Chronic bee paralysis

Definition

A contagious viral disease of adult honey bees (Apis mellifera) caused by Chronic bee paralysis virus (CBPV), characterized by trembling, flightlessness, and progressive paralysis leading to death. The disease presents in two forms: the classic 'black robber' syndrome with dark, hairless, shiny abdomens and greasy appearance, or the 'hairless-black' syndrome with patchy hair loss and darkened cuticle. Transmission occurs through direct contact, contaminated food, and possibly Varroa mite vectors. Unlike acute viral infections such as sacbrood or acute bee paralysis, CBPV persists in colonies at low levels but can erupt during stress periods, causing significant colony losses in apiaries worldwide.

Etymology

From Greek 'khronos' (time, long duration) + 'paralysis' (loss of motor function); reflects the protracted, progressive nature of the disease compared to rapid-acting viral infections.

Example

During a late-summer nectar dearth, a beekeeper observes trembling bees crawling at the hive entrance, unable to fly, with abdomens that appear greasy and blackened—classic signs of chronic bee paralysis triggering colony collapse before winter.

Synonyms

• CBP
• Chronic paralysis disease

Related Terms

• Acute bee paralysis virus
• Deformed wing virus
• Varroa destructor
• Sacbrood virus
• Nosema ceranae
• Colony collapse disorder
• Viral load
• Apiary hygiene

Usage Notes

Distinguish from Acute bee paralysis virus (ABPV), which causes rapid death; CBPV has a slower course and different symptom profile. The term refers to the disease syndrome, not the virus itself (CBPV). Field diagnosis requires laboratory confirmation via RT-PCR or electron microscopy due to symptom overlap with pesticide poisoning and other stressors. The 'chronic' designation reflects epidemiological pattern rather than individual disease duration in a single bee.