Clinical Findings of ILT: (merck veterinary manual)
In the acute form, gasping, coughing, rattling, and extension of the neck during inspiration are seen 5–12 days after natural exposure. Reduced productivity is a varying factor in laying flocks. Affected birds are anorectic and inactive. The mouth and beak may be bloodstained from the tracheal exudate. Mortality varies but may reach 50% in adults and is usually due to occlusion of the trachea by hemorrhage or exudate. Signs usually subside after ~2 wk, although some birds may show signs for longer periods. Strains of low virulence produce little or no mortality with mild respiratory signs and a slight decrease in egg production.
After recovery, birds remain carriers for life and become a source of infection for susceptible birds. The latent virus can be reactivated under stressful conditions. Infection also may be spread mechanically. Several epidemics have been traced to the transport of birds in contaminated crates, and the practice of litter spread in pastures is believed to be related to epidemics of the disease.
Mycoplasma Gallisepticum (MG) from Poultry DVM
The most common signs of MG infection in chickens are coughing, loud breathing noises, watery eyes, and swollen sinuses. Chickens with MG infection often show signs associated with the respiratory system, which include mild tracheitis (coughing, abnormal respiratory noses, difficulty breathing), sinusitis (facial swelling, nasal discharge), airsacculitis and conjunctivitis (eye discharge, swelling around the eyes). The facial swelling is primarily concentrated around and just below the bird's eyes. The swelling is the result of pus accumulation in the bird's sinuses located in the area under the eyes. They can sometimes be so severe, that the chicken is unable to open their eyes and see. If left without treatment, the bird can permanently lose their eyesight as a result.
See more at: http://www.poultrydvm.com/condition/mycoplasma-gallisepticum
Clinical Signs of infectious coryza from UK extension agency
Typical signs of coryza include the following:
Mortality can be as high as 50%, but 20% is more common. The disease can last as little as a few days or as long as a few months, particularly when secondary infections occur.
In the acute form, gasping, coughing, rattling, and extension of the neck during inspiration are seen 5–12 days after natural exposure. Reduced productivity is a varying factor in laying flocks. Affected birds are anorectic and inactive. The mouth and beak may be bloodstained from the tracheal exudate. Mortality varies but may reach 50% in adults and is usually due to occlusion of the trachea by hemorrhage or exudate. Signs usually subside after ~2 wk, although some birds may show signs for longer periods. Strains of low virulence produce little or no mortality with mild respiratory signs and a slight decrease in egg production.
After recovery, birds remain carriers for life and become a source of infection for susceptible birds. The latent virus can be reactivated under stressful conditions. Infection also may be spread mechanically. Several epidemics have been traced to the transport of birds in contaminated crates, and the practice of litter spread in pastures is believed to be related to epidemics of the disease.
Mycoplasma Gallisepticum (MG) from Poultry DVM
The most common signs of MG infection in chickens are coughing, loud breathing noises, watery eyes, and swollen sinuses. Chickens with MG infection often show signs associated with the respiratory system, which include mild tracheitis (coughing, abnormal respiratory noses, difficulty breathing), sinusitis (facial swelling, nasal discharge), airsacculitis and conjunctivitis (eye discharge, swelling around the eyes). The facial swelling is primarily concentrated around and just below the bird's eyes. The swelling is the result of pus accumulation in the bird's sinuses located in the area under the eyes. They can sometimes be so severe, that the chicken is unable to open their eyes and see. If left without treatment, the bird can permanently lose their eyesight as a result.
See more at: http://www.poultrydvm.com/condition/mycoplasma-gallisepticum
Clinical Signs of infectious coryza from UK extension agency
Typical signs of coryza include the following:
- Swelling around the face
- Foul-smelling, thick and sticky discharge from the nostrils and eyes
- Labored breathing
- Rales
Mortality can be as high as 50%, but 20% is more common. The disease can last as little as a few days or as long as a few months, particularly when secondary infections occur.
