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Gross Pathology > Gross Pathology of Cattle- GI > Flashcards

Gross Pathology of Cattle- GI Flashcards

1
Q

Two conditions to think of with lack of tooth eruption

A
  1. Osteopetrosis (Red Angus calves)
  2. X-linked Ectodermal Dysplasia (will also lack hair)
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2
Q

Ddx for neoplasm at tip of mandible

A
  1. Ossifying fibroma
  2. Ameloblastic odontoma
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3
Q

Cause of gingivitis and mucositis, necroulcerative

A

Fusobacterium necrophorum

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4
Q

Occasional viral cause of ulcerative gingivitis (around teeth)

A

Bovine pestivirus- mucosal disease (BVD)

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5
Q

Genetic defect leading to mucosal and epithelial ulcerations due to friction

A

Epitheliogenesis imperfecta- defect in laminin V

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6
Q

Differentials for lingual ulcerations

A
  1. Mucosal disease (BVD; bovine pestivirus)
  2. Malignant catarrhal fever (ovine-herpesvirus 2)
  3. Vesicular diseases
  4. Epitheliogenesis imperfecta
  5. Rinderpest (bovine morbillivirus)
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7
Q

Gross lesions in adults with bovine aphthovirus

A

Vesicle formation in oral cavity and feet followed by ulceration

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8
Q

Cause of necrotic laryngitis in calves

A

Calf diptheria (fusobacterium necrophorum)

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9
Q

Predisposing factors to calf diptheria

A

Trauma
IBR
Papular stomatitis virus

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10
Q

Cause of wooden tongue

A

Actinobacillus ligneresii

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11
Q

Morph for wooden tongue

A

Granulomatous glossitis

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12
Q

What causes lumpy jaw?

A

Actinomyces bovis

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13
Q

What causes lumpy jaw in kangaroos?

A

Fusobacterium bovis

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14
Q

Morph for lumpy jaw

A

Osteomyelitis, granulomatous

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15
Q

Oral tumors that can invade bone

A

Fibrosarcoma
Lymphoma
Nasal adenocarcinoma

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16
Q

Term for cleft palate

A

Palatoschisis

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17
Q

Classic lesions with mucosal disease (BVD)

A

Coalescing ulcers that begin on posterior hard palate and extend across
or ulceration in esophagus

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18
Q

Cause of pock-like lesions on soft palate, in pharynx, and gingiva around teeth

A

Parapoxvirus- Bovine Papular Stomatitis

19
Q

Morph for parapoxvirus

A

Multifocal to coalescing necrotizing and proliferative stomatitis

20
Q

Esophageal parasite (2)

A

Gonglyonema pulchrum (red ribbon)
Hypoderma linneatum- migration of gadfly larvae

21
Q

Cause of papillomas in GI

A

Bovine papillomavirus-4

22
Q

Cause of ruminal hyperkeratosis

A

Young age, not on roughage
Vitamin A deficiency
High barley in diet
Chloronated naphthalene

23
Q

How does milk bypass the rumen in calves?

A

Ruminoreticular groove

24
Q

What does bovine herpesvirus 1 (IBR) cause in the forestomachs?

A

Ulceration and mucosal loss

25
Q

Which forestomach is not lined by squamous epithelium?

A

Abomasum

26
Q

Gross findings with Malignant Catarrhal Fever

A

NOT mucosal disease
Nasal exudate and corneal edema
Hemorrhage and ulceration throughout GI tract

26
Q

Ruminal flukes

A

Paramphistomum cervi

27
Q

Cause of tremendous hemorrhage on outside of rumen

A

Bovine pestivirus (BVD)

28
Q

A tumor in the esophagus/rumen could be (2)

A

Fibropapilloma
If exposed to ptaquiloside from bracken fern, becomes SCC

29
Q

How to identify omasum

A

Small papillae and leaves

30
Q

How to identify the abomasum

A

Characteristic folds without papillae

31
Q

Abomasal mucosal hyperplasia and hypertrophy (Moroccan leather) with mucous (catarrhal) without inflammation

A

Ostertagus ostertagi

32
Q

What causes thickened abomasal folds

A

BLV with abomasal lymphoma

33
Q

What causes edematous baggy abomasal folds

A

Severe parasite infection- hypoproteinemia (Haemonchus contortus)

34
Q

What are the differentials for Peyer’s patch necrosis?

A

Bovine pestivirus- BVD (mucosal disease)
Bovine morbillivirus- Rinderpest
Acute salmonellosis
Bovine adenovirus type 10 (endotheliotropic)

35
Q

Cause of yellow discoloration of ileum (fibrinonecrotic membrane; necrotizing enteritis)

A

Non-host adapted Salmonella typhimurium (no septicemia)

Note: Salmonella dublin is host adapted so causes septicemia

36
Q

What causes hemorrhagic enterocolitis

A

Coccidiosis- Eimeria auburnensis and Eimeria alabamanensis

37
Q

What entity causes Johne’s Disease?

A

Mycobacterium avium paratuberculosis

38
Q

Disease course of Johne’s disease

A

Animals are infected in first 30 days, but no signs until 2-5 years old; causes rugose pattern in mucosa of gut; causes dystrophic mineralization

39
Q

What causes neonatal bloody scours because they lack trypsin?

A

Clostridium perfringens type C

40
Q

Small intestinal parasite

A

Oesophagostamum radiatum

41
Q

Causes of fibrinonecrotic membrane in the colon (2)

A

Salmonellosis
Mucosal disease

42
Q

Causes of fat necrosis (yellow fat that becomes hard)

A

Fat cattle
Japanese black cattle (genetic)
Fescue with neotyphodium (fungus)
Yellow fat is normal finding in Jerseys and Guernseys

43
Q
A

Gross Pathology (23 decks)

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