What are the symptoms of laying hen respiratory disease?

The common clinical diseases that endanger chicken respiratory tract include chicken infectious rhinitis, chicken infectious bronchitis, chicken infectious laryngotracheitis, Newcastle disease, avian aspergillosis, and chicken chronic respiratory disease caused by mycoplasma infection. It can cause respiratory symptoms in chickens, and clinical symptoms should be noted. The symptoms of various laying hen respiratory diseases are as follows:

1. Symptoms of infectious rhinitis: This disease is an acute respiratory disease of chicken caused by Haemophilus paragallinarum. The clinical symptom is swelling of the face. The symptoms such as runny nose and tearing are similar to those of the chronic respiratory tract, but usually, there is no obvious balloon lesion and respiratory rales. Chicken infectious rhinitis and mycoplasma disease not only have similar symptoms, but are also easy to be misdiagnosed, and often have mixed infections. However, streptomycin and doxycycline have good effects on these two diseases, and these drugs should be used when a reliable differential diagnosis cannot be made...

2. Symptoms of infectious bronchitis: chicken infectious bronchitis is an acute and highly contagious respiratory infectious disease of chickens caused by infectious bronchitis virus, clinical manifestations of acute onset of flocks, characteristic lesions of fallopian tubes, adult chickens Egg production has dropped significantly and severely deformed eggs have appeared, and all antibacterial drugs have no direct effect, which can be distinguished from chronic respiratory disease. But chicken infectious bronchitis and chronic respiratory disease induce each other, which is easy to cause mixed infection. Sulfa drugs should not be used when selecting drugs for infectious bronchitis in laying hens, because such drugs will not only further affect egg production but also have no effect on mycoplasma disease.

3. Symptoms of infectious laryngotracheitis: Chicken infectious laryngotracheitis is an acute, contagious upper respiratory tract infection caused by infectious laryngotracheitis virus. It is characterized by difficulty breathing, coughing and coughing up blood-containing exudates. During necropsy, swelling, bleeding, and erosion of the larynx and tracheal mucosa can be seen. Acute onset of chickens in the whole group, severe breathing difficulties cough up bloody mucus and soon died. Various antibacterial drugs have no direct effect. These can be related to other respiratory tracts. The disease is different.

4. Symptoms of Newcastle disease: Newcastle disease is a highly contagious disease caused by a paramyxovirus. Also known as Asian chicken fever or pseudo chicken fever. The symptoms of the disease are acute in the whole group of chickens, and the symptoms are obvious, but the digestive tract is severely bleeding, and the head and neck are twisted, the staring of the head is staring, and the lameness and other neurological symptoms. Newcastle disease of chickens can induce mycoplasma disease, and its serious diseases can mask other respiratory diseases, especially mycoplasma disease, and the symptoms of mycoplasma disease gradually show after the symptoms of Newcastle disease of chickens disappear. HSBC's comprehensive medication plan: Plague Kangsan + Huzhining

5. Symptoms of avian aspergillosis: Avian aspergillosis is a variety of avian fungal diseases caused by aspergillus in the fungus, mainly affecting the respiratory organs. All kinds of birds are susceptible, but young birds are common and acute and mass outbreaks are common. The morbidity and mortality are relatively high. Adult birds are mostly sporadic. The disease is characterized by inflammation of the lungs and air sacs and the formation of granuloma. The size of the millet is mainly grey or yellow nodules, which must be distinguished from Mycoplasma gallisepticum. Besides, nodules are occasionally found in tissues such as eyes, liver, and brain, so they are also called aspergillus pneumonia.

6. Symptoms of Mycoplasma gallisepticum: Mycoplasma gallisepticum is a contagious chronic respiratory disease of chicken caused by Mycoplasma gallisepticum. After the onset of disease, the sick chickens first shed serious or viscous nasal fluid and squirted their nose. When the inflammation continues to develop, they cough and have difficulty breathing. Breathing rales can be heard. In the later period, a large amount of exudate accumulates in the nasal cavity and suborbital sinus, and eyes The face is swollen and the eyes are prominent. The nasal cavity, trachea, bronchus, and air sacs contained mucous exudates during the necropsy. The characteristic lesions were body air sacs, especially chest air sacs, with varying degrees of turbidity, thickening, and oedema. A large number of air sacs varied in size as the disease progressed. Caseous hyperplastic nodules, rosary-like in appearance, a few are as large as eggs, and some have lung lesions. In chronic cases, there are yellow exudates in the eyes of sick chickens, and grey-yellow tofu-like substances in the conjunctiva. Clinically, it should be distinguished from other respiratory diseases.