Israeli Acute Paralysis Virus (IAPV)
IAPV was first identified in 2004. It is a member of the dicistroviridae family and has many similarities with Acute Bee Paralysis Virus and Kashmir Bee Virus. It can be found in the haemolymph, brain, fat body, salivary gland, hypopharyngeal gland, gut, nerve, trachea and muscle of the bee (Chen et al 2014).

It commonly exists covertly in a colony. A theory is that horizontal transmission of the virus between crowded live bees is via the cytoplasm of broken cuticular hairs. Vertical transmission is possible through feeding of larvae.

The clinical signs of the virus are shivering wings and progressive paralysis leading to death.

In 2007 it was postulated that IAPV was responsible for "colony collapse disorder" (CCD). It is now thought that no one thing is responsible for CCD but IAPV may have been a contributing factor.

IAPV has not been seen in the UK.
Israeli Acute Paralysis Virus: Epidemiology, Pathogenesis and Implications for Honey Bee Health
Scientific Beekeeping