A grounded synthesis of the most-cited open-access papers on European foulbrood. Every claim is traceable to a cited study; curated overview, not exhaustive.
🔍 Search these papers · 📂 Browse the corpus
European foulbrood (EFB) is a globally distributed bacterial brood disease caused by Melissococcus plutonius, which infects and kills honey bee larvae and, in severe cases, can lead to colony collapse (Lewkowski 2019). Once considered a minor "stress" disease, EFB incidence has increased in several regions, prompting renewed research into its biology and control.
M. plutonius is a fastidious organism requiring microaerophilic-to-anaerobic culture conditions, which long hampered study (Arai 2012). Sensitive PCR detection revealed that the bacterium is present in many colonies without visible symptoms, so EFB carriage is far more widespread than overt disease — complicating diagnosis and control (Forsgren 2005).
The pathogen shows substantial genetic and phenotypic diversity, and this variation maps onto differences in virulence (Lewkowski 2019; Arai 2012). Researchers have begun identifying putative virulence determinants that distinguish aggressive from benign strains, work essential to predicting which infections will cause serious disease (Grossar 2020). Disease severity is also shaped by secondary bacterial invaders that colonise dying larvae (Lewkowski 2019).
Like chalkbrood, EFB expression is influenced by colony condition. Pesticide exposure — neonicotinoids and fungicides linked to immunosuppression — increased larval susceptibility to M. plutonius in controlled tests, tying EFB into the broader multi-stressor picture (Wood 2020). Outbreaks recur in commercial operations, where management pressures and stress converge (Thebeau 2022).
EFB is a re-emerging disease whose impact depends on pathogen strain, secondary invaders and host stress rather than infection alone. Because the bacterium circulates symptomlessly, monitoring and reducing predisposing stress — alongside antibiotic treatment where permitted — are central to control.
Lewkowski & Erler, MicrobiologyOpen 2019 · 38 citations — Pathogen diversity and the role of secondary invaders in disease severity.
Forsgren et al., Microbial Ecology 2005 · 28 citations — Reveals widespread symptomless carriage.
Arai et al., PLoS ONE 2012 · 65 citations — Genetic diversity and experimental disease induction.
Grossar et al., Virulence 2020 · 37 citations — Candidate virulence factors for disease prediction.
Wood et al., Insects 2020 · 13 citations — Pesticide exposure increases larval susceptibility.
Curated synthesis of representative and most-cited studies — not exhaustive. Explore via search. Related: Pests overview · American foulbrood · Multi-stressor model.