Publications by authors named "Duquesne F"

In 2018, a T. asinigenitalis strain (MCE663) was isolated in a Persian onager tested for contagious equine metritis (CEM) in a United Kingdom (UK) zoo. This bacterium had never been reported in the UK and Multilocus Sequence Typing described a new atypically divergent ST (ST60).

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Article Synopsis
  • - The European Union and World Organisation for Animal Health now endorse real-time PCR as an effective method for detecting contagious equine metritis (CEM), alongside traditional culture methods.
  • - A network of 20 approved laboratories in France was established in 2017 to conduct CEM detection via real-time PCR, with ongoing proficiency tests initiated to evaluate their performance.
  • - From 2017 to 2021, proficiency tests showed that 99.20% of qualitative results were accurate, highlighting that direct lysis DNA extraction yielded more favorable results than other methods, although the differences were not statistically significant.
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The cultural diagnosis of the causal agent of contagious equine metritis (Taylorella equigenitalis) using transport swabs is challenging. Swabs must be placed in Amies charcoal medium, refrigerated during transport, and plated out at the laboratory no later than 48 h after sampling. In this study, the viability of T.

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Background: Three horse mares inadvertently inseminated with semen from a Tayorella asinigenitalis-positive Jack donkey developed severe, purulent endometritis whereas two Jenny donkeys mated naturally to the same Jack donkey did not develop clinical signs of infection.

Objectives: To isolate and identify the causative agent.

Study Design: Case report.

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Objectives: Study of the rifampicin resistance of Rhodococcus equi strains isolated from French horses over a 20-year period.

Methods: Rifampicin susceptibility was tested by disk diffusion (DD) and broth macrodilution methods, and rpoB gene sequencing and MLST were performed on 40 R. equi strains, 50.

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We present here a series of 6 infants hospitalized for coronavirus disease 2019 infection from March 14 to March 30, 5 of them are newborns. All 6 patients presented with fever, it was the main symptom for all of them. Only one of them needed oxygen; the others were hospitalized for surveillance but did not need specific care.

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The accurate identification of Taylorella equigenitalis strains is essential to improve worldwide prevention and control strategies for contagious equine metritis (CEM). This study compared 367 worldwide equine strains using multilocus sequence typing according to the geographical origin, isolation year and equine breed. The strains were divided into 49 sequence types (STs), including 10 described for the first time.

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Taylorella equigenitalis can be transmitted during artificial insemination. This report describes clinical T. equigenitalis transmission by cryopreserved stallion semen.

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Misidentification between Taylorella equigenitalis, the causative agent of contagious equine metritis (CEM), and Taylorella asinigenitalis is observed by the gold standard culture method. The performance of matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) for Taylorella species identification was evaluated using 85 T. equigenitalis and 28 T.

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The present study reports the isolation of A. hippocoleae from genital swabs of 15 apparently healthy mares (at least one had an abortion one month earlier) and describes the genotypic and phenotypic characterisation of these strains. The mares were of eight different breeds with a thoroughbred dominance and came from 11 breeding farms located in the French region of Brittany.

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The performance of culture and PCR methods routinely used to diagnose contagious equine metritis (CEM) was evaluated and compared by two interlaboratory trials involving a total of 24 European laboratories, including 22 National Reference Laboratories for CEM. Samples were swab specimens artificially contaminated with bacteria present in the genital tract of Equidae, some with and some without , the causative agent of CEM, and , responsible for possible misidentification as Throughout both interlaboratory trials, PCR performed better in terms of specificity and sensitivity than the culture method, supporting the assertion that PCR should be accepted for CEM diagnosis. However, the culture performance during the second interlaboratory trial was better than during the first one, suggesting that the expertise of participants improved.

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Rhodococcus equi causes pulmonary and extrapulmonary infections in animals and humans, with endemic situations and significant young foal mortality in stud farms worldwide. Despite its economic impact in the horse-breeding industry, the broad geographic and host distribution, global diversity and population structure of R. equi remain poorly characterised.

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Taylorella equigenitalis is the causative agent of contagious equine metritis (CEM), a sexually transmitted infection of horses. We herein report the genome sequence of T. equigenitalis strain MCE529, isolated in 2009 from the urethral fossa of a 15-year-old Belgian Warmblood horse in France.

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Article Synopsis
  • A study was conducted to assess the pharmacokinetics of vancomycin in children with malignant hematological diseases, aiming to improve dosing strategies since adult data suggested higher doses might be effective.
  • Despite the current dosing recommendation of 40 to 60 mg/kg/day, 76% of the 70 children studied had trough concentrations lower than the therapeutic threshold, indicating they were underdosed.
  • The research developed a one-compartment pharmacokinetic model that considers factors like weight and kidney function, leading to a tailored dosing regimen that improved the number of patients achieving the target vancomycin levels and reduced the risks of both underdosing and overdosing.
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We describe here the development of a multilocus sequence typing (MLST) scheme for Taylorella equigenitalis, the causative agent of contagious equine metritis (CEM), and Taylorella asinigenitalis, a nonpathogenic bacterium. MLST was performed on a set of 163 strains collected in several countries over 35 years (1977-2012). The MLST data were analyzed using START2, MEGA 5.

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The Taylorella genus comprises two species: Taylorella equigenitalis, which causes contagious equine metritis, and Taylorella asinigenitalis, a closely-related species mainly found in donkeys. We herein report on the first genome sequence of T. asinigenitalis, analyzing and comparing it with the recently-sequenced T.

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Taylorella equigenitalis is the causative agent of contagious equine metritis (CEM), a sexually transmitted infection of horses. We herein report the genome sequence of T. equigenitalis strain MCE9, isolated in 2005 from the urethral fossa of a 4-year-old stallion in France.

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The objective of this study was to examine the degree of phenotypic and genotypic diversity between 43 French Taylorella asinigenitalis strains isolated from 22 jacks, two stallions and one mare between 1995 and 2008 by culturing genital swabs obtained during routine diagnosis for contagious equine metritis. This retrospective analysis revealed the existence of T. asinigenitalis species since 1995 and the natural colonization of a mare's genital tract in 2001.

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Article Synopsis
  • - The study analyzed 96 strains of Rhodococcus equi from autopsied horses, organic samples, and environmental samples to explore the link between virulence plasmids and the strains' origins.
  • - No significant epidemiological link was found between the types of virulence plasmids and the R. equi strains' sources, indicating potential random distribution.
  • - The comparison of two prominent plasmids revealed genetic divergence due to allelic exchanges, with implications on the evolutionary process that may not correlate with the known pathogenicity factors.
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Contagious equine metritis is a horse disease that causes endometrial inflammation due to Taylorella equigenitalis. Since Taylorella asinigenitalis was characterized, genital swab culture has proved to be an insufficient method for distinguishing between the two Taylorella species. Here, we developed an indirect immunofluorescence (IIF) test using polyclonal antibodies.

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Unlabelled: Haemolytic and uremic syndrome (HUS) is the most frequent cause of pediatric acute renal failure. It occurs classically after a diarrhea due to Escherichia coli, seldom in the context of pneumococcus infection. HUS due to pneumococcus has epidemiologic, therapeutic and prognostic characteristics.

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Unlabelled: By now Lemierre's syndrome is a seldom-described disease whose prognosis depends on the precocity of treatment.

Case Presentation: We report the case of an 11-month-old child, with a fulminant Fusobacterium necrophorum meningitis, which derived from a gingival infection, with fatal outcome.

Conclusion: This atypical case of Lemierre's syndrome (young age occurrence and localisation) underlines the potential severity of F.

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