Areas of expertise
Microbial ecology of bioprocesses , Environmental microbiology
- Full Professor
Armand-Frappier Santé Biotechnologie Research Centre
531 des Prairies Blvd.
Laval, Quebec H7V 1B7
Canada
Research interests
Molecular Biology of microorganisms capable of degrading pollutants
Chemical products released from industrial, agricultural, municipal and domestic activities have contaminated several areas during the last decades and have created important pollution problems. Several compounds such as aromatic molecules have mutagenic, teratogenic and/or carcinogenic properties. Conventional methods of decontamination or storage are expensive and not efficient, causing an urgent need of new methods. Degradation of these products by microorganisms offers a promising approach to decontaminate polluted sites.
It was shown that several bacterial strains and several bacterial consortium are capable, in aerobic or anaerobic conditions, to degrade different aromatic compounds such as chlorophenols, polychlorinated biphenyl (PCB), phenolic compounds and polycyclic aromatic hydrocarbons (PAH). These bacteria use different biochemical pathways to cleave the benzenic rings; the resulting molecules being more easily assimilated.
Our group has isolated several aerobic and anaerobic bacterial strains capable of degrading aromatic compounds. One of our objectives is to characterize genes encoding for enzymes involved in the degradation of aromatic compounds by studying their chromosomic arrangement, their sequence and their expression. Furthermore, we studied the gene products for their enzymatic properties and their structures.
Study of microbial diversity in bioprocesses
Several types of biological processes have been developed to treat contaminated soil/sediments, liquid effluents and exhausted air. Although physico-chemical parameters can be easily controlled by engineers, the understanding of what happens inside these bioprocesses often remains unclear. For instances, what kind of microorganisms are implicated in these bioprocesses, and what are their abundance and their physiological states are still unanswered questions. How the microbial population evolves during the ongoing process, and how it responds to different conditions or stresses remain to be determined. Finally, the spatial organization of microorganisms and the interactions occurring between each type of microorganisms and with the support need to be understood.
The majority of bioprocesses operates with complex and uncharacterized microbial communities. Research on the ecology of these communities is impaired by a lack of tools to analyse microorganisms which cannot be cultivated. Culture methods may favor fast-growing microorganisms that have not numerical or ecological importance in a process. The use of non-culturable approaches with molecular tools provides a more accurate evaluation of a microbial community.
Our research aims to evaluate the dynamics of microbial communities associated with biological processes of depollution with molecular tools. We use these tools to identify microorganisms (with the ribosomal gene sequences) present in the bioprocesses and to develop specific DNA probes for the detection and the monitoring of these microorganisms by fluorescent in situ hybridization. With epifluorescent and confocal microscopy, it is now possible to visualize specific microorganisms directly in their environment, for example, in biofilms.
This research will increase our fundamental knowledge by knowing how microorganisms participate in the studied bioprocesses. Combined with physico-chemical parameters, it will allow engineers to generate a more accurate modelization of the bioprocesses, leading on a better design and improvement of larger-scale bioprocesses. For example, it will allow early and precise diagnostics of some operational problems.
Dr. Richard Villemur, Ph.D. (Biochemistry, Université de Montréal, [1987]; postdoctoral studies at the National Research Council of Canada in Halifax [1987-1989] and at the University of Minnesota [1990-1993]) is a professor at INRS-Institut Armand-Frappier since 1993. His is the specialist in molecular biology for the Groupe de Recherche en Microbiologie de l’Environnement at INRS-Institut Armand-Frappier.
The Research Group on Environmental Microbiology is seeking Master and PhD candidates. For more details see our web site at http://www.microbio-environnement.org
Publications
HAJJ-MOHAMAD, M., HACHAD, M., DESCHAMPS, G., SAUVÉ, S., VILLEMUR, R., BLAIS, M. A., PRÉVOST, M., & DORNER, S. (2019).
Fecal contamination of storm sewers: Evaluating wastewater micropollutants, human-specific Bacteroides 16S rRNA, and mitochondrial DNA genetic markers as alternative indicators of sewer cross connections.
