Question

'Cud dropping' condition may be found in cattle in:

• A. Pharyngeal paralysis
• B. Esophageal obstruction
• C. Pharyngitis
• D. Fever

Hint:

Associate "Cud dropping" directly with neuromuscular dysfunction of the swallowing apparatus.
Pharyngeal paralysis is the classic cause, and it should always raise suspicion of systemic neurological diseases like Botulism or Listeriosis in cattle.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Cud dropping refers to the clinical sign where semi-masticated ruminate (the "cud") falls out of the animal's mouth during mastication because of a failure in the normal swallowing reflex.

Step 2: Detailed Explanation:
Let us evaluate each condition:
- Pharyngeal paralysis: This condition is caused by damage to the cranial nerves (IX, X, and XI) supplying the pharyngeal muscles, commonly seen in botulism, rabies, or listeriosis.
Because the muscles responsible for swallowing are paralyzed, the animal can masticate the regurgitated bolus but cannot swallow it.
This results in the bolus falling from the mouth, known as "cud dropping".
- Esophageal obstruction (Choke): This presents as an inability to swallow, resulting in regurgitation, bloat, and drooling, but not specifically the selective "cud dropping" during mastication.
- Pharyngitis: Inflammation of the pharynx causes pain during swallowing (dysphagia), but the nervous swallowing reflex remains intact, so the animal generally avoids eating rather than dropping cud.
- Fever: Fever is a systemic inflammatory response that causes anorexia (loss of appetite), but does not directly cause localized motor paralysis of the swallowing apparatus.

Step 3: Final Answer:
Therefore, the "cud dropping" condition is specifically associated with pharyngeal paralysis.