DEROME LABORATORY - News

New Research on Amazonian Fish Microbiomes

11/6/2020

A new research article, written by François-Étienne Sylvain, Sidki Bouslama, Émie Audet-Gilbert and colleagues from La Trobe University (Australia) and INPA (Brazil) has been accepted for publication in Applied and Environnmental Microbiology! This study is one of the first to investigate how the phylogenetic structure of microbial communities from two distinct fish tissues are shaped by species- and habitat-specific factors. Congratulations to all!

To read the article, click below:

Sylvain FÉ, Holland A, Bouslama S, Audet-Gilbert, É, Lavoie, C, Luis Val, ., & Derome, N. 2020. Fish skin and gut microbiomes show contrasting signatures of host species and habitat. Appl Environ Microbiol. 00789-20.

New Review on Fish Microbiota Reshaping Strategies

11/6/2020

A new review by Profs. Marie Filteau and Nicolas Derome has been published in Evolutionary Applicat ions. It discusses the current microbial community manipulation strategies and applications in the fish industry.
To read this review (open access), click on the link below :

A continuously changing selective context on microbial communities associated with fish, from egg to fork. Evol Appl. 13(6):1298-1319.

New Publication on Yellow Perch Microbiota

11/4/2020

A research article from PhD alumni Bachar Cheaib et al. is currently in press at Animal Microbiome! To know more about how the yellow perch microbiota resists colonization by exogenous bacteria under cadmium exposition, click below to see the preprint:

Cheaib B, Seghouani H, Llewellyn MS, Vandal-Lenghan K, Mercier PL, Derome N. 2020. The yellow perch (Perca flavescens) microbiome revealed resistance to colonisation mostly associated with neutralism driven by rare taxa under cadmium disturbance. In press in Animal Microbiome.

New Publication on Coral Bleaching

11/4/2020

A new review has been published in Microorganisms by our team and colleagues from France and French Polynesia! It discusses coral bleaching under the light of host-microbiota interactions. To view this article, click on the citation below:

Boilard A, Dubé CE, Gruet C, Mercière A, Hernandez-Agreda A and Derome N. 2020. Defining Coral Bleaching as a Microbial Dysbiosis within the Coral Holobiont. Microorganisms 8, 1682.

Team Highlights - Naomie Bleau

5/16/2020

Naomie Bleau, MSc Student co-supervised by Pierre Giovenazzo and Nicolas Derome, had her MSc thesis mentioned in Université Laval's Postgraduate Honor Roll last week. Congratulations!

Naomie's MSc thesis discusses how probiotics affect the the gut microbiota of honeybees and colony performance in nordic climate.

Team Highlights - Undergraduate Scholarships

4/17/2020

Congratulations to Nicolas Leroux and Jeanne Picher-Labrie who both received an undergraduate summer scholarship from the NSERC this spring semester.

Nicolas will study the host-microbiota interactions in flag chchlid (Mesonauta festivus), an amazonian fish, while Jeanne will work on developing an axenic zebrafish (Danio rerio) model to study stress factors affecting host-microbiota interactions.

Team Highlights - Sarah El Khoury

4/16/2020

A PhD student from our team, Sarah El Khoury, won the first price of the 2019 Student Merit Award of the Canadian Association of Professional Apiculturists. The awards committee felt that Sarah was the most deserving candidate for her work to understand the relationships between pesticides and probiotics in bees.

More about Sarah's work:

Sarah studies the impact of clothianidin on the intestinal flora of bees. It is now well documented that functions associated with immune response and behavior are controlled by the intestinal flora in insects.

Given that clothianidin is persistent in the environment, there is an urgent need to develop alternative and sustainable strategies to mitigate its toxic effects on bee health. Her results showed that we must not underestimate low doses of pesticides introduced inside our environment.

Moreover, her results highlighted promising endogenous bacterial probiotic candidates to develop a probiotic formulation mitigating the negative impact of neonicotinoid exposure on bee colonies.

New Publication on host-microbiota responses to heavy metal contamination (Video abstract)

2/12/2020

The objective of this experimental microbial ecology and evolution study was to test the resilience of the microbiota in a host-microbiota system after exposure to a gradient of contamination with cadmium chloride.

Watch the video abstract here:

https://www.youtube.com/watch?v=6ORwqQYqS3U

Read the whole paper here:

Cheaib, B., Seghouani, H., Ijaz, U.Z., Derome, N. Community recovery dynamics in yellow perch microbiome after gradual and constant metallic perturbations. Microbiome 8, 14 (2020). https://doi.org/10.1186/s40168-020-0789-0

MORE INFORMATION:

By combining modeling approaches for assembling ecological communities with network analyzes, we were able to quantify the contribution of the different evolutionary forces (neutral and non-neutral) to the taxonomic dynamics of the different microbial niches, as well as the interaction dynamics between the different members of microbial communities.

The novelty of this study suggests that the resilience tested on the yellow perch microbiota varies according to the type of tissue and the level of metal contamination: the skin microbiota has stabilized towards an intermediate structure, the intestinal microbiota has converged towards that of the group. control, suggesting strong resilience. The gradual contamination compared to the constant was more harmful on the composition and structure of all types of microbial communities, as well as on the bioaccumulation of Cadmium in the livers of juvenile fish.

Two Derome Lab students elected on RAQ student board

2/11/2020

Two graduate students from our lab, François-Étienne Sylvain (PhD) and Aurélie Boilard (MSc), have been recently elected as student representatives of the Ressources Aquatiques Québec strategic research network.

Congratulations to you both!

Team Highlights - Fall 2019

12/19/2019

Students from our research group have distinguished themselves on several occasions during this semester.

Laurence Auger, PhD student

Melville-Duporte Best Poster Award (QES 2019 Conference)

François-Étienne Sylvain, PhD student

Prix de la relève étoile Louis-Berlinguet (FRQNT)

Aurélie Boilard, MSc student

Alexander-Graham-Bell MSc Scholarship (NSERC)
Michael-Smith International Study Supplement (NSERC)

Congratulations to you all!