Pasteurellosis - a complex disease of domestic chickens

Pasteurellosis is a very serious, acute infectious disease that affects all birds. Often proceeds in a chronic form. Pasteurellosis in chickens most often occurs as a result of infection from wild birds, such as rooks, sparrows, and pigeons. How to protect their chickens and chickens from this disease, let's talk in this article.


Pasteurellosis is a disease that occurs as a result of infection of a bird with a gram-negative bacterium. If you look at the pathogen under a special microscope, then its body has the shape of an oval, a static form without the formation of spores. Pasteurella have different types and different antigenic structure, which is the complexity of their treatment. In domestic chickens type A is most common according to Carter’s classification. It especially affects young animals and chickens aged 78 to 120 days.

Infection of domestic chickens may occur due to contact with wild birds, as well as already with sick individuals. In this case, the pathogen can long be in an inactive form indoors, in litter, inventory. That is why it is important to monitor the cleanliness of the coop, as well as to carry out various preventive measures.

Symptoms of manifestation

As we have said, the disease can occur in two forms. Of course, with the wrong condition of the content, as well as with poor food, pasteurellosis often occurs very acutely. In this case, the bird becomes lethargic, depressed, her appetite disappears. In the later stages, rales are heard from the lungs, the bird breathes heavily, it sits for a long time in one place, and frothy liquid can be released from the nose and mouth.

Pasteurellosis in chickens manifests itself quickly and is always accompanied by a whole set of symptoms, so it is easy to distinguish it from other infectious diseases.

Symptoms of the acute form of pasteurellosis:

  • dull and ruffled feathers;
  • gray discharge with blood;
  • frothy mucus in mouth and nose;
  • heavy breathing, wheezing;
  • lameness and lethargy;
  • body temperature up to 43 C.

With all this set of symptoms, the bird usually dies within three days. However, pasteurellosis can occur in a chronic form, for example, showing only a few signs. In this case, the chicken can hurt up to a month, after which it also dies suddenly.

Symptoms of chronic pasteurellosis:

  • inflammation of the joints of the legs;
  • darkening of the beard and ridge;
  • increase combs and earrings;
  • depression, poor appetite.

At the first symptoms of the disease, the bird should be urgently placed in a separate cage and the treatment should begin. However, owners are rarely taken for the healing of pasteurellosis, since even when taking drugs the bird often still dies.

Methods of struggle

Let us say at once that, according to the rules of the sanitary-epidemiological station and the veterinary union, it is prohibited to treat pasteurellosis in poultry, including chickens. The bird is usually destroyed in order to prevent the rest of the subsequent infection of the flock. This is due to the fact that during treatment often the disease becomes chronic and the bird is a long-term vector of infection.

However, in the first stages you can try to save the chicken with a solution of tetracycline, an aqueous solution of norsulfazole. It is best to prevent pasteurellosis, as it is quite difficult to treat it. The premises of the birds must be regularly cleaned and disinfected with lime. Feeders and drinkers should also be constantly cleaned. In poultry farms, all chickens are vaccinated, regularly give antibiotics and immunomodulatory drugs.



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