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RUSVM Parasitology > Ascarids > Flashcards

Ascarids Flashcards

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1
Q

What are the characteristics of Arachnids?

A

Nymph and adult : 4 pairs of legs
Larvae : 3 pairs of legs

Cephalo-thorax
Abdomen

No antennae
Palps

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2
Q

What are the two families of ticks?

A

Ixodidae - hard tick

Argasidae -soft tick

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3
Q

What are the life cycle stages of a tick?

A

Egg - larvae - nymph- adult

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4
Q

What are damaging effects of Ixodid ticks

A

Suck blood
Lesions from mouthparts -> predisposed for infections
Transmission of disease
Tick paralysis

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5
Q

Common name of Ixodes spp?

A

Black-legged tick

Deer tick

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6
Q

Host of Ixodes spp?

A

All mammals, birds, humans

Larvae and nymphs feed on mice and adults on deer

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7
Q

ID

Scutum 
Small dark brown 
No festoons 
Long palps 
Anal groove forms an arch anterior to the anus
A

Ixodes spp

Blacke legged tick

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8
Q

Life cycle of Ixodes spp?

A

Three host tick

Females engorge in fall, overwinter and lay eggs in spring

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9
Q

What is the site of infestation of Ixodes spp?

A

Skin

Especially axilla, inguinal region, face, and ears

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10
Q

What is the pathogenesis of Ixodes spp?

A

Paralysis in animals
Local skin reactions to bites
Transmit Borrelia burgdorferi (Lyme disease)

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11
Q

Common name Dermacentor spp?

A

D. Variabilis - American dog tick
D. Andersoni - Rocky Mountain wood tick
D. Albipictus - winter or elk tick
D.nitens - tropical horse tick

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12
Q

Hosts of Dermacentor spp?

A

Larvae and nymph- small rodents

Adult- dog and humans

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13
Q

ID

Dog
Rectangular basis capituli
Short palps
Orate scutum festoons

A

Dermacentor spp

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14
Q

What is the life cycle of Dermacentor spp?

A

Three host tic

Several months to year

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15
Q

Site of infection of Dermacentor spp?

A

Skin around head and neck

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16
Q

What tick species transmits Rocky Mountain Spotted Fever, cytauxzoonosis, and can cause tick paralysis

A

Dermacentor spp

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17
Q

What is the common name of Rhipicephalus sanguineus?

A

Brown dog tick

Kennel tick

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18
Q

Host of Rhipicephalus sanguineus ?

A

Dog and human

Southern US

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19
Q

ID
Dog

Hexagonal basis capituli
Inornate scutum
Short palp
Festoons

A

Rhipicephalus sanguineus

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20
Q

What is the life cycle of Rhipicephalus sanguineus?

A

Three host tick

Adapted to indoor living

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21
Q

What is the site of infestation of Rhipicephalus sanguineus ?

A

Adult- between toes and ears

Larvae and nymphs- back of neck

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22
Q

What tick species transmits Babesia canis and Eherlichia canis?

A

Rhipicephalus sanguineus

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23
Q

What are the treatment and prevention methods of ticks in cats and dogs?

A

Manually remove tick

Acaricides

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24
Q

What tick only infects one host in its life cycle?

