>The principle is not look particularly new. Some amateurs in the UK have been trying to do something similar since the late 90's Ron Hoskins did the same in Swindon - going through thousands upon thousands of batches of floor debris looking for the signs of damage to mites. It appeared that he was successful as his bees survive without treatment - but then Prof Stephen Martin found that there is a virulent form of DWV and a benign one. When he analysed the Swindon bees he found only the benign strain... This appears to offer an explanation as to why so-called resistant bees fail when moved to other locations. Best wishes Peter 52°14'44.44"N, 1°50'35"W *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html