Science of the Total Environment, 659, 548-560.
GEOFFROY, V., PAYETTE, G., MAUFFREY, F., LESTIN, L., CONSTANT, P., & VILLEMUR, R. (2018).
Strain-level genetic diversity of Methylophaga nitratireducenticrescens confers plasticity to denitrification capacity in a methylotrophic marine denitrifying biofilm.
Peerj, 6(e4679), 1-25.
MAUFFREY, F., CUCAITA, A., CONSTANT, P., & VILLEMUR, R. (2017).
Denitrifying metabolism of the methylotrophic marine bacterium Methylophaga nitratireducenticrescens strain JAM1.
PeerJ, 5(e4098), 1-22. doi: 0.7717/peerj.4098
LAPRADE, N., CLOUTIER, M., LAPEN, D. R., TOPP, E., WILKES, G., VILLEMUR, R., & KHAN, I. U. (2016).
Detection of virulence, antibiotic resistance and toxin (VAT) genes in Campylobacter species using newly developed multiplex PCR assays.
Journal of Microbiological Methods, 124, 41-47.
WHITEDUCK-LEVEILLEE, J., CLOUTIER, M., TOPP, E., LAPEN, D. R., TALBOT, G., VILLEMUR, R., & KHAN, I. U. (2016). Development and evaluation of multiplex PCR assays for rapid detection of virulence-associated genes in Arcobacter species.
Journal of Microbiological Methods, 121, 59-65.
WHITEDUCK-LEVEILLEE, K., WHITEDUCK-LEVEILLEE, J., CLOUTIER, M., TAMBONG, J. T., XU, R., TOPP, E., ARTS, M. T., CHAO, J., ADAM, Z., LEVESQUE, C. A., LAPEN, D. R., VILLEMUR, R., & KHAN, I. U. (2016).
Identification, characterization and description of Arcobacter faecis sp. nov., isolated from a human waste septic tank. Systematic and Applied Microbiology, 39(2), 93-99.
WHITEDUCK-LEVEILLEE, K., WHITEDUCK-LEVEILLEE, J., CLOUTIER, M., TAMBONG, J. T., XU, R., TOPP, E., ARTS, M. T., CHAO, J., ADAM, Z., LEVESQUE, C. A., LAPEN, D. R., VILLEMUR, R., TALBOT, G. & KHAN, I. U. (2015).
Arcobacter lanthieri sp. nov., isolated from pig and dairy cattle manure,
International Journal of Systematic and Evolutionary Microbiology, 65(8):. 2709-2716
MARTINEAU, C., MAUFFREY, F. & VILLEMUR, R. (2015)
Comparative Analysis of Denitrifying Activities of Hyphomicrobium nitrativorans, Hyphomicrobium denitrificans, and Hyphomicrobium zavarzinii,
Applied and Environmental Microbiology, 81, 15, 5003-14
VILLEMUR, R., JUTEAU, P., BOUGIE, V., MÉNARD, J. & DÉZIEL, E. (2015)
Development of four-stage moving bed biofilm reactor train with a pre-denitrification configuration for the removal of thiocyanate and cyanate,
Bioresource Technology, 181, 254-62
VILLEMUR, R., IMBEAU, M., VUONG, M. N., MASSON, L. & PAYMENT, P. (2015)
An environmental survey of surface waters using mitochondrial DNA from human, bovine and porcine origin as fecal source tracking markers,
Water Research, 69, 143-153
MARTINEAU, C., VILLENEUVE, C., MAUFFREY, F. & VILLEMUR, R. (2014)
Complete Genome Sequence of Hyphomicrobium nitrativorans Strain NL23, a Denitrifying Bacterium Isolated from Biofilm of a Methanol-Fed Denitrification System Treating Seawater at the Montreal Biodome,
Genome Announc, 2, 1,
VUONG, N. M., VILLEMUR, R., PAYMENT, P., BROUSSEAU, R., TOPP, E. & MASSON, L. (2013)
Fecal source tracking in water using a mitochondrial DNA microarray,
Water Research, 47, 1, 16-30
VILLENEUVE, C., MARTINEAU, C., MAUFFREY, F. & VILLEMUR, R. (2013)
