Arne,
Unfortunately, too many people are of the opinion that Terramycin KILLS AFB
disease, which of course, is TOTALLY FALSE.

Terramycin only masks (hides) the disease and prevents the death of the bee
as long as the colony receives 2-3 treatments of Terra. every year.  However,
the bees are still infected with the AFB disease.

A great almost identical situation among humans is the use of insulin to
control
Type 1 diabetes.  A diabetic may live to a "ripe old age" and do great things
during their life span provided they get their shot of insulin EACH DAY and
never miss.  However, if they stop taking their insulin, they are soon dead,
because the insulin
only "controlled" the diabetic symptoms, but does not CURE diabetes.

I hope I have helped.

George Imirie
Certified EAS Master Beekeeper
Ending my 70th year of beekeeping near Washington DC