Most Common Poultry Diseases

Domestic poultry are constantly on the line of disease that can spread at great speed if they live in colonies. For this reason it is convenient the correct vaccination of the birds against the most common diseases in poultry.

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On the other hand, the hygiene of the premises is fundamental to combat diseases and parasites. Strict veterinary control is absolutely necessary to deal with a possible outbreak of a disease.

In this article from YourCatCareguide we show you the main diseases most common in poultry , keep reading and let us know!

It may also interest you: Most common diseases in rabbits

Infectious bronchitis

The infectious bronchitis is caused by a coronavirus that affects only hens and chickens. Respiratory disorders (wheezing, hoarseness), nasal discharge, and watery eyes are the main symptoms. It spreads through the air and completes its cycle in 10-15 days.

This common disease in poultry can be prevented through vaccines – otherwise it is difficult to attack this disease.

Avian cholera

The fowl cholera is a highly contagious disease that attacks many species of birds. A bacterium ( Pasteurella multocida ) is the cause of this disease.

The sudden death of birds apparently healthy is the characteristic of this serious disease. Another symptom is that birds stop eating and drinking. Pathology is transmitted through contact between sick and healthy birds. The outbreak appears between 4 and 9 days after contracting the disease.

Disinfection of facilities and equipment is essential is absolutely necessary. As well as treatment with sulfas and bacterins. The corpses should be removed immediately to prevent other birds from biking and getting infected.

Infectious coryza

The infectious coryza is produced by the bacterium Haemophilus gallinarum. The symptoms are a sneezing and an exudation in the eyes and nasal sinuses, which solidifies and can cope with the loss of the eyes of the bird. The disease is transmitted through the airborne dust, or through contact between diseased and healthy birds. It is recommended to use antibiotics in the water.

Avian encephalomyelitis

The encephalomyelitis bird is caused by a picornavirus. It mainly attacks young specimens (1 to 3 weeks) and is also part of the most common diseases in poultry.

Rapid body tremors, faltering gait, and progressive paralysis are the most obvious symptoms. There is no cure and sacrifice of infected specimens is recommended. The eggs of the vaccinated specimens immunize offspring, hence the importance of prevention through vaccines. On the other hand, infected feces and eggs are the main vector of contagion.


The bursitis is a disease produced by a birnaviruses. Respiratory noise, bruised feathers, diarrhea, tremors and decay are the main symptoms. Mortality does not usually exceed 10%.

It is a common disease in very contagious poultry that is transmitted by direct contact. No cure is known, but the vaccinated birds are immune and transmit their immunity through their eggs.

Avian Influenza

The avian influenza is caused by a virus of the family Orthomyxovridae . This severe and contagious disease produces the following symptoms: bruised feathers, inflamed crests and jowls and edema in the eyes. Mortality is close to 100%.

It is believed that migratory birds are the main infection vector. However, there are vaccines that decrease the mortality of the disease and help prevent it. With the disease already contracted, treatment with amadantine hydrochloride is beneficial.

Marek’s disease

The Marek’s disease , one of the most common diseases in poultry, is caused by a herpes virus. A progressive paralysis in the legs and wings is a clear symptoms. Tumors also occur in the liver, ovaries, lungs, eyes, and other organs. Mortality is 50% in unvaccinated birds. The disease is transmitted by dust encrusted in the follicles of the infested bird.

Chicks should be vaccinated on the first day of life. The premises must be disinfected scrupulously if they have been in contact with sick birds.

Newcastle Disease

The Newcastle disease is caused by a very contagious paramyxovirus. A wheezing, coughing, wheezing, crackling, and breathing difficulties are followed by strange head movements (hide head between paws and shoulders), and an anomalous gait behind.

Bird sneezing and droppings are the vector of contagion. There is no effective treatment against this disease so common in birds. A cyclical vaccine is the only remedy to immunize poultry.

Avian pox or Avian Bouba

The fowlpox is produced by the virus Borreliota avium . This disease has two forms of manifestation: wet and dry. The wet causes ulcers in the mucous membranes of the throat, tongue and mouth. Drought produces crusts and blackheads on the face, ridge and jowls.

The vector of transmission are mosquitoes and living with infected animals. Only vaccines can immunize birds, since there is no effective treatment.

This article is purely informative, in we do not have the capacity to prescribe veterinary treatments nor to make any type of diagnosis. We suggest you bring your pet to the veterinarian in case of any type of condition or malaise.

If you want to read more articles like the most common diseases in poultry , we recommend you to join our section Prevention .

Emily Harris

Hi Guys, Girls, and Cats:-p I am Emily Harris, and you can see in above pic. She loves me I swear. I saved her from a dumpster a few weeks back.

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