1.1.8. Cloudy wing virus

The symptoms for cloudy wing virus (CWV) consist of opaque wings of severely infected adult bees, with lower titres resulting in asymptomatic infected bees (Bailey et al., 1980; Bailey and Ball, 1991; Carreck et al., 2010). It cannot be propagated in larvae or pupae. It has an unpredictable incidence, no regular associations with other pathogens or pests. Like chronic bee paralysis satellite virus it has a small particle and very small genome, but they are serologically unrelated and their single capsid proteins are of different size (Table 1; Bailey et al., 1980).