L10: Mites Flashcards
physical characteristics of mites
- head, thorax and abdomen are fused
- larvae have 6 legs, nymphs + adults have 8 legs
- mites are microscopic
what order of mites are blood feeders
Mesostigmata
Demodex and Eutrombicula belong to what order of mites
Prostigmata
what is this
Demodex
(Prostigmatid mite)
what order of mites
Mesostigmata
what order of mites
Astigmatid
almost all mites have how many nymphal stages
2 or 3
mite eggs hatch into ___ legged larvae and then the larvae molt into ___ legged nymphs
6, 8
on average, how long is the mite life cycle length
about 3 weeks
how are mites primarily transmitted
by direct contact from host
Ornithonyssus sylvarium
Northern fowl mite
external mites - blood feeders
what is the host of Ornithonyssus sylvarium
poultry and wild birds
Ornithonyssus sylvarium spend their entire life cycle on ….
the host
Dermanyssus gallinae
red poultry mite
external mites - blood feeders
what are the hosts of Dermanyssus gallinae
wild and domestic birds
Dermanyssus gallinae mostly reside ____ and move to the host to _____
off the host
feed at night
Eutrombicula alfreddugesi
common chigger, harvest mite
what is unique about Dermanyssus gallinae
only the larval stage is parasitic!
what stage(s) of Dermanyssus gallinae are free living (feed on decaying matter and insects in soil)
nymphs and adults
what are the clinical signs of infestation by eutrombicula alfreddugesi
organge cursting dermatosis
intense pruiritis, erythema, papules
Psoroptes ovis
scab mice
what are the hosts of Dermanyssus gallinae
poultry
Dermanyssus gallinae spend their entire life cycle on ______
the host
Chorioptes bovis
Chorioptic mange mite
what are the hosts of Chorioptes bovis
cattle, horses, sheep, goats, rabbits
predilection site of Chorioptes bovis
lower hing legs and tail
Psorobia ovis
sheep itch mite
Psorobia bos
cattle itch mite
Cheyletiella spp
fur mites “walking dandruff”
Cheyletiella yasguri affect ..
dogs
Cheyletiella blakei affect…
cats
Cheyletiella parasitivorax affect….
rabbits
Lynxacarus radovskyi
cat fur mite
mites that reside in hair follicles and glands
Demodex spp
what are the hosts of Demodex spp
most domestic animals; there are also host-specific species
what mite is this
Demodex mites
Demodex spp spend their entire life cycle on..
the host
Sarcoptes scabiei
sarcoptic mange mites
what are the hosts of Sarcoptes scabiei
most domestic animals; there are also host specific species
Notoedres cati
feline scabies mites
Knemidocoptes mutans
scaly leg mite
hosts of Knemidocoptes mutans
chickens, turkeys, wild birds
mites that burrow under the superficial epidermis of the feet of chickens, turkeys, wild birds
Knemidocoptes mutans
mites that affect cats, characterized by crust formation, alopecia and hyperkeratosis
Otodectes cynotis
ear mite of dogs and cats
Raillietia auris
cattle ear mite
Pneumonyssoides caninum
canine nasal mite
found within nasal canals of canines, causes chronic sneezing
Pneumonyssoides caninum
Sternostoma tracheocolum
avaian nasal mite
blood sucking mite of the respiratory system, hosts are wild and domestic birds, can result in chronic respiratory illness
Sternostoma tracheacolum
Pyemotes tritici
hay itch mites
*environmental mite
* potential as biological pest control
which mite burrows into the epidermis of its host, causing an intensely pruritic, erythematous papular rash?
Sarcoptes sacabiei
chiggers are unique in that…
the larval stage is parasitic by secreting digestive enzymes that break down host tissue
what physical structures are unique to the male Astigmata mite
- copulatory sucker for adherence to a female
- tubercules: postesior extensions
what type of mites have setae: elongated sensory hairs
Astigmata
what type of mite is composed of a Gnathosoma: head and Idiosoma: body
Prostigmata
what type of mite is Demodex spp
Prostigmata
what type of mite is Eutrombicula (chiggers)
Prostigmata
what type of mite is Chorioptes bovis
Astigmata
what type of mite is Ornithonyssus sylvarium
Mesostigmata
