Paenibacillus pulvifaciens (Nakamura, 1984) Ash et al., 1994
Paenibacillus larvae pulvifaciens (Nakamura, 1984) Heyndrickx et al., 1996
Paenibacillus larvae larvae (White, 1906) Ash et al., 1994 emend. Heyndrickx et al., 1996
Paenibacillus larvae is a species of bacterium, found worldwide, which causes American foulbrood, a fatal disease of the larvae of honeybees (Apis mellifera). It is a Gram-positive, rod-shaped bacterium,[2] which forms spores which can remain viable for at least thirty-five years.[3]