Question:
Which of the following conditions are associated with Spirocerca lupi infection in dogs?
A. Stenosis due to scarring of the internal wall of aorta
B. Oesophageal granuloma
C. Spondylosis of the thoracic vertebrae
D. Invasion of larvae in the eye leading to nodular thickenings and ulceration
Choose the correct answer from the options given below.
Which of the following conditions are associated with Spirocerca lupi infection in dogs?
A. Stenosis due to scarring of the internal wall of aorta
B. Oesophageal granuloma
C. Spondylosis of the thoracic vertebrae
D. Invasion of larvae in the eye leading to nodular thickenings and ulceration
Choose the correct answer from the options given below.
A. Stenosis due to scarring of the internal wall of aorta
B. Oesophageal granuloma
C. Spondylosis of the thoracic vertebrae
D. Invasion of larvae in the eye leading to nodular thickenings and ulceration
Choose the correct answer from the options given below.
Show Hint
Remember the classic triad of canine spirocercosis: Aortic scarring, Oesophageal granuloma, and Thoracic spondylosis. These three lesions are highly characteristic and frequently tested in veterinary parasitology.
Updated On: Aug 24, 2026
- A, B and D only
- A, B and C only
- B, C and D only
- A and B only
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Spirocerca lupi is a pathogenic nematode of dogs that migrates through the thoracic aorta before reaching the oesophagus.
Its migration and adult stages produce characteristic lesions involving the aorta, oesophagus, and adjacent thoracic vertebrae.
Detailed Explanation:
Statement A: Stenosis due to scarring of the internal wall of aorta
Larval migration through the thoracic aorta causes arteritis, fibrosis, and scarring of the aortic wall.
These changes may result in narrowing (stenosis) and weakening of the vessel.
Hence, Statement A is true.
Statement B: Oesophageal granuloma
Adult worms reside within nodules in the oesophageal wall, producing characteristic oesophageal granulomas.
These granulomas may later undergo malignant transformation into fibrosarcoma or osteosarcoma.
Therefore, Statement B is true.
Statement C: Spondylosis of the thoracic vertebrae
Chronic inflammation adjacent to the oesophagus commonly induces periosteal new bone formation and spondylosis of the thoracic vertebrae.
This is a well-recognized radiographic finding in canine spirocercosis.
Thus, Statement C is true.
Statement D: Invasion of larvae in the eye
Ocular nodules and ulceration are not characteristic lesions of Spirocerca lupi.
Its principal predilection sites are the thoracic aorta and oesophagus rather than the eye.
Hence, Statement D is false.
Step 2: Final Answer:
The conditions associated with Spirocerca lupi infection are A, B and C only.
\[ \boxed{(B) A, B and C only \]
Spirocerca lupi is a pathogenic nematode of dogs that migrates through the thoracic aorta before reaching the oesophagus.
Its migration and adult stages produce characteristic lesions involving the aorta, oesophagus, and adjacent thoracic vertebrae.
Detailed Explanation:
Statement A: Stenosis due to scarring of the internal wall of aorta
Larval migration through the thoracic aorta causes arteritis, fibrosis, and scarring of the aortic wall.
These changes may result in narrowing (stenosis) and weakening of the vessel.
Hence, Statement A is true.
Statement B: Oesophageal granuloma
Adult worms reside within nodules in the oesophageal wall, producing characteristic oesophageal granulomas.
These granulomas may later undergo malignant transformation into fibrosarcoma or osteosarcoma.
Therefore, Statement B is true.
Statement C: Spondylosis of the thoracic vertebrae
Chronic inflammation adjacent to the oesophagus commonly induces periosteal new bone formation and spondylosis of the thoracic vertebrae.
This is a well-recognized radiographic finding in canine spirocercosis.
Thus, Statement C is true.
Statement D: Invasion of larvae in the eye
Ocular nodules and ulceration are not characteristic lesions of Spirocerca lupi.
Its principal predilection sites are the thoracic aorta and oesophagus rather than the eye.
Hence, Statement D is false.
Step 2: Final Answer:
The conditions associated with Spirocerca lupi infection are A, B and C only.
\[ \boxed{(B) A, B and C only \]
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