(A) Crippled (left) and healthy (right) bumble bees (B. terrestris). (B) RT-PCR analysis of DWV in head (h), thorax (t), and abdomen (a) of crippled and asymptomatic bumble bees (B. pascuorum) and honey bees (A. mellifera). From Genersch et al., (2005) Detection of Deformed wing virus, a honey bee viral pathogen, in bumble bees (Bombus terrestris and Bombus pascuorum) with wing deformities. Journal of Invertebrate Pathology 91>:61-63