What is a true symptom of aspergillosis?

Weight loss is a true symptom of aspergillosis, which is a fungal infection that primarily affects the respiratory system of birds. This condition can lead to decreased appetite and overall health deterioration, resulting in weight loss. As the infection progresses, the bird's ability to absorb nutrients effectively diminishes, contributing to further weight reduction.

In addition to weight loss, birds suffering from aspergillosis often exhibit respiratory distress, lethargy, and changes in behavior, but weight loss is a key indicator due to the associated anorexia and illness. Recognizing this symptom is crucial for early diagnosis and treatment, as timely intervention can significantly improve the chances of recovery.