Methylophaga nitratireducenticrescens sp. nov. and Methylophaga frappieri sp. nov., isolated from the biofilm of the methanol-fed denitrification system treating the seawater at the Montreal Biodome,
International Journal of Systematic and Evolutionary Microbiology, 63, Pt 6, 2216-2222
VILLEMUR, R., DOS SANTOS, S. C., OUELLETTE, J., JUTEAU, P., LEPINE, F. & DEZIEL, E. (2013)
Biodegradation of endocrine disruptors in solid-liquid two-phase partitioning systems by enrichment cultures,
Applied and Environmental Microbiology, 79, 15, 4701-11
VILLEMUR, R. (2013)
The pentachlorophenol-dehalogenating Desulfitobacterium hafniense strain PCP-1,
Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 368, 1616, 20120319
OUELLETTE, J., DOS SANTOS, S. C. C., LÉPINE, F., JUTEAU, P., DÉZIEL, E. & VILLEMUR, R. (2013)
High absorption of endocrine disruptors by Hytrel: Towards the development of a two-phase partitioning bioreactor
Journal of Chemical Technology and Biotechnology , 88, 1, 119-125
MARTINEAU, C., VILLENEUVE, C., MAUFFREY, F. & VILLEMUR, R. (2013)
Hyphomicrobium nitrativorans sp. nov., isolated from the biofilm of a methanol-fed denitrification system treating seawater at the Montreal Biodome,
International Journal of Systematic and Evolutionary Microbiology, 63, Pt 10, 3777-3781
LALANDE, J., VILLEMUR, R. & DESCHÊNES, L. (2013)
A New Framework to Accurately Quantify Soil Bacterial Community Diversity from DGGE,
Microbial Ecology, 66, 3, 647-658
AUFFRET, M., YERGEAU, E., PILOTE, A., PROULX, E., PROULX, D., GREER, C. W., VANDENBERG, G. & VILLEMUR, R. (2013)
Impact of water quality on the bacterial populations and off-flavours in recirculating aquaculture systems
FEMS Microbiology Ecology , 84, 2, 235-247
VILLENEUVE, C., MARTINEAU, C., MAUFFREY, F. & VILLEMUR, R. (2012)
Complete Genome Sequences of Methylophaga sp. Strain JAM1 and Methylophaga sp. Strain JAM7
Journal of Bacteriology , 194, 15, 4126-4127
VILLENEUVE, C., MARTINEAU, C., MAUFFREY, F. & VILLEMUR, R. (2012)
Methylophaga nitratireducenticrescens sp. nov. and Methylophaga frappieri sp. nov. isolated from the biofilm of the methanol-fed denitrification system treating the seawater at the Montreal Biodome (Canada)
International Journal of Systematic and Evolutionary Microbiology ,
AUCLAIR, J., PARENT, S. & VILLEMUR, R. (2012)
Functional Diversity in the Denitrifying Biofilm of the Methanol-Fed Marine Denitrification System at the Montreal Biodome
Microbial Ecology , 63, 4, 726-735
AUCLAIR, J., LÉPINE, F. & VILLEMUR, R. (2012)
A liquid chromatography – mass spectrometry method to measure (13)C-isotope enrichment for DNA stable-isotope probing
Canadian Journal of Microbiology , 58, 3, 287-92
ISABELLE, M., VILLEMUR, R., JUTEAU, P. & LÉPINE, F. (2011)
Isolation of estrogen-degrading bacteria from an activated sludge bioreactor treating swine waste, including a strain that converts estrone to beta-estradiol
Canadian Journal of Microbiology , 57, 7, 559-568
DISNARD, J., BEAULIEU, C. & VILLEMUR, R. (2011)
Composition of the bacterial biota in slime developed in two machines at a Canadian paper mill
Canadian Journal of Microbiology , 57, 2, 91-104
CALDWELL, J., PAYMENT, P. & VILLEMUR, R. (2011)
Mitochondrial DNA as Source Tracking Markers of Fecal Contamination . In: HAGEDORN, C., BLANCH, A. R. & HARWOOD, V. J. (Eds.)
