It's in the archives!
http://listserv.albany.edu:8080/archives/bee-l.html
The USDA-Beltsville lab will test comb for American Foulbrood. Send a piece
of suspect brood comb about 3" x 5" to:
U. S. Department of Agriculture
Bee Research Laboratory
Building 476, BARC-East
Beltsville, MD 20705
Aaron Morris - thinking SEARCH THE ARCHIVES!!!