Diseases of The Honey Bee - Bacterial Diseases

Bacterial Diseases

Symptoms
Appearance of brood comb Age of dead brood Color of dead brood Consistency of dead brood Odor of dead brood Scale characteristics Infectious agent
Sealed brood. Discolored, sunken, or punctured cappings. Usually older sealed larvae or young pupae. Lying lengthwise in cells. Dull white, becoming light brown, coffee brown to dark brown, or almost black. Soft, becoming sticky to ropy. Slightly to pronounced putrid odor. Lies uniformly flat on lower side of cell. Adheres tightly to cell wall. Fine, threadlike tongue of dead maybe present. Head lies flat. Black in color. American Foulbrood
Unsealed brood. Some sealed brood in advanced cases with discolored, sunken or punctured cappings. Usually young unsealed larvae; occasionally older sealed larvae. Typically in coiled stage. Dull white, becoming yellowish white to brown, dark brown, or almost black. Watery; rarely sticky or ropy. Granular. Slightly to penetrating sour. Usually twisted in cell. Does not adhere to cell wall. Rubbery. Black in color. European foulbrood

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