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American foulbrood

animal disease

Quick Summary

American foulbrood is a serious disease affecting honeybee larvae, caused by the bacterium Paenibacillus larvae. This spore-forming bacterium is found worldwide wherever bees are kept and can impact workers, drones, and queens. The spores are highly resistant to heat and chemicals.12

Infected brood appears mottled, with a characteristic ropy or gummy texture when disturbed. The disease spreads through contaminated equipment or honey from infected colonies. Many regions require the destruction of diseased colonies by fire to prevent further spread. While other brood diseases exist, American foulbrood is considered the most severe.12

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