And it's possible that when I read the later test, I did it more than the proper 15 minutes after I added the drops to the cassette. I called the provincial health line, and was told that I should consider the tests to be negative.

My wife is still doing not-very-well in hospital. At this point, the major issue seems to be that the infection -- like any other infection -- causes her chronic problems to flare up. For the most part, she's getting decent care, unlike in many other visits. Her symptoms are highly visible.