What is the primary cause of American Foulbrood (AFB) in bee colonies?

Study for the Texas Master Beekeeper Exam. Prepare with flashcards and multiple-choice questions, each with hints and explanations. Get ready for your exam!

The primary cause of American Foulbrood (AFB) in bee colonies is the bacterium Paenibacillus larvae. This pathogen specifically targets the larvae of honeybees, leading to severe infestations and mortality among developing bees. When the spores of Paenibacillus larvae enter the hive, they can infect the larvae, causing them to die and eventually decompose within their cells. This decomposition produces a characteristic foul odor and brown, sticky residue, which are key indicators of the infection.

The bacterium’s spores are highly resilient and can survive for a long time outside of hosts, making AFB particularly difficult to eradicate once it has established itself in a colony. Understanding that AFB is primarily caused by this bacterium is crucial for beekeepers so they can implement effective management practices aimed at prevention and control of the disease.

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