What disease affects the gastrointestinal tract of birds leading to bloodstained mutes?

Coccidiosis is a disease that significantly impacts the gastrointestinal tract of birds. It is caused by protozoan parasites known as coccidia, which invade the intestinal lining. This invasion can lead to severe irritation and inflammation, resulting in symptoms such as diarrhea, weight loss, and, notably, bloodstained mutes (the droppings of birds).

The presence of blood in the droppings is an important indicator of this condition and can be a serious concern for avian health. In cases of coccidiosis, the blood arises from damage to the intestinal linings, reflecting the severity of the infection and the need for prompt treatment.

Other diseases listed can affect birds, but they manifest differently. Aspergillosis, for example, primarily affects the respiratory system, whereas Salmonellosis can cause systemic symptoms, but it does not typically lead to blood in the droppings as a primary sign. Gout is a metabolic disorder that leads to the deposition of uric acid crystals but does not typically present with blood in droppings either. Thus, the characteristics of coccidiosis make it clearly the disease associated with bloodstained mutes in birds.