As the name implies, this viral disease of chickens affects the mucous membrane of the larynx and trachea. Sometimes associated symptoms are conjunctivitis and a lesion of the nose. If the disease is not cured in time, you can lose a lot of your domestic hens. Consider laryngotracheitis in chickens, the treatment of which is so important to start on time and correctly.
Laryngotracheitis is a dangerous infectious disease that causes the activity of viruses from the herpes unit. As practice shows, it is quite stable, so after the incubation period it can be maintained for up to two years in an active state. In addition to chickens, all poultry and pigeons are sick with this disease.
Laryngotracheitis in chickens occurs in two main forms: acute and super-acute. At the same time, the acute course of the disease causes mortality in 15% of cases, whereas, as a super-acute form, in 50-60% of cases. In some animals, the disease occurs in the chronic form of manifestation.
Chickens from all domestic birds, and especially chickens at the age of 30 days - 8 months, are the most susceptible to the disease. It is important to note that a virus is also transmitted to humans if it is often in contact with infected birds. A person may be struck with a larynx and trachea, the skin of the hands, as well as bronchitis on the basis of the disease.
As for chickens, laryngotracheitis most often manifests itself during periods of unstable temperatures, off-season, with non-compliance with sanitary standards, as well as with low immunity of birds. Older and adult birds that have had a disease at an early age acquire immunity, therefore they no longer get sick. But they are carriers of the virus. The main route of infection is airborne.
Symptoms of manifestation
As we have said, laryngotracheitis occurs in chickens in two phases - acute and super-acute. The latter form often occurs suddenly in disadvantaged farms, where the disease has not previously been fixed. In this case, almost all chickens can be infected during the first day (up to 80%). The main indicator of this disease is heavy, almost impossible bird breathing. After a cough, choking, hacking. Sick birds can still wheeze for a long time, suffer from conjunctivitis, although outwardly they will look healthy.
Symptoms of hyperacute form
- asthma attacks;
- chickens shake their heads;
- coughing up with blood or other secretions;
- low mobility of birds;
- swelling of the larynx and the presence on the mucous membrane of curd;
- lack of appetite and egg-laying;
Symptoms of the acute form of the disease
Laryngotracheitis in the acute form also affects the respiratory system and is distributed in the herd in about 10 days. Mortality in these cases with proper treatment is low, does not exceed 20%. Characteristic features:
- poor appetite;
- lethargy and inactivity;
- wheezing and whistling while breathing;
- laryngeal edema;
- the presence of cheesy discharge.
In chickens, laryngotracheitis is also accompanied by a severe form of conjunctivitis. Many even lose their sight.
If laryngotracheitis is found in chickens, treatment should be carried out immediately. However, we note that a drug to combat the ailment of birds has not yet been created. Apply in practice various antibiotics that can only reduce the activity of the virus. For example, the use of biomitsin reduces overall mortality. When taking medication, laying hens must receive additional vitamins in the diet, in particular A and E.
The basic rule for laryngotracheitis is good prophylaxis, which is in proper feeding of birds, as well as in strict observance of sanitary and hygienic norms. For disinfection of the coop apply a mixture of chlorine-turpentine. Also, as a prophylaxis of the disease on large farms, special vaccines are used.