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See detailValidating the Chips 4 Life test
MELIN, Pierrette ULg; IEVEN, Greet

Scientific conference (2015, June 29)

Chips4Life aimed to develop a multiplex diagnostic test that will help clinicians to rapidly establish the agents responsible for a respiratory pathology in patients.This final workshop aims to present ... [more ▼]

Chips4Life aimed to develop a multiplex diagnostic test that will help clinicians to rapidly establish the agents responsible for a respiratory pathology in patients.This final workshop aims to present the main results of this interdisciplinary project and demonstrate the different techniques, technology and expertise required to produce and validate tests, as well as the challenges met and how they were solved. The consortium’s experts in micfrofluidics, molecular biology and microbiological diagnosis will provide an overview on how to conceptualize, develop and manufacture microfluidic chips for clinical applications. [less ▲]

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See detailPrevention of GBS disease - "Relevantie van moleculaire testen voor de screening van GBS"
MELIN, Pierrette ULg

Scientific conference (2015, May 18)

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See detailEpidemiological aspects and genotypic characterization of strains of Microsporum audouinii isolated in the context of a Belgian National survey on anthropophilic tinea
SACHELI, Rosalie ULg; Dekkers, Charlotte; DARFOUF, Rajae ULg et al

Poster (2015, May)

Objectives The last two years, clinical cases of tinea capitis caused by Microsporum audouinii (M. audouinii), have increased in Belgium. To better understand the emergence of this species in the ... [more ▼]

Objectives The last two years, clinical cases of tinea capitis caused by Microsporum audouinii (M. audouinii), have increased in Belgium. To better understand the emergence of this species in the population, the Belgian National Reference Center (NRC) for dermatophytes launched a national survey in 2013. Epidemiological aspects and genotypic characterization of the strains were included. Methods The study was conducted from March 2013 up to February 2014. All Belgian laboratories were asked to send M. audouinii strains isolated from hair to the NRC with a form to fill in including epidemiological informations. The fungal strains were identified by microscopy or ITS sequencing in case of doubt. The genotypic analysis was performed by the DiversiLab® system (bioMérieux) for DNA fingerprinting and analysis. Epidemiological informations were analyzed with the help of a biostatistician. Results Among the collected isolates, 117 strains have been currently confirmed as M. audouinii. Analysis of the epidemiological characteristics of the infected population shows that the main age category concerns 5-9 year-old children (64%, p< 0,0001) with a sex-ratio M/F of 1.97. Data concerning the geographic origin of the family have been obtained in only 33,6% of the cases. It reveals that strains have been mainly isolated from patients with a Belgian nationality (43,6%) suggesting bias in the data collection. The geographic origin of the remaining group includes several African countries such as Congo (20,61%), Guinea (12,8%) and Burundi (5,12%). The genotypic analysis led to the distinction of 6 genotypic variants of M. audouinii. One of these variants was exclusively recovered from South Belgium (11 strains). The major group was composed of 96 strains, well distributed in different Belgium locations. Two other groups of three strains each were close to the major group but the analysis of the spectral superposition showed some differences between these groups. The two last groups were clearly different from the major group but species identification was confirmed by ITS sequencing. Conclusion The results of the genomic analysis by Diversilab, show that several groups of M. audouinii isolates co-exist in Belgium providing evidence of genetic heterogeneity. However, no clear correlation could be established between the appartenance to a group and epidemiological factors, such as the age or ethnical origin. ________________________________________ [less ▲]

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See detailEpidemiological aspects and genotypic characterization of strains of Microsporum audouinii isolated in the context of a Belgian National survey on anthropophilic tinea
SACHELI, Rosalie ULg; Géron, Bénédicte; Dekkers, Charlotte et al

Poster (2015, April 28)

Objectives The last two years, clinical cases of tinea capitis caused by Microsporum audouinii (M. audouinii), have increased in Belgium. To better understand the emergence of this species in the ... [more ▼]

