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Black queen cell virus (BQCV) is a virus that affects honeybees. It is a member of the Densovirus genus and is known to cause significant damage to bee colonies. BQCV can lead to the development of queen cells, which are structures where new queens are raised. If these cells are infected, the developing queen can be deformed or die, impacting the colony's ability to reproduce and thrive. The virus can weaken the colony, making it more susceptible to other diseases and stressors, and can contribute to colony collapse disorder.12

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