Honey Bee Health and Microbiome Dynamics

Honey bee health hinges on a finely tuned interplay between the insect host, its diverse gut microbiota and a suite of environmental stressors. The honey bee gut harbours a core consortium of bacterial symbionts that contribute to digestion, nutrient assimilation and immune modulation. Disruption of this community through pesticides, antibiotics or nutritional deficiency can lead to dysbiosis, compromise disease resistance and increase susceptibility to parasites and viruses. Ectoparasitic mites not only inflict direct physical damage but also alter the microbial landscape of bees, facilitating viral amplification and immune suppression. Equally, behavioural shifts—such as the transition from hive-bound nurse duties to foraging—drive changes in microbial strain composition, influencing metabolic capacity and pathogen defence. Advances in metabolomics, genomics and imaging have deepened our understanding of host-microbe metabolic cross-feeding, revealing how host-secreted nutrients foster colonisation by key symbionts. Global surveillance efforts have uncovered extensive viral diversity and transmission networks involving mites, pollen and bee-to-bee contact. Together, these findings underscore the importance of maintaining microbial balance as part of integrated strategies for sustainable apiculture, pollination security and agricultural productivity worldwide.

Research from Nature Portfolio

Recent studies have uncovered the metabolic foundations of host-microbe symbiosis within the honey bee gut. One investigation demonstrated that a core bacterial symbiont thrives on host-derived organic acids secreted into the gut lumen, rather than dietary sugars, revealing a tailored nutritional niche that supports microbial colonisation and shapes tryptophan metabolism. Another study examined how life-history stages of an ectoparasitic mite dictate its feeding strategy on honey bees. Dispersing mites subsist on fat-rich host tissues, while reproducing foundresses switch to haemolymph consumption, with corresponding shifts in parasite proteome and metabolome. These insights clarify how host secretions and parasite-induced feeding dynamics jointly influence bee immunity, colony resilience and the epidemiology of mite-vectored pathogens.

Honey Bee Health and Microbiome Dynamics publication trend

The graph below shows the total number of articles in honey bee health and microbiome dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Gut microbiome: The community of microorganisms residing in the honey bee digestive tract, contributing to nutrition and immunity.

Symbiont: An organism that lives in close association with a host, offering mutual or commensal benefits.

Ectoparasitic mite: A parasite that lives on the external surface of its host, such as Varroa destructor on honey bees.

Haemolymph: The circulatory fluid in insects, analogous to blood, that transports nutrients and immune cells.

Fat body: An insect tissue analogous to the vertebrate liver, involved in nutrient storage, detoxification and immune function.

Dysbiosis: A detrimental imbalance or alteration of the normal microbiome composition and function.

Metabolomics: The comprehensive analysis of small-molecule metabolites in biological systems to elucidate metabolic pathways.

References

1. Host-derived organic acids enable gut colonization of the honey bee symbiont Snodgrassella alvi. Nature Microbiology (2024).
2. Life-history stage determines the diet of ectoparasitic mites on their honey bee hosts. Nature Communications (2024).
3. Nationwide genomic surveillance reveals the prevalence and evolution of honeybee viruses in China. Microbiome (2023).
4. Turnover of strain-level diversity modulates functional traits in the honeybee gut microbiome between nurses and foragers. Genome Biology (2023).
5. Antibiotic exposure perturbs the gut microbiota and elevates mortality in honeybees. PLOS Biology (2017).
6. RNA Viruses in Hymenopteran Pollinators: Evidence of Inter-Taxa Virus Transmission via Pollen and Potential Impact on Non-Apis Hymenopteran Species. PLOS ONE (2010).