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Parasitology > Equine- Culicoides, Tabanids and Chorioptes > Flashcards

Equine- Culicoides, Tabanids and Chorioptes Flashcards

1
Q

What is Culicoides spp. Common name?

A

Biting midges, “no-see-ums”

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2
Q

What is Culicoides spp. Hosts?

A

All domestic animals and humans

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3
Q

What is Culicoides spp. Identification?

A

1.5-5.0 mm long

Mottled wings, short piercing proboscis?

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4
Q

What is Culicoides spp. Life cycle?

A 
Eggs laid in damp marshy ground
Eggs hatch in 2-9 d
4 larval stages completed 14-25 d up to 7 mo
Pupae at edge of water
Flies emerge in 3-10 d
Females suck blood
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5
Q

What is Culicoides spp. Site(s) of infection?

A

General

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6
Q

What is Culicoides spp. Pathogenesis and lesions?

A

Annoyance

Transmits protozoa, helminths (Onchocerca) and viruses

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7
Q

What is Culicoides spp. Clinical signs?

A

Pain inflicted outweighs size of fly

Allergic reaction in some horses

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8
Q

What is Culicoides spp. Diagnosis?

A

Fly identification

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9
Q

What is Culicoides spp. Treatment and prevention?

A

Decrease standing water
Avoid marshy pastures
Treat horse: repellents, insecticides

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10
Q

Tabanids: Gadflies, what is a Gadfly

A

A person who upsets the status quo by posing upsetting or novel questions; being an irritant

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11
Q

What is Tabanus spp. Common name?

A

Horse fly

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12
Q

What is Tabanus spp. Hosts?

A

Large domestic or wild animals, humans, small mammals, birds

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13
Q

What is Tabanus spp. Identification?

A

Stout bodied fly 10 to 50 mm

Mouthparts slashing and sponging

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14
Q

What is Tabanus spp. Life cycle?

A

After blood meal, female lays several hundred eggs in muddy or marshy areas
Whole cycle at least 4-5 mo

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15
Q

What is Tabanus spp. Site(s) of infection?

A

General

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16
Q

What is Tabanus spp. Pathogenesis and lesions?

A

Painful bites
•
Efficient mechanical vectors of several diseases

17
Q

What is Tabanus spp. Clinical signs?

A

Annoyance

18
Q

What is Chrysops spp. Common name?

A

Deer fly

19
Q

What is Chrysops spp. Identification?

A 
Dark bands across wings
Antennae elongate
Bite horses in shaded areas
Horses will stand in sun to avoid
All other aspects like Tabanus spp.
20
Q

What is Chrysops spp. Diagnosis?

A

Identify the fly

Chrysops spp. prefer shade

21
Q

What is Chrysops spp. Treatment and prevention?

A

Cannot control via breeding sites because diffuse and difficult to detect
Control in housing and on animals (repellents, insecticides)

22
Q

What is Acari (Mites) Identification?

A

Microscopic, < 1 mm long
Body have scales, spines, setae (hairs) used in identification
Legs may have claws or suckers used to attach to host

23
Q

What are Acari (Mites) Different strategies with some (species)?

A

Burrowing into host epidermis –Sarcoptes, Notoedres
Non burrowing entirely on skin surface – Psoroptes, Cheyletiella, Chorioptes
Restricted to an area of body – Otodectes

24
Q

What is Chorioptes bovis Common names?

A

Chorioptic mange mite, foot mange, leg mange, itchy heel

25
Q

What is Chorioptes bovis Hosts?

A

Equids, ruminants

26
Q

What is Chorioptes bovis Identification?

A

Feed on skin but do not pierce
Females with suckers on leg pairs 1, 2, 4
Males have suckers on leg pairs 1, 2, 3, 4; pair 4 is rudimentary

27
Q

What is Chorioptes bovis Life cycle?

A

Typical of the non-burrowing mites

Eggs, larvae and nymphs mature to adults in 10 d

28
Q

What is Chorioptes bovis Site(s) of infection?

A

Distal parts of limbs

29
Q

What is Chorioptes bovis Pathogenesis/lesions/clinical signs?

A

Crusty lesions with thickened skin on distal parts of limbs

Moving mites cause irritation

30
Q

What is Chorioptes bovis Diagnosis?

A

Skin scraping of affected areas

31
Q

What is Chorioptes bovis Treatment and prevention?

A

MCL

Parasitology (23 decks)

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