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DTW Exam 4 > Parasitology - Arthropod 2 > Flashcards

Parasitology - Arthropod 2 Flashcards

1
Q

Order Diptera

A

Adults have 1 membranous wings
Complex meta
No parasitic stages

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2
Q

What irritations do flies cause? (4)

A

Fly worry
Fly bites (FBD)
Skin damage
Disease transmission**

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3
Q

What irritants do larvae cause?

A

Some are obligate parasites/facultative parasites

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4
Q

Fly species (4)

A

Musca domestica
Musca autumnalis
Haematobia irritants
Stomoxys calcitrans

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5
Q

Distinguishing features of Musca Domestica

A

House fly
Non biting/non parasitic
Fly worry, disease vector
Eggs in organic material
Generation time - 2 weeks

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6
Q

Features of Musca autumnalis

A

Face fly
Cattle, non biting, females eat tear secretions for proteins
Fly worry, eye irritation, transmit bovine pinkeye

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7
Q

Features of Haematobia irritants

A

Horn fly
Sit dorsum (ventral when hot) on cattle
Resident parasites
Eggs in fresh manure, 10-12 days

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8
Q

Haematobia irritans irritants

A

Fly worry, feed 20x day
FBD, bacteria causing mastitis
Most important external parasite in US cattle

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9
Q

Stomoxys calcitrans

A

Stable fly
Most important biting fly (esp 3rd world countries)

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10
Q

Stomoxys calcitrans cycle and irritants

A

Bites lower body/feet of livestock
Lay eggs in decaying organic material, visit host 1-2x day. Duration: 28-30 days
FW, FBD

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11
Q

Family Tabanidae

A

Horse/deer fly
Lay eggs near water, bite/feed every 3 days
FW, painful bites, key for mechanical vectors of disease

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12
Q

Culicidae
Life cycle & pathogenicity

A

Mosquitos
Eggs in water, wide variation, females are parasitic

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13
Q

Culicidae
Importance

A

FW, FBD, disease vector: heart worm, encephalitis viruses, avian malaria, West Nile virus

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14
Q

Simuliidae

A

Black flies/buffalo gnats
Eggs in rapid water
Intense FW = stampedes
FBD, avian hemprotorozoa, EEE, vesicular stomatitis

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15
Q

Culicoides spp

A

No see, midges (pass through wire screens)
Larvae in moist soil/water
FW, FBD in EQ = Sweet itch, transmits blue tongue in ruminants

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16
Q

Hippoboscidae

A

Bloodsucking, wingless, flat body, sheep/goats

17
Q

Mechanical fly control - LA

A

Screens/doors, sheets/masks

18
Q

Manure control - LA

A

Removal, feed pesticides, parasitoid

19
Q

Pesticides fly control - LA

A

Food animals: dust bags, back rubs, ear tags, pour on
Horses: sprays, pour on

20
Q

Myiasis definition

A

Any infection due to the invasion of the tissues or cavities of the body by the larvae of dipterous insects

21
Q

Myiasis two types

A

Cutaneous Myiasis: fly strike, maggots
Internal Myiasis: grubs, warbles, bots

22
Q

Fly strike

A

Larvae of blow flies, metallic color, larvae called maggots, facultative parasites

23
Q

Fly strike life cycle

A

Eggs in decaying org material
Larvae feed necrotic material
Pupate on ground
Females attracted by secretions from wounds, fecal material

24
Q

Fly strike diagnosis & treatment

A

Presence of maggots
Depressed from toxemia
Remove maggots

25
Q

Fly strike prevention

A

Wound spray in season, castrate, dehorn prior

26
Q

Screwworm taxonomy

A

Cochliomyia hominivorax

27
Q

Screwworm features

A

Obligate parasite - requires living tissue
Produces severe disease, eradicated by sterile male release program (male mate 4x, female mate 1x)

28
Q

Internal Myiasis main features

A

Larvae = bots, grubs, warbles. Obligate internal parasites
Hairy, adults don’t feed

29
Q

Gasterophilus spp life cycle

A

Horse bots, common
Eggs laid on face/legs
Hatch & migrate to mouth, gums /tongue
Move to stomach for 10-12 months
Pass in manure

30
Q

Gasterophilus spp clin signs, diagnosis, treatment

A

Not pathogenic, no specific clin signs
See flies, eggs
Ivermectin, annual treatment/removal

31
Q

Cuterebra spp life cycle

A

Rodent bot flies
Parasites of rodents, rabbits
Eggs near burrows/trails
Develop subQ cyst

32
Q

Cuterebra spp clinical signs, treatment/control

A

Lumps, openings, secondary infection, abnormal migration
Remove carefully
Common in dogs/cats, found on head/neck

33
Q

Order Hemiptera

A

Bugs
Bed bugs (cimex spp)
Kissing bugs (triatomid)

DTW Exam 4 (15 decks)

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