A

Rhipicephalus (Boophilus) spp

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25
Hosts of Rhipicephalus (boophilus) spp?
Cattle and other large hosts
26
ID Cattle Hexagonal basis capituli Prominent dorsal ridges Short palps
Rhipicephalus (Boophilus) spp
27
What is the site of infestation of Rhipicephalus (Boophilus) spp?
Ventral aspects of body (adults) Immatures in ears
28
What tick species cause transmits Bovine piroplasmosis and gallsickness?
Rhipicephalus (Boophilus) spp
29
Common name of Amblyomma spp?
Lone star tick Gulf Coast tick Tropical bone tick
30
Host of Amblyomma spp?
Human Livestock Dog Cat
31
ID Long palps Ornate scutum Banded legs
Amblyomma spp
32
What is the pathogenesis of Amblyomma spp?
Painful bite (large mouthparts) Transmit disease -rickettsial -hepatozoon americanum Cytauxzoon felis
33
What hard tick is reportable ?
Rhipicephalus (boophilus) spp
34
Common name of Rhipicephalus (Boophilus) spp?
Blue tick Cattle fever tick Tropical cattle tick
35
Soft ticks belong to the order ___________
Argasidae
36
What are the characteristics of soft ticks (Argasids)
No dorsal Sheila/scutum Leather tegument, spinose and bumpy Mouthparts ventrally placed >2nymph stages
37
What are the two genus of Argasidae?
Otobius spp -spinose ear tick Argas spp- fowl tick
38
Common name of Otobius spp?
Spinose ear tick
39
Host of Otobius spp?
Livestock, human, dog
40
Pathogenesis of Otobius spp?
Ear canal affected seriously in large tick buildup Heavy infestation leads to anemia
41
Commonname of Argas spp?
Fowl tick
42
Host of Argas spp?
Domestic and wild fowl
43
ID Fowl Soft tick Leathery, textured body, lateral line/crease
Argas spp
44
Life cycle to Argas spp?
Engorge rapidly Survive arid conditions Transmit pathogens
45
ID Microscopic, <1mm long Body with scales, spines, setae(hairs)
Mites
46
What are the three life strategies of mites?
Burrowing - Sarcoptes and Notoedres Non-burrowing -Psoroptes, Cheyletiella, Chorioptes Restricted -Otodectes
47
Common name of Sarcoptes scabiei
Sarcoptic mange Itch mite Scabies mite
48
Host of Sarcoptes scabiei?
All domestic animals and humans
49
What are the life cycle stages of Sarcoptes scabiei?
Eggs larvae nymph adult
50
What are the clinical signs of S. scabiei in dogs?
Begin on hairless areas Follicular papules Erythema Crust of dried serum and blood Pruritus
51
What is the main mode of S. scabiei between swine?
Sows to piglets during suckling Boars to gilts
52
What is the pathogenesis of S. scabiei in swine?
Pigs itch -> lose condition First lesions are wheals; erythema around eyes, snout, external ear, front of hock Progress to scabs Crusty lesions ->hyperkeratosis
53
How do you diagnose a mite infection
Mites from ear wax Skin scraping Clinical signs- pruritus
54
What is the pathogenesis of S. scabiei in cattle?
``` Scaly skin (mild) Thickened skin (heavy) Downgrading of hides, drop in meat /milk production ```
55
A Sarcoptes scabiei infection in what species is reportable?
Cattle
56
What is the treatment for Sarcoptes scabiei?
MCL (dog, cattle, and swine) Treat sows before farrowing Eprinomectin for lactating dairy cattle
57
What is the common name of Notoedries cati?
Noteodric cat mite
58
Hosts of Notoedres cati?
Cat | Occasionally dog or rabbit
59
Site of infestation of Notoedres cati?
Head
60
Common name of Knemidocoptes spp?
Scaly leg mite | Scaly face mite
61
Host of Knemidocoptes spp?
Chicken and turkey | Cage bird
62
Site of infestation of Knemidocoptes spp?
Under scales of leg, comb, wattles, and neck
63
______________ leads to inflammation and keratinization of skin of legs/face, lameness, or malformation of feet in birds
Knemidocoptes spp
64
Choriopes bovis hosts?
Cattle, small ruminant, equids Non-burrowing mite
65
ID Mite Rounded mouthparts Sucker shape at end of stalks
Chorioptes bovis
66
Site of infestation of Chorioptes bovis?
Tailhead, udder and legs
67
Common name of psoroptes ovis?
Sheep scab mite
68
Host of Psoroptes ovis?
Sheep and cattle
69
ID Mite Oval Pointed mouthparts Causes scab mange
Psoroptes ovis Mouthparts-pierce and chew
70
Diagnose Sheep Zone of inflammation with serous exudate Dry crust with moist borders Itching, restless rubbing, scratching, ragged wool
Psoroptes ovis
71
What mite species rapidly spreads during winter but is found in axilla, groin, and inner pinna during summer
Psoroptes ovis
72
What mite infections are reportable?
Psoroptes ovis Sarcoptes scabiei - cattle
73
Common name of Otodectes cynotis
Ear mite
74
Host of Otodectes cynotis
Dog, cat, ferret, fox, rabbit, human
75
Site of infection of Otodectes cynotis
Ear
76
Diagnose Cat Dry waxy parchment-like material in ear Like coffee grounds
Otodectes cynotis
77
Host of cheyletiella yasguri
Dog and human
78
Pathogenesis of Cheyletiella yasguri ?
"Walking dandruff" in fur and hair
79
Diagnosis of Cheyletiella yasguri?
Adhesive tape or scotch tape swab
80
Common name of Demodex canis? What is the host?
Demodectic mange mite Follicle mite Dog
81
Where is Demodex canis found?
Hair follicles and sebaceous glands (entire life cycle)

RUSVM Parasitology (12 decks)

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