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USDA ARS
American foulbrood
Paenibacillus larvae larvae

American foulbrood (Paenibacillus larvae larvae) is a bacterial pathogen of Bees. It was first detected in Vermont in 1986.

This ia a severe highly infectious bacterial disease which affects the honeybee, causing larvae to darken and die. Honey bee larvae infected with American foulbrood become a stringy mass of material that later dries and carries the spores that may infect other larvae.

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