this resource (which I find quite useful) https://www.nadis.org.uk/disease-a-z/poultry/diseases-of-farmyard-poultry/part-1-mycoplasmosis/When I was young enough to be learning these things we learned that mycoplasma was a separate type of thing. Different from bacteria.
These days I believe it is classified as a genus of bacterium lacking a cell wall.
In chickens it is responsive to antibiotics, though they do not typically achieve a cure.
As a teenager I had a thing about mycoplasma - they are quite beautiful. I still have a book of mycoplasma photographs that I have kept all these decades!
Tax: Eli slaughtering a stir fried shrimp tail
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says antibiotics can 'reduce incidence to a tolerable level' if given early and to young stock, and probably have their impact on the other pathogens which the affected bird is likely to be carrying (para 1).
Eli looks stunning!