Microbial Source Tracking: Methods, Applications, and Case Studies. Springer New York, 229-250
BISAILLON, A., BEAUDET, R., LÉPINE, F. & VILLEMUR, R. (2011)
Quantitative analysis of the relative transcript levels of four chlorophenol reductive Dehalogenase genes in Desulfitobacterium hafniense PCP-1 exposed to chlorophenols
Applied and Environmental Microbiology , 77, 17, 6261-6264
AUFFRET, M., PILOTE, A., PROULX, E., PROULX, D., VANDENBERG, G. & VILLEMUR, R. (2011)
Establishment of a real-time PCR method for quantification of geosmin-producing Streptomyces spp. in recirculating aquaculture systems
Water Research , 45, 20, 6753-62
BISAILLON, A., BEAUDET, R., LÉPINE, F., DÉZIEL, E. & VILLEMUR, R. (2010)
Identification and characterization of a novel CprA reductive dehalogenase specific to highly chlorinated phenols from Desulfitobacterium hafniense strain PCP-1
Applied and Environmental Microbiology , 76, 22, 7536-7540
AUCLAIR, J., LÉPINE, F., PARENT, S. & VILLEMUR, R. (2010)
Dissimilatory reduction of nitrate in seawater by a Methylophaga strain containing two highly divergent narG sequences
ISME Journal , 4, 10, 1302-1313
VILLEMUR, R., LACASSE, M. & MORIN, A. (2009)
Monitoring the Bacterial and Fungal Biota of Eleven Tobacco Grades Stored at Three Different Locations
Beiträge zur Tabalkforschung International , 23, 6, 368-376
VALLET, B., LABELLE, M. A., RIEGER, L., BIGRAS, S., PARENT, S., JUTEAU, P., VILLEMUR, R. & COMEAU, Y. (2009)
Inhibition of biological phosphorus removal in a sequencing moving bed biofilm reactor in seawater
Water Science and Technology , 59, 6, 1101-1110
RESTREPO, J., LABELLE, M. A., PARENT, S., VILLEMUR, R., JUTEAU, P. & COMEAU, Y. (2009)
Biological phosphorus removal and denitrification of fish farm effluent in a sequencing moving bed biofilm bioreactor.
Water Quality Research Journal of Canada , 44, 3, 233-242
NEHMÉ, B., GILBERT, Y., LÉTOURNEAU, V., FORSTER, R. J., VEILLETTE, M., VILLEMUR, R. & DUCHAINE, C. (2009)
Culture-independent characterization of archaeal biodiversity in swine confinement building bioaerosols
Applied and Environmental Microbiology , 75, 17, 5445-5450
LAFORTUNE, I., JUTEAU, P., DÉZIEL, E., LÉPINE, F., BEAUDET, R. & VILLEMUR, R. (2009)
Bacterial diversity of a consortium degrading high-molecular-weight polycyclic aromatic hydrocarbons in a two-liquid phase biosystem
Microbial Ecology , 57, 3, 455-68
KORTBAOUI, R., LOCAS, A., IMBEAU, M., PAYMENT, P. & VILLEMUR, R. (2009)
Universal mitochondrial PCR combined with species-specific dot-blot assay as a source-tracking method of human, bovine, chicken, ovine, and porcine in fecal-contaminated surface water
Water Research , 43, 7, 2002-2010
CONSTANT, P., POISSANT, L. & VILLEMUR, R. (2009)
Tropospheric H2 budget and the response of its soil uptake under the changing environment
Science of the Total Environment , 407, 6, 1809-1823
LAURIN, V., LABBE, N., PARENT, S., JUTEAU, P. & VILLEMUR, R. (2008)
Microeukaryote Diversity in a Marine Methanol-Fed Fluidized Denitrification System
Microbial Ecology , 56, 4, 637-648
CONSTANT, P., POISSANT, L. & VILLEMUR, R. (2008)
Isolation of Streptomyces sp. PCB7, the first microorganism demonstrating high-affinity uptake of tropospheric H2
