Exam II - Word Association Flashcards
(88 cards)
1
Q
Profuse watery diarrhea; most 1st season grazing calves affected. What’s the parasite?
A
Ostertagia ostertagi
2
Q
Mild pathogens; clinical signs only seen when present in large numbers and calves are stressed. What’s the parasite?
A
Cooperia spp.
3
Q
Parasite of donkeys; no observable clinical signs seen. What’s the parasite?
A
Dictyocaulus arnfieldi
4
Q
peri-anal irritation
A
Oxyuris equi
5
Q
Anemic sheep with bottle jaw
A
Haemonchus contortus
6
Q
What is the diagnostic method used for Fasciola hepatica?
A
sedimentation
7
Q
What is the diagnostic method used for large strongyles?
A
fecal egg count and fecal culture
8
Q
What is the diagnostic method used for cyanthostomins?
A
fecal egg count and fecal culture
9
Q
What is the diagnostic method used for Anoplocephala spp?
A
sedimentation, centrifugal/floatation
10
Q
What is the diagnostic method used for Haemonchus spp?
A
fecal egg count and fecal culture
11
Q
What is the diagnostic method used for Sarcocystis neurona?
A
tests on CSF
12
Q
What is the diagnostic method used for Eimeria leukarti?
A
sugar floatation or sedimentation
13
Q
What is the diagnostic method used for Eimeria spp in cattle?
A
McMaster method
14
Q
What is/are the site(s) of infection for Ostertagia ostertagi adults?
A
abomasum
15
Q
What is/are the site(s) of infection for Dictyocaulus viviparous adults?
A
trachea & bronchi
16
Q
What is/are the site(s) of infection for Taenia saginata in cattle?
A
muscle tissue
17
Q
What is/are the site(s) of infection for Oesophagostomum spp adults?
A
large intestine
18
Q
What is/are the site(s) of infection for Giardia intestinalis trophozoites?
A
small intestine
19
Q
5.5-7.5 mm in length; fleshy, spongy mouthparts. What is the parasite?
A
Musca spp.
20
Q
Wing span up to 6.5 cm; slashing/sponging mouthparts. What is the parasite?
A
Tabanus spp.
21
Q
Eggs deposited on hair; 3rd instars found in feces. What is the parasite?
A
Gasterophilus spp.
22
Q
1.5-5.0 mm in length; short, piercing proboscis. What is the parasite?
A
Culicoides spp.
23
Q
Which type of ostertagiosis occurs in winter or spring?
A
Type II
24
Q
True or false: Culicoides spp. transmit Habronema spp.
A
False. Culicoides spp. transmit Onchocerca in horses and cattle
25
True or false: Stable flies may cause an allergic dermatitis
False.
26
True or false: Tabanus spp. inflict painful bites and may transmit several diseases
True
27
True or false: Musca autumnalis transmits African horse sickness
False. Culicoides transmits African horse sickness
28
True or false: Choripotes bovis is found on the distal part of the limbs
True.
29
True or false: Gasterophilus spp pupae provoke an inflammatory reaction in the stomach lining
False. Gasterophilus spp. pupate in the soil. Gasterophilus L3 can cause an inflammatory reaction in the stomach lining
30
True or false: Regarding Sarcocystis spp, fecal contamination results in infection of the final host
False.
31
True or false: Regarding Sarcocystis spp, fecal contamination results in infection in the intermediate host
True.
32
True or false: Regarding Sarcocystis spp, the life cycle stages in the final host won't always result in clinical signs
True
33
The most significant group of parasites challenging horses in North America today are:
small strongyles
34
True or false: the eggs of cyanthostomins are easily differentiated from those of large strongyles
False.
35
True or false: the McMaster method is used to asses the degree to which an equid is contaminating the pasture
True.
36
True or false: Horses do not have inherent resistance to small strongyles
False.
37
True or false: The trophozoite is the infective stage for Giardia intestinalis
False.
38
True or false: In Giardia intestinalis, trophozoites multiply by schizogony and gametogony in cattle hosts
False. Trophozoites multiply asexually (binary fission)
39
True or false: Regarding the beef tapeworm, the oncosphere is the infective stage for the human
False. For Taenia saginata, the oncosphere is the infective stage for cattle
40
Regarding Taenia saginata, what is the infective stage to the final host?
Cysticerci
41
What is the common name for Oesophagostomum spp?
Nodular worm, pimply worm
42
What is the scientific name for the barber pole worm?
Haemonchus placei
43
For Sarcocystis neurona, what is the infective stage for horses?
sporocyst
44
Necropsy of a calf reveals slender white nematodes approx. 8 cm long in the bronchi & trachea and signs of severe bronchitis & pneumonia. Other calves on the pasture are coughing and some are showing signs of breathing through their mouths with their heads and necks outstretched. What's the parasite?
Dictyocaulus viviparous
45
An owner complains that his pony has crusty lesions with thickened skin above the hooves. What is most likely the parasite
Chorioptes bovis
46
True or false: Fascioloides magna is diagnosed in cattle by ID of the eggs in fecal sedimentation
False. Fluke eggs are not seen in feces in cattle, sheep, or goats
47
True or false: In cattle, Fascioloides magna is present in cysts in the peritoneal cavity.
