Mite Infestations Flashcards by Lizzie Lab

what are the biological features of mites?

head, thorax, and abdomen fused
larvae - 6 legs
nymph and adults - 8 legs
mites smaller than ticks
most microscopic in size

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what are mites closely related to?

ticks

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what is the active form of the mite prior to the nymph stage?

larva stage

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How are eggs deposited or retained?

deposited by female or retained within female

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label the parts of the Mesostigmatid mite

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what is an adult Mesostigmatid mite called?

mesostigmata

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what is the chelicerae and chelae on the mesostigmatid mite?

chelicerae - piercing/sucking mouthparts
chelae - scissor-like structure

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what are the function of the palps?

sensory mouthparts

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what is an adult Astigmatid mite called?

Astigmata

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what is the segment at the end of a mite?

tarsus

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what are setae?

elongate hairs, sensory

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Label the parts

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what mite is setae and tubercules specific to?

Astigmatid mites

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what structure of Astigmatid mites are special to the male?

tubercules
copulatory sucker

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what is an adult Prostigmatide mite called?

Prostigmata

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what type of mites are Demodex and Eutrombicula?

Prostigmata

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what is the gnathosoma of a prostigmatid mite?

head

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what is the idiosome of a prostigmatid mite?

body

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what can clinical infections of mites results in?

dermatitis, mite-induced allergic reactions, loss of blood or other body fluids, ositis externa and internal tissue damage, and transmission of pathogens

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what are the clinical signs of a mite infestation?

mange/dermatitis
allergic reactions
tissue trauma

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how are mites identified?

detection of adults, nymph, or larvae by direct visualization through a microscope

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how many legs do mite larvae have?

6 legs

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how many legs do nymph mites have?

8 legs

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how many nymphal stages do mites have?

2-3

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how are mites transmitted?

primarily direct contact from host to host

how do mites of veterinary importance infest animals?

feeding externally on host reside/feed subcutaneously reside/feed in internal tissues

what are external mites that are blood feeders?

Ornithonyssus sylvarium (northern fowl mite) Dermanyssus gallinae (red poultry mite)

what is the host of Ornithonyssus sylvarium?

poultry and wild birds, zoonotic

what is another name for Ornithonyssus sylvarium?

northern fowl mite

where does the northern fowl mite life cycle take place?

entire life cycle on the host

what happens to the feathers and skin with a Ornithonyssus sylvarium infestation?

feathers - matted, discolored skin - scaly/scabby & thickened

what is another name for Dermanyssus gallinae?

red poultry mite

what are the hosts of Dermanyssus gallinae?

wild and domestic birds

where does the red poultry mite reside?

off the host, moves to feed on host at night

which mites are these?

what is another name for Eutrombicula alfreddugesi?

common chigger, harvest mite

what are the hosts of the common chigger?

many animal species?

what causes orange-crusting dermatosis?

Eutrombicula alfreddugesi

what are the symptoms of Eutrombicula alfreddugesi?

intense pruritus, erythema, papules

what form of the common chigger is parasitic?

larval form

how do Eutrombicula alfreddugesi nymphs and adults live?

nymphs and adults free living

what mite is this?

what is another name for Psoroptes ovis?

scab mite

what mite is this?

Psoroptes ovis

what are the hosts of Psoroptes ovis?

primarily sheep, cattle, and horses

where is the life cycle of the scab mite?

entire life cycle on the host

what is another name for Chorioptes bovis?

chorioptic mange mite

what mite is this?

Chorioptes bovis

what are the hosts for chorioptic mange mite?

cattle, horses, sheep, goats, rabbits

where is the life cycle of Chorioptes bovis?

on the host

what are the external mites that are piercing tissue-feeders?

Eutrombicula alfreddugesi (common chigger, harvest mite)

what are the external mites that reside/feed on the surface?

Psoroptes ovis (scab mite) Chorioptes bovis (chorioptic mange mite) Psorobia ovis (sheep itch mite) Psorobia bos (cattle itch mite) Cheyletiella spp. (fur mites, "walking dandruff") Lynxacarus radovskyi (cat fur mite)

what is another name for Psorobia ovis?

sheep itch mite

what mite is this? (Genera)

Psorobia spp.

what is the host of Psorobia ovis?

sheep

where is the life cycle of Psorobia ovis?

entire life cycle on host

what is another name for Psorobia bos?

cattle itch mite

what is the host of Psorobia bos?

cattle

where is the life cycle of Psorobia bos?

entire life cycle on the host

what is another name for Cheyletiella spp?

fur mites, walking dandruff

what are the hosts of Cheyletiella spp? (species)

dogs (C. yasguri) cats (C. blakei) rabbits (C. parasitivorax)

how contagious are the fur mite?s

highly contagious by direct contact?

what mite is this?

Cheyletiella spp.

what is another name for Lynxacarus radovskyi mite?

cat fur mite

what are the hosts of Lynxacarus radovskyi?

cats

where are Lynxacarus radovskyi located?

tropical areas of USA

which mite can cause papular dermatitis in humans?

Lynxacarus radovskyi

what mite is this?

what are mites that reside in hair follicles and glands?

Demodex spp.

what are demodex spp. also called?

follicle mites/demodectic mange mites

what are the hosts of Demodex spp?

most domestic animals, host-specific species

where is the life cycle of Demodex spp.?

entire life cycle on the host

what is the clinical disease that Demodex spp. causes?

demodicosis or demodectic mange

what mite is this?

what are the mites that burrow into the skin?

Sarcoptes scabiei (sarcoptic mange mites) Notoedres cati (feline scabies mites) Knemidocoptes mutan (scaly leg mite)

what is the host of Notoedres cati?

cats

what is another name for Notoedres cati?

feline scabies mite

what mite is this?

what is another name for Knemidocoptes mutans?

scaly leg mite

what are the hosts of the scaly leg mite?

chickens, turkeys, and wild birds

where is the life cycle of Knemidocoptes mutans?

entire life cycle on the host

what mite is this?

what mite presents similar to Sarcoptes scabiei?

Notoedres cati

what are the mites that reside internally?

Otodectes cynotis (Ear mite) Raillietia auris (cattle ear mite) Pneumonyssoides caninum (canine nasal mite) Sternostoma tracheacolum (avian nasal mite)

what is another name for Otodectes cynotis?

ear mite

what are the hosts of Otodectes cynotis?

cats and dogs

where is the life cycle of the ear mite?

entire life cycle on host

what is another name for Raillietia auris?

cattle ear mite

what is the host of Raillietia auris?

cattle

what mite is this?