There are many types of unpleasant diseases associated with farm animals and birds. One of these is pasteurellosis in chickens. This is an infectious disease that can occur in all breeds of poultry, including chickens. The pasteurellosis virus is bacterial in origin and can destroy an entire farm.
- Pasteurellosis: why is it dangerous for poultry
- Pathogens of pasteurellosis in chickens
- Methods of infection, symptoms and forms of pasteurellosis
- Ultra-acute form of pasteurellosis
- The acute form of pasteurellosis
- The chronic form of pasteurellosis
- How to recognize pasteurellosis in chickens
- Treatment methods
- Preventive actions against pasteurellosis of the bird
Le eating sick chickens is inappropriate, since they are living carriers of the disease until death. A vaccine made on time can save you from such pestilence. But first things first.
Pasteurellosis: what is it dangerous for poultry
Pasteurellosis of birds is a viral disease that takes several forms and usually results in death. Infection can affect chickens of any age, but most often epidemics break out among young animals.
Old birds are more resistant to this disease, they are more likely to survive after pasteurellosis. However, these chickens will always remain carriers of infection and cannot live with healthy individuals.
The causative agents of pasteurellosis in chickens
Pasteurellosis (cholera) of birds is manifested due to pasteurella P. Haemolytica and P. Multocida, which are in the form of ellipsoid rods. There is no dispute; the decomposition process is isolated. Smears from internal organs and blood have a bipolar color.
The structure of P. Multocida is not uniform, therefore the vaccine is selected individually for the form of the disease. Pasteurella, the causative agent of bird pasteurellosis, can live long in frozen foods and dead animals.
Bacteria cannot survive under ultraviolet light, so the walks should be well lit . You should also treat the habitats of chickens with a 5% solution of pheanol and suspension. For this purpose, you can use a 1% solution of bleaching lime.
Methods of infection, symptoms and forms of pasteurellosis
There are several ways to infect pasteurellosis bacilli among domestic birds:
- airways and nasal cavity after contact with an infected individual;
- disturbed skin;
- food infected with bacilli;
- blood-sucking insects.
After the chickens enter the body, the virus begins to multiply in large quantities almost immediately. Bacilli spread at the site of infection, after which they attack blood and lymph.
Throughout the disease, pasteurellosis produces aggressin to better spread the infection.The incubation period usually takes several days. Tolerance depends on the vital signs of the bird and the form of the disease.
Ultra-sharp form of pasteurellosis
The chicken instantly dies without any symptoms of the disease. This is due to the high level of toxins in the bird’s body.
The appearance of the individual may be completely normal, but during the regression period the feathered bird withers quickly.
The acute form of pasteurellosis
The most common form of the disease. The chicken shows apathy, it is inactive, with wings down. The temperature can increase to 40 ° C, cyanosis appears from the lack of oxygen in the body.
Yellow discharge appears from the nasal cavity. The chicken ceases to eat food and at the same time actively drinks water. The life span of the bird in this case is from 1 to 3 days.
Chronic form of pasteurellosis
If the individual has survived the acute form, the disease becomes chronic. That is, the ailment will return again and again.
The symptoms of this form are pronounced. The bird suffers from swollen joints of the legs and wings, the beard and crest affects necrosis.
The course of chronic pasteurellosis in chickens lasts up to 3 weeks and usually ends fatally. However, if the bird has managed to recover from the disease, it becomes a lifelong carrier of the infection.
In pasturellosis, birds often bleed.During an autopsy, the following disorders can be detected: muscle tissue becomes bluish, internal organs suffer from hemorrhage, lungs become inflamed, and foci of necrosis appear throughout the body. Treatment of these birds is impossible, therefore patients with a chronic form are usually disposed of.
How to recognize pasteurellosis in chickens
In the first stages, the disease has no pronounced signs and is determined using bacteriological analysis . Analyzes are carried out only in a veterinary clinic.
The corpses of chickens who died from acute or super-acute forms of pasteurellosis are tested in laboratories. A day after sowing blood from the body, a clear growth of the culture is visible.
A smear is taken from the liver, and at the microscopic level it turns out to see the colored bipolar, characteristic of the disease. For greater certainty, an experiment is conducted on laboratory animals, which confirms or refutes the disease.
If the symptoms of infection of the bird with pasteurellosis are confirmed, it is necessary to review the conditions for keeping and feeding pets . Preventive treatment includes the use of symptomatic agents.
Doctors in such cases prescribe hyperimmune polyvalent serum and tetracycline antibiotics:
- chlortetracycline extract;
The latest developments to combat pasteurellosis among poultry are:
- suspension of cobactan;
- levoerythrocycline extract.
However, it should be remembered that an ill bird remains the carrier of infection forever, so it is more rational to let it slaughter. After detecting the disease on the farm, the sick chicken should be immediately isolated, and the pens and walking areas should be treated with disinfection solution.
It is recommended that the chicken be slaughtered during the outbreak in the chicken house because infected individuals are not suitable for divorce.
When a disease is detected, antibacterial substances should be introduced into the feeding of healthy birds:
- Chloramphenicol, 3 times a day;
- Tetracyclinum, Doxycyclin and Oxytetracyclinum, 1 time in knocking;
- Norsulfazole, 2 times a day;
- Spectam B;
If you suspect pasteurellosis, you need to act immediately. If the diagnosis is confirmed, quarantine should be introduced and prophylactic measures tightened. Only in this way is there a chance to save at least some of the birds.
Healthy individuals require compulsory vaccination. For this, an inactivated adsorbed Vaccine or Aviak in the form of an emulsion is suitable. the vaccine is dosed based on the age of the bird and will help protect the farm from the epidemic.