Interestingly, following today's meeting, discussion on AFB and having borrowed a book which mentioned new at home test kits for AFB ,I found a video for it on on YouTube;
"How to use Vita Diagnostic Test Kit for American Foulbrood "
There seem to be a couple of on line sites that sell it in Australia but this one seems about 1/4 of the price of the other I came across;
Apparently, while you can use the kit only once,you can put several samples of larvae into it at the same time.
They are supposed to be as accurate as lab tests. As always, I suppose that depends on the user too.