Open-label, multicenter, multiple-dose, study of population pharmacokinetics of I.V. Synercid (7.5 mg/kg every 8 hours) in 75 pediatric patients. The purpose is to assess the population pharmacokinetics of Synercid in pediatric patients and to collect additional safety and efficacy data in pediatric patients.

Start Date01 Jun 2000

Sponsor / Collaborator

Pfizer Inc.

[+1]

100 Clinical Results associated with Dalfopristin/Quinupristin

100 Translational Medicine associated with Dalfopristin/Quinupristin

100 Patents (Medical) associated with Dalfopristin/Quinupristin

494

Literatures (Medical) associated with Dalfopristin/Quinupristin

01 Nov 2023·Genomics

Resistome, mobilome, virulome analysis and phylogenomics of Enterococcus faecalis isolated from raw muscle foods of beef origin in Gauteng, South Africa

Article

Author: Mafuna, Thendo ; Atanda, Abimbola Comfort ; Pierneef, Rian ; Matle, Itumeleng ; Magwedere, Kudakwashe

Enterococcus faecalis is a ubiquitous bacterium found in various environments, including processed beef meat, and is known for its importance in both food safety and public health. This pivotal significance stems not solely from its virulence but also from its adeptness in eliciting multidrug-resistant infections in humans. The aim of this study was to investigate the population structure, resistome, mobilome, and virulome of E. faecalis obtained from processed beef meat sources in South Africa. A total of eight genomes sequenced in this study were examined, alongside 78 publicly available, high-quality genomes of E. faecalis, with a comprehensive analysis conducted to identify antimicrobial resistance (AMR) determinants, virulence factors, and mobile genetic elements (MGE). Six distinct sequence types (STs) (ST79, ST860, ST40, ST238, ST21, and ST700) and 41 core virulence factors were found across all the genomes. The virulence factors included genes encoding adherence (ace, asa1, Ef0485, ebpA, ebpB, ebpC, srtC); exoenzyme (Ef3023, Ef0818, gelE, sprE); immunomodulation (cpsA, cpsB, cpsC, cpsD, cpsE, cpsF, cpsG, cpsH, cpsI, cpsK), and biofilm formation (bopD, fsrA, fsrB, fsrC). In addition, AMR genes were identified across all genomes, which include aminoglycoside resistance (ant(6)-Ia), trimethoprim resistance (dfrA), drug and biocide resistance (efrA and efrB), multidrug efflux pump (emeA), clindamycin quinupristin-dalfopristin, dalfopristin resistance (lsaA), and tetracycline resistance (tetM). The genomes of E. faecalis sequenced here contained a variety of MGEs, including Insertion Sequences (ISs), transposons, prophages, and plasmids, which may have facilitated genetic exchange within and between these species. The results highlight that beef meat products act as a reservoir for virulent E. faecalis strains possessing antibiotic-resistance traits. This study provides insight into the genomic characteristics, antimicrobial resistance genes, virulence factors, and genetic mobile elements associated with eight E. faecalis isolates from processed beef meat in the Gauteng province of South Africa.

07 Jun 2023·Animals : an open access journal from MDPI

Analysis of Antibiotic-Resistant and Virulence Genes of Enterococcus Detected in Calf Colostrum-One Health Perspective.

Article

Author: Silva, Filipe ; Martins, Ângela ; Soares, Rúben ; Maia, Manuel ; Igrejas, Gilberto ; Cunha, Sandra ; Poeta, Patrícia ; Miranda, Carla