Isme Journal , 2, 10, 1066-1076
CONSTANT, P., POISSANT, L. & VILLEMUR, R. (2008)
Annual hydrogen, carbon monoxide and carbon dioxide concentrations and surface to air exchanges in a rural area (Québec, Canada)
Atmospheric Environment , 42, 20, 5090-5100
VILLEMUR, R., CONSTANT, P., GAUTHIER, A., SHARECK, M. & BEAUDET, R. (2007)
Heterogeneity between 16S ribosomal RNA gene copies borne by one Desulfitobacterium strain is caused by different 100-200 bp insertions in the 5 ‘ region
Canadian Journal of Microbiology , 53, 1, 116-128
LABBE, N., LAURIN, V., JUTEAU, P., PARENT, S. & VILLEMUR, R. (2007)
Microbiological community structure of the biofilm of a methanol-fed, marine denitrification system, and identification of the methanol-utilizing microorganisms
Microbial Ecology , 53, 4, 621-630
CONSTANT, P., POISSANT, L., VILLEMUR, R., YUMVIHOZE, E. & LEAN, D. (2007)
Fate of inorganic mercury and methyl mercury within the snow cover in the low arctic tundra on the shore of Hudson Bay (Quebec, Canada)
Journal of Geophysical Research D: Atmospheres , 112, D08309
VILLEMUR, R., LANTHIER, M., BEAUDET, R. & LÉPINE, F. (2006)
The Desulfitobacterium genus
Fems Microbiology Reviews , 30, 5, 706-733
LAURIN, V., LABBÉ, N., JUTEAU, P., PARENT, S. & VILLEMUR, R. (2006)
Long-term storage conditions for carriers with denitrifying biomass of the fluidized, methanol-fed denitrification reactor of the Montreal Biodome, and the impact on denitrifying activity and bacterial population
Water Research , 40, 9, 1836-40
GAUTHIER, A., BEAUDET, R., LÉPINE, F., JUTEAU, P. & VILLEMUR, R. (2006)
Occurrence and expression of crdA and cprA5 encoding chloroaromatic reductive dehalogenases in Desulfitobacterium strains
Canadian Journal of Microbiology , 52, 1, 47-55
DUPLA, M., COMEAU, Y., PARENT, S., VILLEMUR, R. & JOLICOEUR, M. (2006)
Design optimization of a self-cleaning moving-bed bioreactor for seawater denitrification
Water Research , 40, 2, 249-258
VILLEMUR, R. & DÉZIEL, E. (2005)
Phase variation and antigenic variation
Advances in Molecular and Cellular Microbiology , 8, Dynamic Bacterial Genome, 277-321
VILLEMUR, R., BEAUDET, R., LANTHIER, M., GAUTHIER, A., BOYER, A., THIBODEAU, J., LÉPINE, F., DUGUAY, M. & PAGE-BELANGER, R. (2005)
Molecular analysis of Desulfitobacterium frappieri pcp-1 involved in reductive dehalogenation of pentachlorophenol
Water Science and Technology , 52, 1-2, 101-106
MARTELLINI, A., PAYMENT, P. & VILLEMUR, R. (2005)
Use of eukaryotic mitochondrial DNA to differentiate human, bovine, porcine and ovine sources in fecally contaminated surface water
Water Research , 39, 4, 541-548
LANTHIER, M., JUTEAU, P., LÉPINE, F., BEAUDET, R. & VILLEMUR, R. (2005)
Desulfitobacterium hafniense is present in a high proportion within the biofilms of a high-performance pentachlorophenol-degrading, methanogenic fixed-film reactor
Applied and Environmental Microbiology , 71, 2, 1058-1065
LABELLE, M. A., JUTEAU, P., JOLICOEUR, M., VILLEMUR, R., PARENT, S. & COMEAU, Y. (2005)
Seawater denitrification in a closed mesocosm by a submerged moving bed biofilm reactor
Water Research , 39, 14, 3409-3417
