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Imidacloprid decreases honey bee survival rates but does not affect the gut microbiome

Raymann Kasie, Motta Erick V. S., Girard Catherine, Riddington Ian M., Dinser Jordan A. et Moran Nancy A.. (2018). Imidacloprid decreases honey bee survival rates but does not affect the gut microbiome. Applied and Environmental Microbiology, 84, (13), e00545-18.

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URL officielle: http://dx.doi.org/doi:10.1128/AEM.00545-18

Résumé

Accumulating evidence suggests that pesticides have played a role in the increased rate of honey bee colony loss. One of the most commonly used pesticides in the United States is the neonicotinoid imidacloprid. Although the primary mode of action of imidacloprid is on the insect nervous system, it has also been shown to cause changes in insects' digestive physiology and alter the microbiota of Drosophila melanogaster larvae. The honey bee gut microbiome plays a major role in bee health. Although many studies have shown that imidacloprid affects honey bee behavior, its impact on the microbiome has not been fully elucidated. Here, we investigated the impact of imidacloprid on the gut microbiome composition, survivorship, and susceptibility to pathogens of honey bees. Consistent with other studies, we show that imidacloprid exposure results in an elevated mortality of honey bees in the hive and increases the susceptibility to infection by pathogens. However, we did not find evidence that imidacloprid affects the gut bacterial community of honey bees. Our in vitro experiments demonstrated that honey bee gut bacteria can grow in the presence of imidacloprid, and we found some evidence that imidacloprid can be metabolized in the bee gut environment. However, none of the individual bee gut bacterial species tested could metabolize imidacloprid, suggesting that the observed metabolism of imidacloprid within in vitro bee gut cultures is not caused by the gut bacteria. Overall, our results indicate that imidacloprid causes increased mortality in honey bees, but this mortality does not appear to be linked to the microbiome.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0099-2240
Volume:84
Numéro:13
Pages:e00545-18
Version évaluée par les pairs:Oui
Date:2018
Identifiant unique:10.1128/AEM.00545-18
Sujets:Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Sciences naturelles et génie > Sciences naturelles > Chimie
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:honey bee, imidacloprid, metabolism, microbiome, abeille domestique, imidaclopride, métabolisme
Déposé le:23 juill. 2021 15:47
Dernière modification:23 juill. 2021 15:47
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