Full Text Journal Articles by
Author Eva Forsgren

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Putative determinants of virulence in Melissococcus plutonius, the bacterial agent causing European foulbrood in honey bees.

Daniela Grossar, Verena Kilchenmann, Eva Forsgren, Jean-Daniel Charrière, Laurent Gauthier, Michel Chapuisat, Vincent Dietemann,

MELISSOCOCCUS PLUTONIUS:is a bacterial pathogen that causes epidemic outbreaks of European foulbrood (EFB) in honey bee populations. The pathogenicity of a bacterium depends on its virulence, and understanding the mechanisms influencing virulence may allow for improved disease control and containment. Using a standardized in vitro assay, we demonstrate that virulence ... Read more >>

Virulence (Virulence)
[2020, 11(1):554-567]

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Correction to: American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks between disease and colony development.

Jörg G Stephan, Joachim R de Miranda, Eva Forsgren,

Unfortunately, the original version of the article [1] contained an error. The author has brought to our attention that the article title is truncated in the published version. The correct title is American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks between disease and colony development. Instead, it was ... Read more >>

BMC Ecol. (BMC ecology)
[2020, 20(1):16]

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American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks.

Jörg G Stephan, Joachim R de Miranda, Eva Forsgren,

BACKGROUND:The most severe bacterial disease of honeybees is American foulbrood (AFB). The epidemiology of AFB is driven by the extreme spore resilience, the difficulty of bees to remove these spores, and the considerable incidence of undetected spore-producing colonies. The honeybee collective defence mechanisms and their feedback on colony development, which ... Read more >>

BMC Ecol. (BMC ecology)
[2020, 20(1):15]

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American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks between disease and colony development

Jörg Stephan, Joachim Rodrigues De Miranda, Eva Forsgren,

Abstract Background: The most severe bacterial disease of honeybees is American foulbrood (AFB). The epidemiology of AFB is driven by the extreme spore resilience, the difficulty of bees to remove these spores, and the considerable incidence of undetected spore-producing colonies. The honeybee collective defence mechanisms and their feedback on colony ... Read more >>

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Feeding Honeybee Colonies with Honeybee-Specific Lactic Acid Bacteria (Hbs-LAB) Does Not Affect Colony-Level Hbs-LAB Composition or Paenibacillus larvae Spore Levels, Although American Foulbrood Affected Colonies Harbor a More Diverse Hbs-LAB Community.

Sepideh Lamei, Jörg G Stephan, Bo Nilson, Sander Sieuwerts, Kristian Riesbeck, Joachim R de Miranda, Eva Forsgren,

The main current methods for controlling American Foulbrood (AFB) in honeybees, caused by the bacterial pathogen Paenibacillus larvae, are enforced incineration or prophylactic antibiotic treatment, neither of which is fully satisfactory. This has led to an increased interest in the natural relationships between the pathogenic and mutualistic microorganisms of the ... Read more >>

Microb. Ecol. (Microbial ecology)
[2020, 79(3):743-755]

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Erratum for Stephan et al., "Honeybee-Specific Lactic Acid Bacterium Supplements Have No Effect on American Foulbrood-Infected Honeybee Colonies".

Jörg G Stephan, Sepideh Lamei, Jeffery S Pettis, Kristian Riesbeck, Joachim R de Miranda, Eva Forsgren,

Appl. Environ. Microbiol. (Applied and environmental microbiology)
[2019, 85(15):]

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Honeybee-Specific Lactic Acid Bacterium Supplements Have No Effect on American Foulbrood-Infected Honeybee Colonies.

Jörg G Stephan, Sepideh Lamei, Jeffery S Pettis, Kristian Riesbeck, Joachim R de Miranda, Eva Forsgren,

Paenibacillus larvae, the causative agent of American foulbrood (AFB), is the primary bacterial pathogen affecting honeybees and beekeeping. The main methods for controlling AFB are incineration of diseased colonies or prophylactic antibiotic treatment (e.g., with tylosin), neither of which is fully satisfactory. The search for superior means for controlling AFB ... Read more >>

Appl. Environ. Microbiol. (Applied and environmental microbiology)
[2019, 85(13):]

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An integrated management strategy to prevent outbreaks and eliminate infection pressure of American foulbrood disease in a commercial beekeeping operation.

