Term
| What causes feline miliary dermatitis? |
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Definition
fleas! Ctenocephalides felis
-has lots of pruritis |
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Term
| Describe sarcoptes scabiei. |
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Definition
-mites
-burrows
-14 days on host (lifecycle)
-VERY contagious, difficult to recover (repeated skin scrapings)
-REPORTABLE |
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Term
|
Definition
-lesions to pinna, spread to face and feet
-easy to recover |
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Term
| Describe demodex canis/cati |
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Definition
-parasite of hair follicle
-can be localized, generalized, or "old dog syndrome"
-part of normal flora
-diagnose from scrapings
-transmission from mom to babies |
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Term
| What is "walking dandruff"? |
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Definition
-Cheyletiella spp
-entire life on skin surface, can live 10 days without host |
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Term
|
Definition
-Thombiculid mites
-larvae parasitic, appear in summer
-pruritis
-diagnose with skin scraping |
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Term
| Describe otodectes cynotis. |
|
Definition
-ear mite
-spends 3wks of life in ext ear canal |
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Term
|
Definition
-sheep scab
-non-burrowing mite
-can live 30 days off host!
-secondary bacterial infection can cause death |
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Term
|
Definition
-most common ruminant mange
-on escutcheon (cow) or feathered area (horse)
-non-burrowing |
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Term
| Describe pyemotes tritici. |
|
Definition
-Parasite of grain
-self-limiting, NOT zoonotic |
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Term
| Which flies are non-biting/cause fly worry? |
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Definition
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Term
| How do you control the horn fly? |
|
Definition
-parmanent parasite! stays on host
-over winter as pupa, come out in spring, so can kill all at once |
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Term
| What is the significance of control in Simulium (black fly or buffalo gnat/midge)? |
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Definition
-can swarm up to 10 miles a day
-do not enter barns! must keep animals inside all day |
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Term
|
Definition
-enters barns
-no-see-ums
-can cause blue tongue in horses |
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Term
| What is external myiasis? |
|
Definition
-"fly strike"
-flesh flies lay eggs in decaying organic matter
-screw worm fly lays eggs/feeds on LIVING TISSUE |
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Term
|
Definition
-can be sucking or biting
-simple meta
-highly host-specific
-fomite transmission |
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Term
|
Definition
-warbles/bots
-found on head/neck of rabbits and rodents
-can migrate abberently in host, may even reach brain
-removal needs to be complete, otherwise can cause anaphylaxis |
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|
Term
| What is the brown dog tick? |
|
Definition
-rhiphicephilus sanguineus
-ears, toes, neck
-vector of E. canis |
|
|
Term
| What is the american dog tick? |
|
Definition
-dermacentor variabilis
-3 host tick
-vector of Ricky Mountain Spotted Fever |
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Term
|
Definition
-transmits lyme disease (Borrelia burgdorferi)
-endemic to white-footed mouse, transmitted by deer
-deer unaffected |
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Term
| What is internal myiasis? |
|
Definition
-Hypoderma bovis (lays eggs at rear) and Hypoderma lineatum (lays eggs at heel)
--larvae penetrate epidermis, move to esophagus (lineatum) or spinal cord (bovis)
-remain there 2-4 mos
-after, larve migrate to subQ, make breating holes, remain 5-8wks
-crawl out of hole, pupate on ground |
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Term
| Describe oncocerca cervicalis. |
|
Definition
-spread by culicoides
-microfilaria migrate aalong ventral midline, can cause eye lesion |
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Term
| Where do horse and deer flies mate? |
|
Definition
| still or slow moving water |
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Term
| Where do stable flies breed? |
|
Definition
-manure
-can be found feeding on flank/legs |
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Term
| Where do black flies or buffalo gnats breed? |
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Definition
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Term
| Where does culicoides breed? |
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Definition
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Term
| What does culicoides cause in horses? |
|
Definition
-Queensland itch
-distribution on rump
-seasonal occurence, worsens with age |
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Term
| What does horn fly cause in horses? |
|
Definition
-ventral midline dermatitis
-occurs in summer |
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Term
| What does hypoderma cause in horses? |
|
Definition
-VERY uncommon
-can see breathing holes |
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