JUTEAU, P., TREMBLAY, D., VILLEMUR, R., BISAILLON, J. G. & BEAUDET, R. (2005)
Erratum: Analysis of the bacterial community inhabiting an aerobic thermophilic sequencing batch reactor (AT-SBR) treating swine waste (Applied Microbiology and Biotechnology (2004) 66 (115-122) DOI: 10.1007/s00253-004-1692- 5)
Applied Microbiology and Biotechnology , 67, 2, 287
JUTEAU, P., TREMBLAY, D., VILLEMUR, R., BISAILLON, J. G. & BEAUDET, R. (2005)
Analysis of the bacterial community inhabiting an aerobic thermophilic sequencing batch reactor (AT-SBR) treating swine waste. [Erratum to document cited in CA142:203547]
Applied Microbiology and Biotechnology , 67, 2, 287
JUTEAU, P., COTE, V., DUCKETT, M. F., BEAUDET, R., LÉPINE, F., VILLEMUR, R. & BISAILLON, J. G. (2005)
Cryptanaerobacter phenolicus gen. nov., sp nov., an anaerobe that transforms phenol into benzoate via 4-hydroxybenzoate
International Journal of Systematic and Evolutionary Microbiology , 55, Pt 1, 245-250
CONSTANT, P., POISSANT, L. & VILLEMUR, R. (2005)
[Impact de la variation du niveau d’eau d’un marais du lac Saint-Pierre (Québec, Canada) sur les concentrations et les flux d’hydrogène, monoxyde de carbone, méthane et dioxyde de carbone ] Water level fluctuations of a Lake Saint-Pierre wetland’s (Québec, Canada) and their impact on hydrogen, carbon monoxide, methane and carbon dioxide tropospheric concentrations and fluxes.
Revue des Sciences de l’Eau , 18, 4, 521-539
BORDAS, F., LAFRANCE, P. & VILLEMUR, R. (2005)
Conditions for effective removal of pyrene from an artificially contaminated soil using Pseudomonas aeruginosa 57SJ rhamnolipids
Environmental Pollution , 138, 1, 69-76
THIBODEAU, J., GAUTHIER, A., DUGUAY, M., VILLEMUR, R., LEPINE, F., JUTEAU, P. & BEAUDET, R. (2004)
Purification, cloning, and sequencing of a 3,5-dichlorophenol reductive dehalogenase from Desulfitobacterium frappieri PCP-1
Applied and Environmental Microbiology , 70, 8, 4532-4537
LABBE, N., PARENT, S. & VILLEMUR, R. (2004)
Nitratireductor aquibiodomus gen. nov., sp nov., a novel alpha-proteobacterium from the marine denitrification system of the Montreal Biodome (Canada)
International Journal of Systematic and Evolutionary Microbiology , 54, 269-273
JUTEAU, P., TREMBLAY, D., VILLEMUR, R., BISAILLON, J. G. & BEAUDET, R. (2004)
Analysis of the bacterial community inhabiting an aerobic thermophilic sequencing batch reactor (AT-SBR) treating swine waste
Applied Microbiology and Biotechnology , 66, 1, 115-122
HUTCHINSON, J., RUNGE, W., MULVEY, M., NORRIS, G., YETMAN, M., VALKOVA, N., VILLEMUR, R. & LEPINE, F. (2004)
Burkholderia cepacia Infections Associated with Intrinsically Contaminated Ultrasound Gel: The Role of Microbial Degradation of Parabens
Infection Control and Hospital Epidemiology , 25, 4, 291-296
LABBÉ, N., PARENT, S. & VILLEMUR, R. (2003)
Addition of trace metals increases denitrification rate in closed marine systems
Water Research , 37, 4, 914-920
LABBÉ, N., JUTEAU, P., PARENT, S. & VILLEMUR, R. (2003)
Bacterial diversity in a marine methanol-fed denitrification reactor at the Montreal biodome, Canada
Microbial Ecology , 46, 1, 12-21