Barbara Locke, Matthew Low, Eva Forsgren,

The bacterial disease American Foulbrood (AFB), caused by the Gram-positive bacterium Paenibacillus larvae, is considered the most contagious and destructive infectious disease affecting honeybees world-wide. The resilient nature of P. larvae bacterial spores presents a difficult problem for the control of AFB. Burning clinically symptomatic colonies is widely considered the ... Read more >>

Prev. Vet. Med. (Preventive veterinary medicine)
[2019, 167:48-52]

Cited: 1 time

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Clothianidin seed-treatment has no detectable negative impact on honeybee colonies and their pathogens.

Julia Osterman, Dimitry Wintermantel, Barbara Locke, Ove Jonsson, Emilia Semberg, Piero Onorati, Eva Forsgren, Peter Rosenkranz, Thorsten Rahbek-Pedersen, Riccardo Bommarco, Henrik G Smith, Maj Rundlöf, Joachim R de Miranda,

Interactions between multiple stressors have been implicated in elevated honeybee colony losses. Here, we extend our landscape-scale study on the effects of placement at clothianidin seed-treated oilseed rape fields on honeybees with an additional year and new data on honeybee colony development, swarming, mortality, pathogens and immune gene expression. Clothianidin ... Read more >>

Nat Commun (Nature communications)
[2019, 10(1):692]

Cited: 2 times

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Diagnostic protocols for the detection of Acheta domesticus densovirus (AdDV) in cricket frass.

Emilia Semberg, Joachim R de Miranda, Matthew Low, Anna Jansson, Eva Forsgren, Åsa Berggren,

The European house cricket (Acheta domesticus) is a species of interest for the emerging insect-as-food industry. Acheta domesticus densovirus (AdDV) is a member of the Parvoviridae virus family which infects A. domesticus, causing widespread mortality and even extinction of local cricket populations. Despite the well-known detrimental effects of AdDV in ... Read more >>

J. Virol. Methods (Journal of virological methods)
[2019, 264:61-64]

Cited: 0 times

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Field-level clothianidin exposure affects bumblebees but generally not their pathogens.

Dimitry Wintermantel, Barbara Locke, Georg K S Andersson, Emilia Semberg, Eva Forsgren, Julia Osterman, Thorsten Rahbek Pedersen, Riccardo Bommarco, Henrik G Smith, Maj Rundlöf, Joachim R de Miranda,

Neonicotinoids are implicated in bee declines and laboratory studies imply that they impair the bee immune system, thereby precipitating a rise in pathogen levels. To establish whether such synergisms reduce bee performance in real-world agricultural landscapes, we analysed the microbial composition of the bumblebee (Bombus terrestris) samples from our recent ... Read more >>

Nat Commun (Nature communications)
[2018, 9(1):5446]

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Using whole genome sequencing to study American foulbrood epidemiology in honeybees.

Joakim Ågren, Marc Oliver Schäfer, Eva Forsgren,

American foulbrood (AFB), caused by Paenibacillus larvae, is a devastating disease in honeybees. In most countries, the disease is controlled through compulsory burning of symptomatic colonies causing major economic losses in apiculture. The pathogen is endemic to honeybees world-wide and is readily transmitted via the movement of hive equipment or ... Read more >>

PLoS ONE (PloS one)
[2017, 12(11):e0187924]

Cited: 1 time

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Trueness and precision of the real-time RT-PCR method for quantifying the chronic bee paralysis virus genome in bee homogenates evaluated by a comparative inter-laboratory study.

