export_final exam anat path cattle cases

Question 1

multifocal hemorrhage of grey and white cerbral cortex and thalamus in cattle- cause and clinically

Answer 1

ITME- H somni clinically: calves sudden death, ataxia, recumbancy, blindness, fever

Question 2

fibrinous pericarditits and hemorrhagic MYOcarditits cause in cattle (not endocarditis or pericarditis)

Answer 2

Blackleg- Clostrid chauvei

Question 3

how confirm diagnosis of ITME

Answer 3

bacterial culture

Question 4

other causes of brain dz in feedlot calves;

Answer 4

Polio (sulfur tox or grain overload) Lead tox Rabies Less common: Listeria, nervous coccidiosis, hypo vit A

Question 5

Is a bloat line pathognomonic for bloat?

Answer 5

no- bacteria after daeth can produce gas that can create such a line

Question 6

Other lesions that point to ruminal bloat

Answer 6

congestion of facial soft tissue, esp nasal turbinates +/- inguinal edema from lymphatic blockage

Question 7

pathogenesis of C. Chauvei:

Answer 7

spores in envir ingested and latent in mm- bacteria becomes active when muscle is damaged or hypoxic -bacteria releases endotoxin and increases vasculature permiability leading to fibrinous pericarditis and myocardial hemorrhage

Question 8

• how confirm dx of C. Chauvei

Answer 8

FA on frozen section- culture is too difficult

Question 9

Vesicular dz of cattle:

Answer 9

Vesicular stomatitis FMD Dx: call CFIA!

Question 10

other causes of erosion on tongue other than vesicular dz of cattle:

Answer 10

-caustic agents -BVD -papular stomatitis

Question 11

white worm in caudal trachea that causes atelectasis of cranial lungs= and where cattle get it?

Answer 11

Dictyocaulus vivi Cattle get it from eating pasture

Question 12

which lung worm do we see the most in ON with sheep?

Answer 12

Muellaria (not Dictyocaulus)

Question 13

suppurative necrotising myocarditis- think:

Answer 13

H somni

Question 14

H. somni causes:

Answer 14

ITME septicemia: pleuritis, pericarditis, polyarthritis bronchopneumonia: just like Manheimia

Question 15

causes of polyarthritis in feedlot cattle

Answer 15

Mycoplasma bovis H. somni (less obvious)

Question 16

etiology(s)

Answer 16

Manheimia

Histophilus somni (look same)

Question 17

how age lung lesions?

pleural adhesions vs abcessation

Answer 17

pleural adhesions- 7-10d

abscesses: at least 2wks

Question 18

does absence of pleural adhesions or abscess mean lesion is acute

Answer 18

no, not nec

Question 19

lesion: cranioventral lung is rubbery, atelectatic, and congested; but is not as hard as would be expected in bacterial bronchopneumonia. etio:

Answer 19

BRSV(*)

PIV3, Corona maybe

Question 20

confirm BRSV via

Answer 20

IHC- brown staining Ag in bronchiolar epithelium

VI not good b/c too hard to grow

Question 21

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Answer 21

BRSV with IHC

Question 22

what gross findings= rumenal acidosis or grain overload (3)

Answer 22

1. fixation of rumenal mucosa to wall
2. acidic rumen content (soon after death)
3. histo: clustering neuts within ruminal mucosa

Question 23

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Answer 23

endocardial hem in ruminants is incidental! neither is epicarial “agonal” hemorrhages

Question 24

etiology

Answer 24

MAP= Johnes

Question 25

how confirm MAP?

Answer 25

histo- ileum and LN mycobact culture but takes 4-6months to grow

Question 26

what want to RO with MAP testing

Answer 26

Salmonella

Question 27

cranioventral 60% of the lung is consolidated, reddened, and contains numerous white nodules. On cut section, these nodules are white, circular, coalescing, bulging, and palpation reveals that they are friable and crumbly- etio

Answer 27

MycoPLASMA bovis | vs. one large lesion in Mycobactium bovis= tb

Question 28

if need to confirm Mycoplasma bovis (if PM lesions not characteristic enough)

Answer 28

IHC and histo

Question 29

culture good for dx Mycoplasma bovis?

Answer 29

no- can be cultured from N lungs

Question 30

pathogen of Mycoplasma bovis

Answer 30

-opportunitistic bact grows after Manheimia makes unhealthy tissue- attacks lung after antibiotics kill manheimia= chronic infection

Question 31

best strategy to prevent Mycoplasma bovis:

Answer 31

prevent shipping fever pneumonia and early detection since no specific control measures and it's resistant to antibiotics= chronic infection

Question 32

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Answer 32

white mm disease

Question 33

other dz's that can cause myocardial necrosis like WMD

Answer 33

- monensin, lasalocid | - doxy, cottonseed meal, toxic plants less commonly

Question 34

should test for vit E and Se levels in tissue wehn dxing WMD?

Answer 34

not worth while- just confirm with histo

Question 35

how prevent WMD

Answer 35

supplement Vit E and Se

Question 36

cortex fluoresces under UV- ddx

Answer 36

Polio -identical lesions can be caused by thiammine deficiency, sulfur tox, lead toxicity

Question 37

animals with polio respond to____

Answer 37

thiamine tx if treated early

Question 38

when does thiamine deficiency occur (is it nutritional?)

Answer 38

not nutritional- more secondary to grain overload and abN ruminal bacteria

Question 39

if a lot of animals have blindness, head pressing, opisthotonas- tell prod what

Answer 39

giving too high energy rations = thiamine deficiency

Question 40

IBR (BHV-1) kill calfs with rhinotrach?

Answer 40

no- but impairs muco-cil clearance so die from 2nd bact invaders

Question 41

where sample tissue for confirmation of IBR

Answer 41

trach or nasal epith- not lungs "harvest tissue that have lesions"

Question 42

http://classconnection.s3.amazonaws.com/122/flashcards/2930122/jpg/1-14547217A2E633C9879.jpg

Answer 42

amnion with plaques (focal squamous metaplsia of no significance)

Question 43

how know it's the amnion?

Answer 43

no cotyledons

Question 44

kidney and those below show the opened abomasum and duodenum, with lesions in the perirenal fat and in the omental fat. The lesions are hard but crumbly - etio:

Answer 44

abdominal fat necrosis- incidental finding

Question 45

abomasal ulcer in suckling calf dt

Answer 45

unknown- not stress

Question 46

duodenum in normal position should run ____and ____ from abomasum

Answer 46

dorsal and caudal (not cranioventral)

Question 47

http://classconnection.s3.amazonaws.com/122/flashcards/2930122/jpg/1-145472BCEEA4938EE1A.jpg

Answer 47

adventitial placental with TNCT tiny caruncles and cotyledons with four normal sized ones

Question 48

adventitial placental means what?

Answer 48

placental insufficiency- no specific etio

Question 49

bone marrow gelatinous can signify

Answer 49

negative E balance (eg. MAP)