What are the clinical signs of Newcastle disease?

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Multiple Choice

What are the clinical signs of Newcastle disease?

Newcastle disease can affect multiple organ systems, so its clinical presentation often includes respiratory, digestive, and nervous signs, especially with virulent strains. Birds may show gasping or open-mouth breathing (respiratory distress), diarrhea (gastrointestinal upset), and nervous signs such as tremors, ataxia, or limb paralysis, and severe cases can even have hemorrhages in the proventriculus. Because the disease can produce this combination of signs, a statement that lists several types of clinical manifestations best reflects the typical presentation. The other options are too limited or not characteristic on their own: sneezing alone is not specific or comprehensive; feathering is not a primary clinical sign of Newcastle disease; and diarrhea alone misses the respiratory and nervous aspects that can occur.

Newcastle disease can affect multiple organ systems, so its clinical presentation often includes respiratory, digestive, and nervous signs, especially with virulent strains. Birds may show gasping or open-mouth breathing (respiratory distress), diarrhea (gastrointestinal upset), and nervous signs such as tremors, ataxia, or limb paralysis, and severe cases can even have hemorrhages in the proventriculus. Because the disease can produce this combination of signs, a statement that lists several types of clinical manifestations best reflects the typical presentation.

The other options are too limited or not characteristic on their own: sneezing alone is not specific or comprehensive; feathering is not a primary clinical sign of Newcastle disease; and diarrhea alone misses the respiratory and nervous aspects that can occur.

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