Chicken Diseases

Mycoplasma gallisepticum (MG) is one of the most common and difficult respiratory diseases in chickens, causing coughing, swollen sinuses, breathing problems, lower egg production, and long-term weakness in infected flocks. Many poultry owners simply call it “MG” or chronic respiratory disease because once it enters a flock, it tends to stay there for a very …

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Marek’s Disease is one of the most contagious viral diseases in chickens and can cause paralysis, tumors, blindness, severe weight loss, and sudden death, especially in young birds. For many chicken owners, Marek’s Disease is one of the most feared flock diseases because it spreads quietly and stays in the environment for a very long …

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Lymphoid Leukosis (LL) is one of the most common cancer-related diseases in adult chickens and is caused by the Avian Leukosis Virus (ALV), a contagious retrovirus that attacks the bird’s immune system and internal organs. Many backyard chicken owners do not notice the disease right away because infected birds often appear normal during the early …

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Infectious Coryza is one of the most common bacterial respiratory diseases that affects chickens around the world. Poultry raisers usually notice it first when birds start sneezing, developing swollen faces, or having a bad-smelling discharge coming from the nose and eyes. It spreads fast inside crowded flocks and can quickly affect both backyard chickens and …

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Newcastle disease is one of the most feared viral diseases in poultry farming. It spreads extremely fast, attacks the respiratory and nervous systems, and can wipe out an entire flock within days if not controlled immediately. Many backyard chicken keepers first notice something strange when a bird starts coughing, walking in circles, or twisting its …

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Aspergillosis in chickens is a serious respiratory fungal infection caused by Aspergillus species. This fungus is commonly found in soil, decaying organic matter, and contaminated feed, and can survive both outdoors and inside poultry housing environments such as chicken coops and hatcheries. Although aspergillosis can affect various bird species, including chickens and turkeys, it is …

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Bumblefoot in chickens (scientific name: ulcerative pododermatitis) is a bacterial foot infection that causes inflammation in poultry and can affect chickens, ducks, quails, and other domestic birds. It is most commonly seen in backyard chickens and commercial flocks where foot injuries are frequent. This condition is primarily caused by Staphylococcus bacteria, which enter the body …

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Erysipelas in chickens is a serious bacterial infection caused by Erysipelothrix rhusiopathiae, a pathogen commonly found in soil, organic matter, and contaminated environments. While it is more frequently associated with pigs and turkeys, chickens can also become infected, leading to significant health and economic losses in poultry farming. This disease typically enters the body through …

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Fowl cholera in chickens is a highly contagious and often fatal bacterial disease affecting poultry and wild birds, including chickens, turkeys, and waterfowl. It is caused by the bacterium Pasteurella multocida and is also known as avian cholera. This disease has been documented worldwide for over 200 years and remains a significant threat to poultry …

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Coccidiosis is a common and highly contagious intestinal disease in chickens caused by the protozoan parasite Coccidia. It spreads rapidly through flocks via direct contact and ingestion of contaminated feces, often affecting multiple birds in a very short time. This disease primarily targets the intestinal tract, causing tissue damage, internal bleeding, and poor nutrient absorption, …

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