Objectives The last two years, clinical cases of tinea capitis caused by Microsporum audouinii (M. audouinii), have increased in Belgium. To better understand the emergence of this species in the population, the Belgian National Reference Center (NRC) for dermatophytes launched a national survey in 2013. Epidemiological aspects and genotypic characterization of the strains were included. Methods The study was conducted from March 2013 up to February 2014. All Belgian laboratories were asked to send M. audouinii strains isolated from hair to the NRC with a form to fill in including epidemiological informations. The fungal strains were identified by microscopy or ITS sequencing in case of doubt. The genotypic analysis was performed by the DiversiLab® system (bioMérieux) for DNA fingerprinting and analysis. Epidemiological informations were analyzed with the help of a biostatistician. Results Among the collected isolates, 97 strains have been currently confirmed as M. audouinii. Preliminary analysis of the epidemiological characteristics of the infected population shows that the main age category concerns 5-9 year-old children (84%) with a sex-ratio M/F of 1.95. Data concerning the geographic origin of the family have been obtained in only 45.8% of the cases. It reveals that strains have been mainly isolated from patients with a Belgian nationality (77%) suggesting bias in the data collection. The geographic origin of the remaining group (23%) includes several African countries. The genotypic analysis led to the distinction of 3 genotypic variants of M. audouinii. One of these variants was exclusively recovered from South Belgium (11 strains). The major group was composed of 85 strains, well distributed in different Belgium locations. The last group contains only one strain but this strain was significantly different from the two other variants. Conclusion The automated typing DiversiLab® system proved to be an easy and efficient method to investigate the molecular epidemiology of dermatophytes infections. These preliminary results show that, through Belgium, several groups of isolates co-exist for M. audouinii providing evidence of genetic heterogeneity. At this time all epidemiological informations have not yet been assessed while 35 strains of M. audouinii remain to be analysed genotypically to give definitive conclusions. [less ▲]

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See detailScreening for GBS colonization: Old and new tools
MELIN, Pierrette ULg

in Program and abstract book DIP 2015 (2015, April)

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See detailPrevention of GBS disease: Perspective of a GBS vaccine
MELIN, Pierrette ULg

Conference (2015, March 13)

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See detailGBS Prévention: Nouveaux outils & stratégies attendues
MELIN, Pierrette ULg

Scientific conference (2015, February 24)

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See detailTowards a European consensus for prevention of GBS neonatal disease: old and new tools
MELIN, Pierrette ULg

in Abstract book of the 30th Scientific seminar on Infectious Diseases (2014, November 27)

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See detailDISTRIBUTION OF CAPSULAR POLYSACCHARIDES OF STREPTOCOCCUS AGALACTIAE STRAINS FROM URUGUAY. MULTIPLEX PCR VERSUS CONVENTIONAL CAPSULAR SEROTYPING
Rodriguez Cuns, Grisel ULg; BOREUX, Raphaël ULg; ADAMS, Pauline et al

in XIX Lancefield International Symposium on Streptococci and Streptococcal Diseases, Program and Abstract book (2014, November 11)

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See detailGBS and antibiotic resistance: threat to therapy
MELIN, Pierrette ULg

in XIX Lancefield International Symposium on Streptococci and Streptococcal Diseases, Program and Abstract book (2014, November)

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See detailA practical approach to the microbiological diagnosis of infectious keratitis
MELIN, Pierrette ULg

Conference (2014, October 11)

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See detailManagement of the neonate at risk for early-onset Group B streptococcal disease (GBS EOD): new paediatric guidelines in Belgium
MAHIEU, Ludo; LANGHENDRIES, Jean Paul; COSSEY, Veerle et al

in Acta Clinica Belgica (2014), 69(5), 313-319

Despite group B streptococcal (GBS) screening in late pregnancy and intrapartum antimicrobial prophylaxis, early onset sepsis in neonates remains a common source of neonatal morbidity and mortality ... [more ▼]

