TNPSC Animal Husbandry & Veterinary Science (Degree Standard), Code 396 · India · Tamil Nadu Public Service Commission
Original practice questions written to the published syllabus · not past papersLesions organ system by organ system, plus the pathology of nutritional and production diseases.
In the exams: ICAR AICE-JRF core group 06; ICAR AIEEA-PG 13 (Pathology)
How our questions for TNPSC Animal Husbandry & Veterinary Science, Code 396 spread across the units of Systemic Veterinary Pathology. Difficulty: 13 easy, 7 medium, 0 hard.
| Pathology of the gastrointestinal tract | 2 | |
| Pathology of the urinary system | 2 | |
| Pathology of the nervous system | 2 | |
| Pathology of the musculoskeletal system | 2 | |
| Pathology of the reproductive system | 2 | |
| Pathology of the endocrine system | 2 | |
| Nutritional pathology | 2 | |
| Production pathology | 2 | |
| Pathology of the cardiovascular system | 1 | |
| Pathology of the respiratory system | 1 | |
| Pathology of the liver | 1 | |
| Pathology of the skin | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
The term 'nutmeg liver' describes which lesion?
A. Chronic passive congestion of the liver from right-sided heart failure
Right-sided failure raises central venous pressure, so centrilobular sinusoids stay congested (dark) while periportal tissue is pale or fatty, giving a nutmeg pattern on the cut surface. Lipidosis makes the whole liver uniformly yellow and greasy, not mottled in a lobular pattern.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
The most common distribution of bronchopneumonia in domestic animals is:
A. Cranioventral
Inhaled organisms settle in the cranioventral lobes, so bronchopneumonia starts there. Diffuse lesions suggest interstitial pneumonia and random multifocal lesions suggest embolic pneumonia; caudodorsal lesions suggest lungworm or porcine pleuropneumonia.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
Wooden tongue in cattle is caused by:
C. Actinobacillus lignieresii
Actinobacillus lignieresii causes pyogranulomatous inflammation of soft tissue, notably the tongue. Actinomyces bovis causes lumpy jaw, an osteomyelitis of the mandible; the two are often confused.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
A sharp 'bloat line' in the cervical oesophagus at necropsy of a cow indicates:
C. Ante-mortem ruminal tympany (bloat)
Ante-mortem bloat compresses the thoracic oesophagus and veins, leaving the cervical part congested and the thoracic part pale with a sharp junction. Post-mortem gas forms after circulation stops, so it cannot create this congestion boundary.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
Enzootic bovine haematuria, with haemorrhagic cystitis and urinary bladder tumours, is associated with prolonged ingestion of:
A. Bracken fern (Pteridium)
Ptaquiloside in bracken fern is a carcinogen that causes bladder haemorrhage and tumours after long-term grazing; bovine papillomavirus may act with it. Oak causes acute tubular nephrosis and Lantana causes hepatogenous photosensitisation.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
Hansen type I intervertebral disc disease occurs typically in:
B. Chondrodystrophic breeds such as the dachshund
Type I is acute extrusion of a degenerated, often mineralised nucleus pulposus in chondrodystrophic breeds. Type II, a slow protrusion of the annulus, is typical of older non-chondrodystrophic dogs.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
A freemartin is a sterile heifer born twin to a bull because of:
C. Placental vascular anastomoses causing XX/XY chimerism
Fusion of placental circulations allows exchange of cells and hormones, so the female twin becomes a chimera with masculinised, hypoplastic reproductive organs. Campylobacter fetus causes infertility and early embryonic death, not freemartinism.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
The most common cause of spontaneous hyperadrenocorticism in dogs is:
A. A functional pituitary corticotroph adenoma or hyperplasia (pituitary-dependent)
About 80-85% of canine Cushing's syndrome is pituitary-dependent, with both adrenal cortices hyperplastic from ACTH excess. Adrenal tumours account for the rest; immune-mediated adrenalitis causes the opposite disease, hypoadrenocorticism.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
Pale, soft, exudative (PSE) pork is associated with:
C. Rapid post-mortem glycolysis in stress-susceptible pigs, dropping muscle pH while the carcass is warm
In pigs with the RYR1 mutation or acute pre-slaughter stress, lactic acid accumulates quickly while the carcass is warm, denaturing proteins so meat is pale, soft and watery. Chronic stress depletes glycogen and gives the opposite, dark, firm, dry (DFD) meat.
Further reading: Zachary JF, Pathologic Basis of Veterinary Disease, 7th ed.
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