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Parasitology > Parasitology Prac Exam > Flashcards

Parasitology Prac Exam Flashcards

(98 cards)

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1
Q

Describe an Oocyst

A

Oocyst

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2
Q

Describe an oocyst

A

Egg like stage of coccidian parasite (Apicomplexa)

Passed in the faeces in the undeveloped (unsporulated form)

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3
Q

Examin a Cat

Example in a Dog

Example in a Pig

Example in a Horse

A

Toxocara Egg

Toxocara Cati

Toxoccara Canis

Ascaris Suum

Parascars Equorum

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4
Q
A

Eggs of Toxocara spp (T.canis or T.cati)

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5
Q
A

Trichus Egg

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6
Q
A

Eggs of Trichus Spp

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7
Q
A

Large Egg = Nematodirus

Small Egg = Strongylid

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8
Q
A

Strongylid Egg

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9
Q
A

Nematodirus egg

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10
Q
A

Unfed Larvae

Larval ticks have 6 legs rather than 8, but otherwise appear similar in shape to the adult but are much smaller

Sometimes referred to as the seed ticks due to their small size, larvae seek out a new host, often clambering to the tops of blades of grass to acheive this

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11
Q
A

Haemaphysalis Eggs and Larvae

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12
Q
A

Haemaphysalis Adult

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13
Q
A

Unfed and Fed Nymphs

The nymph has 8 legs like the adult, but is still smaller and must undergo one last moult

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14
Q
A

Haemaphysalis Longicornis - mouthparts

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15
Q
A

Adult Haemaphysilas Logicornis

This tick is an adult female specimin, that has not yet fed.

All adults of this specimen are females

Have a dark dorsal shield extending back behind the mouthparts

Adults have 8 legs that attach to the ventral surface of the anterior portion of the body in two rows. The mouthparts point fowards

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16
Q
A

Top = engorded

Bottom = unfed

Haemophilaus longicorns adults

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17
Q

Sheep, Cattle and Horses

A

Chorioptes Bovis

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18
Q
A

Can be found on sheep, cattle and horses

Scrotum of rams tail of cattle and legs of horses

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19
Q

Bird

A

Cnemidocoptes mutans

A burrowing mitee causing scaly leg in birds particulary chickens

Note very short legs - hindpairs do not project beyond the posterior margin of the body

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20
Q
A

Demodex Mite

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21
Q
A

Localised Demodex

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22
Q
A

Generalised Demodex

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23
Q
A

The small cigar shaped mite lives in the hair follicle

Narrow shape allows it to live beside the hairshaft

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24
Q
A

Demodectic mange - follicles become distended with large numbers of mites and purulent material and the hair shafts fall out

Distended follciles appear as pustules and may rupture and there may be a more severe inflammatory reactions

