Respiratory diseases in chickens significantly impact poultry health and productivity, resulting in high mortality and considerable economic losses. These conditions are triggered by a variety of infectious agents, including viruses, bacteria, and fungi, as well as by environmental stressors. This article discusses the most prevalent respiratory diseases in poultry—such as Infectious Bronchitis, Newcastle Disease, Avian Influenza, Mycoplasmosis, and Infectious Coryza—highlighting their causes, clinical signs, diagnostic methods, and control measures. Emphasis is placed on integrated disease management approaches, including vaccination, biosecurity, environmental regulation, and nutritional support, aiming to mitigate disease spread and improve flock resilience and productivity in poultry farms.
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