Diseases of Honey Bees
* Caused by: Sacbrood virus (SBV) * Brood disease * Does not usually cause severe losses Sacbrood, a disease caused by a virus, does not usually cause severe losses. It is most common during the first half of the brood rearing season and often goes unnoticed, since it usually affects only a small percentage of the brood. Usually adult bees detect and remove infected larvae quickly. Often, if sacbrood is widespread enough for the beekeeper to observe the symptoms, the disease may be too severe for the adult worker population to handle.