JUTEAU, P., BISAILLON, J. G., LÉPINE, F., RATHEAU, V., BEAUDET, R. & VILLEMUR, R. (2003)
Improving the biotreatment of hydrocarbons-contaminated soils by addition of activated sludge taken from the wastewater treatment facilities of an oil refinery
Biodegradation , 14, 1, 31-40
GAUTHIER, E., DÉZIEL, E., VILLEMUR, R., JUTEAU, P., LÉPINE, F. & BEAUDET, R. (2003)
Initial characterization of new bacteria degrading high-molecular weight polycyclic aromatic hydrocarbons isolated from a 2-year enrichment in a two-liquid-phase culture system
Journal of Applied Microbiology , 94, 2, 301-311
DÉZIEL, E., LÉPINE, F., MILOT, S. & VILLEMUR, R. (2003)
rhlA is required for the production of a novel biosurfactant promoting swarming motility in Pseudomonas aeruginosa: 3-(3-hydroxyalkanoyloxy)alkanoic acids (HAAs), the precursors of rhamnolipids
Microbiology , 149, 8, 2005-2013
BOYER, A., PAGÉ-BÉLANGER, R., SAUCIER, M., VILLEMUR, R., LÉPINE, F., JUTEAU, P. & BEAUDET, R. (2003)
Purification, cloning and sequencing of an enzyme mediating the reductive dechlorination of 2,4,6-trichlorophenol from Desulfitobacterium frappieri PCP-1
Biochemical Journal , 373, 297-303
VILLEMUR, R., SAUCIER, M., GAUTHIER, A. & BEAUDET, R. (2002)
Occurrence of several genes encoding putative reductive dehalogenases in Desulfitobacterium hafniense/frappieri and Dehalococcoides ethenogenes
Canadian Journal of Microbiology , 48, 8, 697-706
VILLEMUR, R., SAUCIER, M., GAUTHIER, A. & BEAUDET, R. (2002)
Erratum: Occurrence of several genes encoding putative reductive dehalogenases in Desulfitobacterium hafniense/frappieri and Dehalococcoides ethenogenes (Canadian Journal of Microbiology (2002) 48 (697-706))
Canadian Journal of Microbiology , 48, 10, 945
VALKOVA, N., LÉPINE, F., BOLLET, C., DUPONT, M. & VILLEMUR, R. (2002)
prbA, a gene coding for an esterase hydrolyzing parabens in Enterobacter cloacae and Enterobacter gergoviae strains
Journal of Bacteriology , 184, 18, 5011-5017
MCLAUGHLIN, R. W., VALI, H., LAU, P. C. K., PALFREE, R. G. E., DE CICCIO, A., SIROIS, M., AHMAD, D., VILLEMUR, R., DESROSIERS, M. & CHAN, E. C. S. (2002)
Are there naturally occurring pleomorphic bacteria in the blood of healthy humans?
Journal of Clinical Microbiology , 40, 12, 4771-4775
LÉPINE, F., DÉZIEL, E., MILOT, S. & VILLEMUR, R. (2002)
Liquid chromatographic/mass spectrometric detection of the 3-(3-hydroxyalkanoyloxy)alkanoic acid precursors of rhamnolipids in Pseudomonas aeruginosa cultures
Journal of Mass Spectrometry , 37, 1, 41-46
LANTHIER, M., TARTAKOVSKY, B., VILLEMUR, R., DELUCA, G. & GUIOT, S. R. (2002)
Microstructure of anaerobic granules bioaugmented with Desulfitobacterium frappieri PCP-1
Applied and Environmental Microbiology , 68, 8, 4035-4043
GUIOT, S. R., TARTAKOVSKY, B., LANTHIER, M., LEVESQUE, M. J., MANUEL, M. F., BEAUDET, R., GREER, C. W. & VILLEMUR, R. (2002)
Strategies for augmenting the pentachlorophenol degradation potential of UASB anaerobic granules
Water Science and Technology , 45, 10, 35-41
GAUTHIER, C., ST-PIERRE, Y. & VILLEMUR, R. (2002)
Rapid antimicrobial susceptibility testing of urinary tract isolates and samples by flow cytometry
Journal of Medical Microbiology , 51, 3, 192-200