INAPPARENT INFECTION OF ACUTE PARALYSIS VIRUS AND KASHMIR BEE VIRUS IN THE US HONEY-BEES

Study with Varroa-free colonies and colonies with varying degree of Va rroa infestations showed that acute paralysis virus (APV) and Kashmir bee virus (KBV) persisted as inapparent infection in Maryland honey be es. The inapparent infection of these two viruses could be activated a nd replicated to detectable concentrations by the injection of potassi um phosphate buffer, or by the infestation of Varroa, However, the tra nsmission of APV and KBV did not require Varroa. This study also showe d that some bees did not carry inapparent APV/KBV infection.