HUKIT
Aquarium Advice Addict
I found it on here under tank compatibility, don't know if it's accurate though:
Symphysodon aequifasciatus - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki
I'm gonna go ahead and call BS with this claim, certain species of gouramis like Colista seem to be more prone to bacterial infections but not producing one.