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Molecular epidemiology of Paenibacillus larvae

ABSTRACT: Molecular epidemiology of Paenibacillus larvae, the causative agent of American foulbrood in honey bees

PROVIDER: PRJEB12365 | ENA |

REPOSITORIES: ENA

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The overall response of Paenibacillus larvae to bodily fluids of honeybee larvae (Apis mellifera).

Project description:Paenibacillus larvae, the causal agent of American Foulbrood disease (AFB), affects honeybee health worldwide. The present study investigates the transcriptional response of this Gram-positive, endospore-forming bacterium to bodily fluids from honeybee larvae. Four different conditions were evaluated with a loop design: sampling of in vitro grown P. larvae cultures one or four hours after addition of larval fluids or BHIT-broth (C1, T1, C4, T4).

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The habitat disruption induces immune-suppression and oxidative stress in honey bees

Project description:Background: Honey bee is a major insect used for pollination of a number of commercial crops worldwide. However, the number of managed honey bee colonies has recently declined in several countries, and a number of possible causes are proposed. Although the use of honey bees for pollination can be considered as disruption of the habitat, its effects on honey bees' physiology have never been addressed. In Japan, more than 100 thousands colonies are annually used for pollination, and intriguingly 80% of them are used in greenhouses. Recently, honey bee colonies have often collapsed when they are introduced into greenhouses. Thus, to suppress colony collapses and maintain the number of worker bees in the colonies are essential for successful long-term pollination in greenhouses and recycling honey bee colonies.

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Proteomic insight into the interaction of Paenibacillus larvae with honey bee larvae before capping collected from an American foulbrood outbreak

Project description:The samples used in this study originated from colonies of managed European honey bees (A. mellifera) that were at the epicenter of an AFB outbreak in 2020. The colonies were officially examined by the State Veterinary Administration of the Czech Republic. For our analyses, we targeted brood samples recognized as larvae before capping. Samples from two sites, namely, the villages Nevsova (denoted by N) and Tetcice (denoted by T), are included in this study. We aimed to analyze samples of honey bee broods infected and affected by the pathogenic bacterium P. larvae. The colonies from which we collected samples had typical clinical signs of AFB. For our analysis, we selected larvae just before capping. We decided to analyze the samples using high-throughput proteomics, and to select an array of samples, it was necessary to confirm whether the samples were infected by P. larvae. Importantly, the presence/absence of P. larvae was confirmed using PCR before the proteomic analysis in the same individual sample. The study was supported by project no. QK1710228 (NAZV) and RO0418 of the Ministry of Agriculture of the Czech Republic.

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