American Foulbrood


The most serious disease a hive can have

Spore forming

The vegetative stage infects larvae

It grows for about ten days and then turns into a spore

2.5 billion spores can exist in one (AFB) scale

It takes only about 10 spores fed to a one day old larvae for it to become infected 



Symptoms/Identification

            Irregular brood pattern (shotgun appearance)

Many cells are left open among capped brood

Perforated, sunken, sometimes greasy looking wet capped cells

Foul odor

Discolored larvae