European Foulbrood (EFB)

Worker cleaning her proboscis.

EFB is often found when nectar flows are sporadic or there is an insufficient number of nurse bees to attend brood. How does EFB spread? European Foulbrood (Melissococcus plutonius) is transmitted when the bacteria become mixed with the bee bread, … Continue reading

BQCV (Black Queen Cell Virus)

BQCV in a queen cell.

So what is a virus? A virus is an infectious agent that parasitizes a host cell to replicate. Viruses can cause clinical symptoms, larvae death, or no symptoms at all. BQCV is caused by a virus in the family Dicistroviridae. … Continue reading

Sacbrood Virus (SBV)

SBV or Sacbrood Virus (Morator aetatulas) often appears during spring or colony buildup and causes larval death. The pupa fails to pupate and has a “shrunken head” appearance. When you see perforations in the sealed brood with the infected larvae … Continue reading

American Foulbrood (AFB)

AFB: Symptoms in open brood.

How does AFB spread? American Foulbrood (Paenibacillus larvae) is introduced to the hive by drifting bees from nearby colonies, infected equipment/tools, beekeepers and robbing. The infection begins when spores enter the hive, and then food contaminated by spores is fed … Continue reading

Parasitic Mite Syndrome (PMS)

PMS or Parasitic Mite Syndrome is a condition that causes a honey bee colony to deteriorate and eventually dwindle away and die. There has not yet been a pathogen detected which causes the brood symptoms that appear with this syndrome. … Continue reading

Neglected Drone Brood

Throughout the year several honey bee diseases can be noted in stressed or sick colonies. There are also other stress factors that cause colony conditions to deteriorate and look very similar to sick or diseased colonies. One condition is neglected … Continue reading