Colony Collapse: The sudden collapse and disappearance or diminution of a colony of organisms.Varroidae: A family of MITES in the subclass ACARI. It includes the single genus Varroa.Bees: Insect members of the superfamily Apoidea, found almost everywhere, particularly on flowers. About 3500 species occur in North America. They differ from most WASPS in that their young are fed honey and pollen rather than animal food.Nosema: A genus of parasitic FUNGI in the family Nosematidae. Some species are pathogenic for invertebrates of economic importance while others are being researched for possible roles in controlling pest INSECTS. They are also pathogenic in humans.Dicistroviridae: A family of invertebrate RNA viruses in the order Picornavirales.