This makes me wonder > about virus resistance; has any work been done on possible variations in > susceptibility? Hi Robert Ilam Sela documented bee resistance to IAPV, others have demonstrated that some mites are resistant to DWV, and do not transmit it to bees. I haven't heard of anyone doing specific breeding work, but I will be discussing this with certain breeder/researchers next week. Randy Oliver ****************************************************** * Full guidelines for BEE-L posting are at: * * http://www.honeybeeworld.com/bee-l/guidelines.htm * ******************************************************