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25
Cheyletiella
26
Non- Burrowing Mite Chyletiella This large mite wanders over the skin surface and is just visible to the naked eye Walking dandruff
27
Chyletiella Species
28
Chyletiella
29
Guinea Pig
Trixacarus Caviae
30
Trixacarus ccaviae Guinea Pig mite A sarcoptiform mite which causes skin disease in guinea pigs
31
Otodectes Cynotis
32
Non-burrowing mite The legs of otodectes are long and project well beyond the body margin The forth leg is a little shorter than the others
33
Otodectes can be seen with the naked eye
34
Rabbits and Horses
Psoroptes cuniculi Found in the ears of animals such as rabbits and horses All herbiores Related to sheep scab causes otitis externa
35
Sarcoptes Scabei
36
Sarcoptes mites have 8 legs in the adult and the nymph stages. The legs are short and stumpy and and the hind legs do not project much beyond the posterior body margin Each leg bears a sucker on a stalk
37
Sarcoptic Mange Sarcoptes mites burrow into the superficical layes of the epidermis and cause the very itchy condition sarcoptic mange
38
Pulex Irritans Note: Absence of combs Absence of combs below and behind its head
39
Flea Larvae
40
Ctenocephalides
41
Ctenocephalides felis
42
Cat
Felicola Subroutratus A biting lice found on cats Distinctive pointed head
43
Comparison of biting and sucking lice
44
Dog
Trichodectes canis Biting louse of dogs
45
Dog
Linognathus setosus Sucking louse of dogs
46
Pig
Haematopinus suis Large sucking louse found on pigs
47
Horse
Haematopinus asini The horse sucking louse VERY BIG
48
Horse
Bovicola equi Biting lice of horse
49
Sheep
Linognathus pedalis Hairy parts of sheeps legs L1 smaller than L2
50
Sheep
Bovicola ovis Biting lice of sheep Looks similar to B. Bovis
51
Cattle
Lingonathus vituli Sucking louse of cattle Lousy animals are dirty
52
Cattle
Bovicola bovis Biting lice of Cattle
53
Oestrus ovis adult
54
Oestrus ovis larvae How to diffirentiate fron Gatrophilus?
55
Oestrus ovis adult female Less hairy then the bot fly Mouth parts are degenerate and they do not feed
56
Oestrus ovis third stage larvae They are found in the frontal sinus of the sheep where they feed on the muccosal lining and nasal secretions
57
Gasterophilus larvae The L1 through to L3 can all be found inside the horse
58
Horse bots - Larvae Parasites in the stomach - ventral view of the third stage larvae
59
Gastrophilus Adult
60
Bot fly of horses Hairy bee like fly With no mouth parts, adults do not feed Sole job is to reproduce
61
Stomxys Calcitrans
62
Stomoxys calcitrans Stable fly - blood sucking disese vector Common in NZ cause of irriations to cattle, horses, humans
63
Head of Stomays calcitrans the stable fly in feeding the entire proboscis is thrust into the skin of the host
64
Calliphora vicina Bluebottle flies can also be secondary flies
65
Calliphora vicina
66
Chromosoma rufficacies Bright green, bands of black colour Commonest secondary flystrike species Resembles Lucillia but each body segment has a band Maggots are SPIKY
67
Calliphora stygia NZ third primary flystrike blowfly species Blackish body that is coloured with fine golden brown hairs
68
Lucilia Sericata No black bands Primary strike
69
Genus Lucillia
Classic greenbottles Lucilia Cuprina relies on live sheep L sericatea and L cuprina are both primary srike species and are hard to tell apart
70
Giardia
71
Babesia (dark red inclusion bodies in RBCs) Transmitted by a tick
72
Thileria orientalis How to tell apart from Babesia?
73
Thileria parva
74
Sarcocystitis gigantea Large macro sarcocysts in the muscle
75
Sarcocyst
76
Sarcocystitis
77
Syngamus trachea
78
Syngamus Trachea Small male and much larger female in copulation
79
Synagmus trachea Found in the trachea of numerous avian species Common name is grapeworm
80
81
Aeluostrongylus abstrusus
82
Left + inflammatory cells and eggs \* Right = normal
83
Aeluostrongylus abstrusus head
84
Aeluostrongylus abstrusus tail
85
Dictocaulus viviparus gross specimem
86
In the larger airways covered by foamy mucus
87
Corss sections of females can be seen containig larvated eggs in the small airways. Epithelium is hypertrophied
88
up to 10cm long can be found in the bronchioles, bronchi and occassionally the trachea More likely yo be found in diaphragmatic lobe Direct lifecycle
89
Dictocaulus spp. tail
90
Dictocaulus spp. head
91
Metastongylus spp Found in the bronchi, brochioles of pigs mainly in the diaphragmatic lobe
92
Metastrongylus spp Anterior end: Simple mouth surrinded by obvious lips (two lateral lips each with three lobes)
93
Matastrongylus spp. gross specimen
94
Filaroides osleri Note: bumps at biforcation (tracheal) Slender worms are hard to remove from nodules
95
96
97
Cat Strongylid
98

Parasitology (1 decks)

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