Dan, FWIW the September 2005 Issue of Bee Culture has a good article by Celia Davis, Varroa Fundamentals. Within the article under THE INDIRECT EFFECTS OF THE MITE are listed four different virus types and in the next paragraph under COLONY EFFECTS, Parasitic Mite Syndrome(pages 28 and 29). Further reading at www.honeybeeworld.com and the viruses listed plus Allen's Diary should provide a fairly brief but thorough review of the viruses affecting the European honey bee. For those folks across the pond this article first appeared in Bee Craft, the official journal of the British Beekeepers Association. Cheers, Chuck Norton Norton's Nut & Honey Farm Reidsville, NC -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---