Fever in honeybee colonies.

Area of Science:

• Animal Behavior
• Insect Pathology
• Social Immunity

Background:

• Honeybees (Apis spp.) regulate nest temperature for brood development and defense.
• Elevated nest temperatures are crucial for honeybee colony health and survival.
• Colonial thermoregulation plays a key role in honeybee social immunity.

Purpose of the Study:

• To investigate the defensive role of elevated nest temperature in honeybees against pathogens.
• To determine if honeybees exhibit a fever response to colonial infection.
• To explore the mechanisms and implications of honeybee brood-comb fever.

Main Methods:

• Observing honeybee colony responses to infection by Ascosphaera apis.
• Monitoring nest temperatures during pathogen exposure.
• Analyzing the timing of temperature increase relative to larval mortality.

Main Results:

• Honeybees generate a "brood-comb fever" in response to Ascosphaera apis infection.
• This fever response is initiated before visible symptoms or larval death.
• The findings suggest early pathogen detection or larval signaling.

Conclusions:

• Honeybee nest thermoregulation serves an additional defensive function against specific pathogens.
• Brood-comb fever represents a sophisticated form of collective immunity in honeybees.
• This phenomenon is a compelling instance of convergent evolution with fever responses in other animals.