This very well could most likely be Mycoplasma Gallisepticum (MG), a respiratory disease of poultry (also known as
Chronic Respiratory Disease (CRD)), MG is one of the most common cause of respiratory diseases of poultry worldwide, with almost a 60% of backyard flocks carrying it or have been exposed to it sometime in their lives. MG is caused by a bacteria
(Mycoplasmosis/Mycobacterium) and is easily treatable with antibiotics, however, it can not be cured, making birds carriers of this bacteria. Most birds affected, may or may not ever show symptoms of the disease until they are stressed, making them asymptomatic carriers. Unfortunately, all infected birds will carry the disease regardless if they show active symptoms or not, making this disease hard to control or avoid. Birds infected with MG can spread/shed the bacteria through feces, feathers, dander, respiratory secretions and other bodily fluids (blood, saliva, etc). MG can be easily passed from bird to bird and can be passed through eggs from the infected parents, making any chicks that hatch, already infected with the bacteria and carriers of it. Fortunately, there are many antibiotics that can be used for treating the symptoms of MG, however, some may not be available without a veterinarian's approval. It is recommended to keep a closed flock and do not breed to sell hatching eggs or chicks or even older birds from your flock— meaning no birds in or out from your flock as they can carry and spread the disease.
In the end, I will always suggest getting testing done to confirm if this is or not MG as there are many other respiratory diseases that mimic MG and can to fatal with no treatments or cures available. If you're in the US, I recommend contacting your State of Agriculture veterinarian or University to get testing done. There are also online laboratories available that you can send in PCR or blood samples for, I'll list them below for you. If you choose to do testing, I suggest getting your birds tested for these respiratory diseases below:
- Mycoplasma Gallisepticum (MG) / Chronic Respiratory Disease (CRD)
- Infectious Coryza
- Infectious Laryngotracheitis Virus (ILT)
- Infectious Bronchitis Virus (IBV)
Here are the online laboratories that I mentioned above— in order to get testing done, you'll need to fill out one of their forms:
I hope this helps you out!
