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The bees cannot fly, and often crawl on the ground and up plant stems. In some cases, the crawling bees can be found in large numbers (1000+). The bees huddle together on the top of the cluster or on the top bars of the hive. They may have bloated abdomens due to distension of the honey sac. The wings are partially spread or dislocated.
Honey bees at a hive entrance: one is about to land and another is fanning. Colony collapse disorder (CCD) is an abnormal phenomenon that occurs when the majority of worker bees in a honey bee colony disappear, leaving behind a queen, plenty of food, and a few nurse bees to care for the remaining immature bees. [1]
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Varroa destructor, the Varroa mite, is an external parasitic mite that attacks and feeds on honey bees and is one of the most damaging honey bee pests in the world. [2] [3] A significant mite infestation leads to the death of a honey bee colony, usually in the late autumn through early spring.
Bees infected with CBPV begin to show symptoms after 5 days and die a few days after. [1] Chronic bee paralysis virus infection is a factor that can contribute to or cause the sudden collapse of honeybee colonies. [2] Since honeybees serve a vital role in ecological resilience, it is important to understand factors and diseases that threaten them.
It causes nosemosis, also called nosema, which is the most common and widespread of adult honey bee diseases. [1] The dormant stage of N. apis is a long-lived spore which is resistant to temperature extremes and dehydration, and cannot be killed by freezing the contaminated comb.
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Deformed wing virus (DWV) is a positive-strand [1] RNA virus, one of 22 known viruses affecting honey bees.While most commonly infecting the honey bee, Apis mellifera, it has also been documented in other bee species, like Bombus terrestris, [2] thus, indicating it may have a wider host specificity than previously anticipated.