Despite group B streptococcal (GBS) screening in late pregnancy and intrapartum antimicrobial prophylaxis, early onset sepsis in neonates remains a common source of neonatal morbidity and mortality especially in preterm neonates. The identification of neonates with early onset sepsis is usually based on perinatal risk factors. Clinical signs are aspecific and laboratory tests not sensitive. Therefore, many clinicians will overtreat at risk infants. Inappropriate treatment with antibiotics increases the risk for late onset sepsis, necrotizing enterocolitis, mortality and prolongs hospitalisation and costs. In 2003, the Belgian Health Council (BHC), published guidelines for the prevention of perinatal GBS infections. This report presents the Belgian paediatric management guidelines, which have been endorsed by the Belgian and Flemish societies of neonatology and paediatrics. The most imported changes in the 2014 guidelines are the following: · recommendations for a lumbar puncture, · clarification of normal spinal fluid parameters and blood neutrophil indices corrected for gestation age, · specific timing for diagnostic testing after birth, · no indication for diagnostic testing in asymptomatic newborns unless additional risk factors, · a revised algorithm for management of neonates according to maternal and neonatal risk factors, · premature infants described as those below 35 weeks instead of 37 weeks The guidelines were made on the basis of the best evidence and on expert opinion when inadequate evidence exists. [less ▲]

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See detailInfections sexuellement transmissibles et rapports à risque ...
Melin, Pierrette ULg

Scientific conference (2014, September 20)

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See detailIntrapartum GBS screening and antibiotic prophylaxis: a European consensus conference
DI RENZO, Gian Carlo; MELIN, Pierrette ULg; BERARDI, Alberto et al

in The Journal of Maternal-Fetal & Neonatal Medecine (2014)

Group B streptococcus (GBS) remains worldwide a leading cause of severe neonatal disease. Since the end of the 1990s, various strategies for prevention of the early onset neonatal disease have been ... [more ▼]

Group B streptococcus (GBS) remains worldwide a leading cause of severe neonatal disease. Since the end of the 1990s, various strategies for prevention of the early onset neonatal disease have been implemented and have evolved. When a universal antenatal GBS screening-based strategy is used to identify women who are given an intrapartum antimicrobial prophylaxis, a substantial reduction of incidence up to 80% has been reported in the USA as in other countries including European countries. However recommendations are still a matter of debate due to challenges and controversies on how best to identify candidates for prophylaxis and to drawbacks of intrapartum administration of antibiotics. In Europe, some countries recommend either antenatal GBS screening or risk-based strategies, or any combination, and others do not have national or any other kind of guidelines for prevention of GBS perinatal disease. Furthermore, accurate population-based data of incidence of GBS neonatal disease are not available in some countries and hamper good effectiveness evaluation of prevention strategies. To facilitate a consensus towards European guidelines for the management of pregnant women in labor and during pregnancy for the prevention of GBS perinatal disease, a conference was organized in 2013 with a group of experts in neonatology, gynecology- obstetrics and clinical microbiology coming from European representative countries. The group reviewed available data, identified areas where results were suboptimal, where revised procedures and new technologies could improve current practices for prevention of perinatal GBS disease. The key decision issued after the conference is to recommend intrapartum antimicrobial prophylaxis based on a universal intrapartum GBS screening strategy using a rapid real time testing. [less ▲]

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See detailStreptococcus agalactiae clones infecting humans were selected and fixed through the extensive use of tetracycline
Da Cunha, Violette; Davies, MR; Douarre, Pierre-Emmanuel et al

in Nature Communications (2014)

Streptococcus agalactiae (Group B Streptococcus, GBS) is a commensal of the digestive and genitourinary tracts of humans that emerged as the leading cause of bacterial neonatal infections in Europe and ... [more ▼]

Streptococcus agalactiae (Group B Streptococcus, GBS) is a commensal of the digestive and genitourinary tracts of humans that emerged as the leading cause of bacterial neonatal infections in Europe and North America during the 1960s. Due to the lack of epidemiological and genomic data, the reasons for this emergence are unknown. Here we show by com- parative genome analysis and phylogenetic reconstruction of 229 isolates that the rise of human GBS infections corresponds to the selection and worldwide dissemination of only a few clones. The parallel expansion of the clones is preceded by the insertion of integrative and conjugative elements conferring tetracycline resistance (TcR). Thus, we propose that the use of tetracycline from 1948 onwards led in humans to the complete replacement of a diverse GBS population by only few TcR clones particularly well adapted to their host, causing the observed emergence of GBS diseases in neonates. [less ▲]

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See detailPrevention of perinatal group B streptococcal infection: situation and new laboratory strategies
MELIN, Pierrette ULg

Scientific conference (2014, June 19)

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See detailWhat’s new in group B streptococcus screening and guidelines ?
MELIN, Pierrette ULg

Conference (2014, June 14)

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