Frank Schurr, Nicolas Cougoule, Marie-Pierre Rivière, Magali Ribière-Chabert, Hamid Achour, Dán Ádám, Carlos Castillo, Dirk C de Graaf, Eva Forsgren, Anna Granato, Sirpa Heinikainen, Júlia Jurovčíková, Per Kryger, Christine Manson, Marie-Françoise Ménard, Stéphane Perennes, Marc O Schäfer, Elena San Miguel Ibañez, João Silva, Ivana Tlak Gajger, Victoria Tomkies, Ivan Toplak, Alain Viry, Dagmara Zdańska, Eric Dubois,

The Chronic bee paralysis virus (CBPV) is the aetiological agent of chronic bee paralysis, a contagious disease associated with nervous disorders in adult honeybees leading to massive mortalities in front of the hives. Some of the clinical signs frequently reported, such as trembling, may be confused with intoxication syndromes. Therefore, ... Read more >>

J. Virol. Methods (Journal of virological methods)
[2017, 248:217-225]

Cited: 1 time

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Improvement of identification methods for honeybee specific Lactic Acid Bacteria; future approaches.

Sepideh Lamei, Yue O O Hu, Tobias C Olofsson, Anders F Andersson, Eva Forsgren, Alejandra Vásquez,

Honeybees face many parasites and pathogens and consequently rely on a diverse set of individual and group-level defenses to prevent disease. The crop microbiota of Apis mellifera, composed of 13 Lactic Acid Bacterial (LAB) species within the genera Lactobacillus and Bifidobacterium, form a beneficial symbiotic relationship with each other and ... Read more >>

PLoS ONE (PloS one)
[2017, 12(3):e0174614]

Cited: 1 time

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The Curious Case of Achromobacter eurydice, a Gram-Variable Pleomorphic Bacterium Associated with European Foulbrood Disease in Honeybees.

Silvio Erler, Oleg Lewkowski, Anja Poehlein, Eva Forsgren,

Honeybees are prone to parasite and pathogen infestations/infections due to their social colony life. Bacterial pathogens in particular lead to destructive infections of the brood. European foulbrood is caused by the bacterium Melissococcus plutonius in combination with several other Gram-positive bacteria (Achromobacter eurydice, Bacillus pumilus, Brevibacillus laterosporus, Enterococcus faecalis, Paenibacillus ... Read more >>

Microb. Ecol. (Microbial ecology)
[2018, 75(1):1-6]

Cited: 7 times

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Sample preservation, transport and processing strategies for honeybee RNA extraction: Influence on RNA yield, quality, target quantification and data normalization.

Eva Forsgren, Barbara Locke, Emilia Semberg, Ane T Laugen, Joachim R de Miranda,

Viral infections in managed honey bees are numerous, and most of them are caused by viruses with an RNA genome. Since RNA degrades rapidly, appropriate sample management and RNA extraction methods are imperative to get high quality RNA for downstream assays. This study evaluated the effect of various sampling-transport scenarios ... Read more >>

J. Virol. Methods (Journal of virological methods)
[2017, 246:81-89]

Cited: 5 times

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Dynamics of Apis mellifera Filamentous Virus (AmFV) Infections in Honey Bees and Relationships with Other Parasites.

Ulrike Hartmann, Eva Forsgren, Jean-Daniel Charrière, Peter Neumann, Laurent Gauthier,

Apis mellifera filamentous virus (AmFV) is a large double stranded DNA virus of honey bees, but its relationship with other parasites and prevalence are poorly known. We analyzed individual honey bees from three colonies at different times post emergence in order to monitor the dynamics of the AmFV gut colonization ... Read more >>

Viruses (Viruses)
[2015, 7(5):2654-2667]

Cited: 5 times

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Increased tolerance and resistance to virus infections: a possible factor in the survival of Varroa destructor-resistant honey bees (Apis mellifera).

Barbara Locke, Eva Forsgren, Joachim R de Miranda,

The honey bee ectoparasitic mite, Varroa destructor, has a world-wide distribution and inflicts more damage than all other known apicultural diseases. However, Varroa-induced colony mortality is more accurately a result of secondary virus infections vectored by the mite. This means that honey bee resistance to Varroa may include resistance or ... Read more >>

PLoS ONE (PloS one)
[2014, 9(6):e99998]

Cited: 17 times

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Diversity of honey stores and their impact on pathogenic bacteria of the honeybee, Apis mellifera.