False. In cattle, Fascioloides magna cysts are formed in the liver.
48
Clinical signs seen with Ostertagia ostertagi infection in calves are related to:
the emergence of the nematodes from the gastric glands (becoming an adult)
49
The larvae of this parasite burrows and forms "molting pockets"
Sarcoptes scabei
50
What is the site of infection for Babesia canis?
RBCs
51
"Pipe stem liver" - What's the parasite?
Fasciola hepatica
52
Draschia megastoma is transmitted by:
Musca spp.
53
Bluetongue & African Horse Sickness are transmitted by:
Culicoides spp.
54
Rhipicephalus sanguineus and Dermacentor variabilis both transmit:
Rocky Mountain Spotted Fever
55
Demonstration of oocysts in a fresh fecal exam would most likely be seen in which two parasites?
Cystoisospora (Isospora) canis and Eimeria leukarti
56
Demonstration of trophozoites in a blood smear - associated with which parasite?
Babesia spp.
57
"Summer sores" - what's the parasite?
Habronema spp.
58
"faulty regurgitation" - what's the parasite?
Hypoderma spp.
59
Chronic diarrhea, weight loss, and edema - what's the parasite?
Cyanthostomins
60
How does transmission of Theileria (Cytauxzoon) spp occur?
transmitted via bite of an infected tick (Amblyomma americanum)
61
How does transmission of Dictyocaulus occur?
ingestion of infective larvae
62
How do humans become infected with Sarcocystis neurona?
This parasite does not cause a zoonosis.
63
How do humans become infected with Anoplocephala spp?
This parasite does not cause a zoonosis.
64
How do humans become infected with Toxoplasma gondii?
Ingesting infective uncooked or undercooked meat
65
How do humans become infected with Taenia saginata?
Ingesting infective uncooked or undercooked meat
66
A puppy is presented showing signs of weakness and anemia. The puppy is infested with external parasites which you diagnose as 2 species of dog lice. What are the 2 species?
Trichodectes canis and Linognathus setosus
67
Sarcocystis neurona causes neurological disease in horses. The definitive host may become infected by ingesting a:
mature sarcocyst
68
What is the infective stage for cattle of Taenia saginata?
oncosphere
69
A fecal sedimentation is performed on a heifer with anemia and bottle jaw. The organism below was recovered. How did the heifer aquire this parasite?
The heifer acquired this parasite (Fasciola hepatica) by ingesting metacercariae on vegetation
70
The ________ method is used to assess the degree to which an equid is contaminating a pasture
McMaster
71
True or false: Blow flies may be responsible for cutaneous myiasis in animals
True.
72
"Rectangular basis capituli" - what's the parasite?
*Dermacentor* spp
73
"hexagonal basis capituli" - what's the parasite?
*Rhipicephalus* spp.
74
Pictured are the mouthparts of an ixodid tick. Where are the palps?
Yay!
75
Pictured are the mouthparts of an ixodid tick. Where is the basis capituli?
Woohoo!
76
How long can a pre-emerged *Ctenocephalides* live?
30 weeks
77
Which parasite lays its eggs on fresh, uninfected wounds?
Cochliomyia hominovorax
78
True or false: an important aspect of control for *Stomoxys calcitrans *and *Musca autumnalis *is management of feces and compost
True
79
True or false: Myiasis is the presence of the eggs of dipteran flies in living animal tissue
False, mutha fucka!
Myiasis is defined as the infestation of living animals with the **larvae** of dipteran flies
80
True or false: Cattle grub are often found in lumps on the backs of cattle in the winter
False. Cattle grub (*Hypoderma* spp.) are often found in lumps on the backs of cattle in the **summer.**
81
What is the common name for *Oxyuris equi*?
large pinworm
82
Where would you find arrested larvae of *Strongyloides westeri*?
Somatic tissue
83
Necropsy of a 5 year old pony these stages attached to the lining of the stomach. What is the parasite? Where are its eggs deposited?
*Gastrophilus* spp. Deposited on the forelegs and shoulder of equids.
84
For many fly species, a recommended prevention option is to compost the feces of the host.
In which species will composting the host feces not help?
* ***Tabanus* spp** - eggs are laid in muddy or marshy areas, not feces
* ***Chrysops* spp** - eggs are laid in muddy or marshy areas, not feces
* ***Haematobia irritans*** - flies spend most of their time on the host, so it's unlikely you'd be able to compost the feces in time
85
Causes "blowfly strike" - What's the parasite?
*Cochliomyia hominovorax*
86
Which parasite is responsible for the lesion pictured? Where does the parasite lay its eggs?
*Cochliomyia hominovorax* (New World Screwworm)
Eggs are laid on edges of fresh, uninfected wounds
87
"Lyme-disease tick" - what is the parasite?
*Ixodes* spp.
88
Which parasite is a common vector for *Hepatazoon americanum*?
What is the site of infection for *Hepatazoon americanum*?
*Amblyomma maculatum*
White blood cells
(*Hepatozoon canis* is present in areas of North America where its vector, *Rhipicephalus sanguineus*, occurs)
