Salmonellosis - the torment of domestic chickens


Salmonellosis - it is precisely this disease of the gastrointestinal tract that so often frighten us specialists from local sanitary epidemiological stations. A person can become infected with this virus if they eat a product infected with salmonella. In acute illness, the disease can cause pneumonia and arthritis. Consider salmonellosis in chickens, symptoms of its manifestation.


Regarding knowledge about a disease like Salmonellosis, we, first of all, protect our health. After all, if our birds do not hurt, then our body will not be in danger. So, as the name implies, the causative agents of the disease are Salmonella enterobacteria. These are small, gram-negative rods that infect the gastrointestinal tract without forming spores or capsules.

View of salmonella sticks under the microscope

The ideal conditions for their life and reproduction are 37 ° C and the usual nutrient medium. However, the infection is well preserved when frozen, when heated to 80 degrees; it is resistant to some saline solutions, for example, sodium or potassium hydroxide, it carries hydrogen peroxide. Not resistant to chemical disinfectants.

In birds, including in domestic chickens, there is Salmonella gallinarum, which in humans causes food poisoning.

Symptoms of manifestation

Salmonellosis in young chicks occurs with symptoms of gastroenteritis. In adult chickens, the acute and subacute form is found. It is important to note that those chickens that have had typhoid fever remain a carrier of salmonella for life. They transmit them to the offspring through the egg.

If the bacillus enters the intestine through water and food, it first multiplies in the small intestine, then penetrates the feather follicles, lymph nodes and into the blood. Part of the virus dies under the action of the body's defenses, but if the immunity is weak, the disease progresses worse and worse due to the massive release of endotoxin.

In the locations of salmonella inflammation develops, cell necrosis. Often the infection affects the liver, intestinal mucosa, kidney, spleen. The wand can parasitize in the lungs, in the brain. In this case, the death of birds occurs most often due to exhaustion and massive hemorrhages.

Symptoms in chicks

  • weakness;
  • loss of appetite;
  • poor growth and development;
  • baldness due to poor growth of feathers;
  • dyspnea.

As a result, the majority of infected youngsters die, the survivors remain frail, underdeveloped with poor plumage.

Symptoms in adult chickens

  • blindness;
  • swelling of the tibial-heel and shoulder-elbow joints;
  • lameness;
  • pale and slanted scallops;
  • ruffled feathers;
  • reduced egg production;
  • diarrhea;
  • thirst.

Mortality ranges from 0 to 100%.

Treatment methods

Each host, taking a new bird in its kurnik, should remember that it can be a carrier of salmonella and infect all other individuals. Therefore, the "new" layer must be planted separately, make quarantine and check it for Salmonellosis. To do this, you need to bring fresh litter to the nearest laboratory. The bird should be kept in isolation until analysis results are known.

Chickens and chickens inoculate with a special syringe

For the treatment of an already manifested disease, special preparations are used, it is necessary to observe increased safety measures and hygiene, the bird is kept in isolation. Sulfa drugs, chlortetracycline and chloramphenicol help prevent the development of the disease. After a weekly course of treatment, the bird should be re-examined.

Vaccination is also used against Salmonellosis today. Chickens are vaccinated with a live vaccine, for example, Biovac. The drug is administered twice after 7 days in the pectoral muscle on 1 immunizing dose - 2 billion microbial cells. It is enough for a young chicken to develop protective antibodies, and after that, the disease no longer progressed in its severe form.




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