Yes, I read the article....
No, I don't believe that the UV light "cured" the Myco-infected fish. I also didn't see anyplace that she made this claim, either.... Can you point out the specific location(s) where she claims that UV light cures an infected fish?
My interpretation is that she believes the UV light:
a) killed the Myco so her uninfected fish remained uninfected, and
b) killed off other pathogens, thereby preventing a secondary infection. And since there was no secondary infection, the fish's immune system was able to control the Myco - allowing it to remain healthy (at least for a longer than it would have been otherwise).
IMO, this is kind of like HIV leading to AIDS. It's often not the AIDS that kills the patient, it's a secondary disease that sets in when the body's immune system starts to fail. If the patient is able to avoid a secondary infection, he/she will live longer. And if the patient manages the condition, say by taking the appropriate medications, he/she will live longer too.... But the HIV infection doesn't go away. It's just that the patient lives longer, or is healthier for a longer period of time.
Myco causes a wasting disease. It gradually spreads throughout the internal organs. As the immune system fights it, the fish becomes prone to secondary infection. So if you can kill off the other pathogens, you may be able to keep the fish from getting sick with something else (and then dying as a result). But there is no way to "cure" the Myco. All you can do is minimize stressors (such as contact with other pathogens). If you do that, then the fish can probably live longer. But it's not "cured." It still has a Mycobacterial infection.
In the article, she writes: "My own experience suggests that mildly infected fish can control their disease to some extent."
(p3) And she includes a footnote that says: "In human tuberculosis, only 10% of humans infected with Mycobacterium tuberculosis ever develop TB."
By "control," I believe she means that the fish doesn't display an active infection.
But I didn't see anyplace where she says that an infected fish can cure itself. In fact, she says: "There is no cure for MB and none on the horizon. Quarantining and good fish husbandry (Table 4) are probably more effective than trying to eradicate EM, which are part of any fish’s normal environment."
She writes that she "manages" the disease. To me, this is far different from "curing" it. In the closing photo, she shows a tank that had a Myco outbreak, and writes: "All survived the 2005 MB outbreak, but some seem to have a shortened lifespan. In 2010, I euthanized two fish that had developed hunchbacks or become emaciated. Many fish that were born shortly after the 2004 outbreak continue to do well as of 2013."
So again, there is no mention of curing it, only of managing it.
I do feel it's an excellent article. I'm surprised it didn't come up in my internet searches. So thank you again for posting the link