Silvio Erler, Andreas Denner, Otilia Bobiş, Eva Forsgren, Robin F A Moritz,

Honeybee colonies offer an excellent environment for microbial pathogen development. The highest virulent, colony killing, bacterial agents are Paenibacillus larvae causing American foulbrood (AFB), and European foulbrood (EFB) associated bacteria. Besides the innate immune defense, honeybees evolved behavioral defenses to combat infections. Foraging of antimicrobial plant compounds plays a key ... Read more >>

Ecol Evol (Ecology and evolution)
[2014, 4(20):3960-3967]

Cited: 12 times

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Correction: Symbionts as Major Modulators of Insect Health: Lactic Acid Bacteria and Honeybees.

Alejandra Vásquez, Eva Forsgren, Ingemar Fries, Robert J. Paxton, Emilie Flaberg, Laszlo Szekely, Tobias C. Olofsson,

PLoS ONE (PloS one)
[2012, 7(7):]

Cited: 0 times

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Temporal study of Nosema spp. in a cold climate.

Eva Forsgren, Ingemar Fries,

In a nationwide Swedish survey, 967 honey bee colonies from 521 beekeepers were sampled in the spring of 2007 and the samples assayed for Nosema spp. infections. Of the 319 positive samples, only 32 samples contained a proportion of N. ceranae DNA in mixed infections with both Nosema spp. above the ... Read more >>

Environ Microbiol Rep (Environmental microbiology reports)
[2013, 5(1):78-82]

Cited: 8 times

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Acaricide Treatment Affects Viral Dynamics in Varroa destructor-Infested Honey Bee Colonies via both Host Physiology and Mite Control.

Barbara Locke, Eva Forsgren, Ingemar Fries, Joachim R. de Miranda,

Appl. Environ. Microbiol. (Applied and environmental microbiology)
[2012, 78(6):2073-2073]

Cited: 2 times

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Symbionts as major modulators of insect health: lactic acid bacteria and honeybees.

Alejandra Vásquez, Eva Forsgren, Ingemar Fries, Robert J Paxton, Emilie Flaberg, Laszlo Szekely, Tobias C Olofsson,

Lactic acid bacteria (LAB) are well recognized beneficial host-associated members of the microbiota of humans and animals. Yet LAB-associations of invertebrates have been poorly characterized and their functions remain obscure. Here we show that honeybees possess an abundant, diverse and ancient LAB microbiota in their honey crop with beneficial effects ... Read more >>

PLoS ONE (PloS one)
[2012, 7(3):e33188]

Cited: 137 times

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Lethal infection thresholds of Paenibacillus larvae for honeybee drone and worker larvae (Apis mellifera).

Dieter Behrens, Eva Forsgren, Ingemar Fries, Robin F A Moritz,

We compared the mortality of honeybee (Apis mellifera) drone and worker larvae from a single queen under controlled in vitro conditions following infection with Paenibacillus larvae, a bacterium causing the brood disease American Foulbrood (AFB). We also determined absolute P. larvae cell numbers and lethal titres in deceased individuals of ... Read more >>

Environ. Microbiol. (Environmental microbiology)
[2010, 12(10):2838-2845]

Cited: 3 times

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Comparative virulence of Nosema ceranae and Nosema apis in individual European honey bees.

Eva Forsgren, Ingemar Fries,

Nosema apis and Nosema ceranae are intracellular microsporidian parasites infecting the midgut epithelial cells of adult honey bees. N. ceranae was considered to be restricted to the Asian honey bee, Apis cerana, but is nowadays a parasite found also in the European honey bee (Apis mellifera) across most of the ... Read more >>

Vet. Parasitol. (Veterinary parasitology)
[2010, 170(3-4):212-217]

Cited: 76 times

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