Enterococci are considered among the most prevalent global multidrug-resistant microorganisms globally. Their dissemination is a global concern, particularly by food-producing animals for both animals and humans. The aim of this study was to identify the species and investigate the antibiotic resistance and virulence profile of Enterococcus in bovine colostrum. Out of 88 presumptive Enterococcus isolates, species identification and susceptibility to 14 antimicrobials were tested using the disk diffusion method. An analysis of the antibiotic resistance and virulence genes was performed on the most prevalent species, using specific PCR assays. Enterococcus faecalis (54.5%), E. faecium (14.8%) and E. gallinarum (6.8%) were the identified species. To the best of our knowledge, this is the first report of E. gallinarum in bovine colostrum. The majority of the isolates showed resistance to quinupristin-dalfopristin (95.9%), erythromycin (80.7%), tetracycline (80.7%) and streptomycin (58%). Ninety-two percent of isolates were classified as multidrug-resistant. The most frequently detected resistance genes were tet(K) (61.1%), tet(M) (75.9%), tet(L) (90.7%), erm(B) (55.6%) and ant(6)-Ia (46.3%). The most prevalent virulence factors were cpd, esp, agg and cylL_L. Enterococcus faecium showed a higher probability of carrying the erm(C), tet(M), ace and gel(E) genes (p < 0.05). These results demonstrated that colostrum can constitute an important reservoir and vehicle for the dissemination of antibiotic resistance and virulence genes to the three niches included in a One Health perspective (humans, animals and the environment), highlighting the importance of hygiene sanitary measures to mitigate colostrum microbial contamination.

01 Jun 2023·Enfermedades infecciosas y microbiologia clinica (English ed.)

Reporting antimicrobial susceptibilities and phenotypes of resistance to vancomycin in vancomycin-resistant Enterococcus spp. clinical isolates: A nationwide proficiency study

Article

Author: Gimeno, Concepción ; Fernández-Cuenca, Felipe ; Conejo, María Carmen ; Pascual, Alvaro ; López-Hernández, Inmaculada ; Tormo, Nuria ; Cercenado, Emilia

INTRODUCTIONThe ability of Spanish microbiology laboratories to (a) determine antimicrobial susceptibility (AS), and (b) correctly detect the vancomycin resistance (VR) phenotype in vancomycin-resistant Enterococcus spp. (VRE) was evaluated.METHODSThree VRE isolates representing the VanA (E. faecium), VanB (E. faecium) and VanC (E. gallinarum) VR phenotypes were sent to 52 laboratories, which were asked for: (a) AS method used; (b) MICs of ampicillin, imipenem, vancomycin, teicoplanin, linezolid, daptomycin, ciprofloxacin, levofloxacin and quinupristin-dalfopristin, and high-level resistance to gentamicin and streptomycin; (c) VR phenotype.RESULTS(a) The most frequently used system was MicroScan; (b) according to the system, the highest percentage of discrepant MICs was found with gradient strips (21.3%). By antimicrobial, the highest rates of discrepant MICs ranged 16.7% (imipenem) to 0.7% (linezolid). No discrepant MICs were obtained with daptomycin or levofloxacin. Mayor errors (MEs) occurred with linezolid (1.1%/EUCAST) and ciprofloxacin (5.0%/CLSI), and very major errors (VMEs) with vancomycin (27.1%/EUCAST and 33.3%/CLSI) and teicoplanin (5.7%/EUCAST and 2.3%/CLSI). For linezolid, ciprofloxacin, and vancomycin, discrepant MICs were responsible for these errors, while for teicoplanin, errors were due to a misassignment of the clinical category. An unacceptable high percentage of VMEs was obtained using gradient strips (14.8%), especially with vancomycin, teicoplanin and daptomycin; (c) 86.4% of the centers identified VanA and VanB phenotypes correctly, and 95.0% the VanC phenotype.CONCLUSIONMost Spanish microbiology laboratories can reliably determine AS in VRE, but there is a significant percentage of inadequate interpretations (warning of false susceptibility) for teicoplanin in isolates with the VanB phenotype.

100 Deals associated with Dalfopristin/Quinupristin

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R&D Status

10 top approved records.

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Indication	Country/Location	Organization	Date
Bacteremia	US	King Pharmaceuticals LLC	21 Sep 1999
Complicated skin and skin structure infection	US	King Pharmaceuticals LLC	21 Sep 1999
Vancomycin-resistant enterococcal infection	US	King Pharmaceuticals LLC	21 Sep 1999
Gram-Positive Bacterial Infections	GB	Rhône-Poulenc, Inc.	01 Jul 1999

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