs, double claw
What is the tarsal like in the astimatid mites
End of some legs, includes pedicel (stalk) and caruncle (sucker)
Which type of mite have setae
Astigmatid mites
What are setae
Elongate sensor hairs
What type of mite have tubercles
Astigmatid
What are tubercules
Posterior extensions
How can you prevent mite infestations
Clip hair/clean ears
Use medicated shampoos
Regular cleaning of fomites/bedding
What is a potential treatment for mite infestations
Ascaricides
What is the life cycle for mites
Egg—> larvae—> nymph—> adult
How many nymphal stages do most mites have
2-3
What are the nymphal stages in mites
Protonymph, deutonymph and tritonymph
How long is the entire life cycle of a mite
3 weeks
How are mites primarily transmitted
Direct contact from host to host
What are the blood feeding mites (2)
- Ornithonysus sylvarium (northern fowl mite)
- Dermanyssus gallinae (red poultry mite)
What is the host for ornithonyssus sylvarium
Poultry and wild birds
What is the host for dermanyssus gallinae
Wild and domestic birds
What type of mite is this
Ornithonyssus sylvarium
What type of mite is this
Dermanyssus gallinae
What are the piercing tissue feeding mites (1)
- Eutrombicula alfreddugsei
What is the common chigger harvest mite
Eutrombicula alfreddugsei
What is the host for Eutrombicula alfreddugsei
Many animal species
What mite causes orange crusting dermatosis, intense pruritis, erythema, Papules
Eutrombicula alfreddugsei
The __form in the Eutrombicula alfreddugsei Mite is parasitic
Larval
When the Eutrombicula alfreddugsei Mite pierces skin it injects saliva that digest host tissue and forms a feeding tube called
Stylostome