Klebsiella pneumoniae ST258 Negatively Regulates the Oxidative Burst in Human Neutrophils

In conclusion, we unraveled a mechanism of immune evasion of Kpn KPC ST258, which may contribute to design more effective strategies for the treatment of these multi-resistant bacterial infections. Introduction Klebsiella pneumoniae (Kpn) is a Gram-negative pathogen causing a wide range of infections from urinary tract infections to pneumonia. Kpn is a member of the so-called ESKAPE group of microorganisms, a term that emphasizes the fact that they effectively “escape” the effects of antibacterial drugs (1). Antimicrobial resistance is a significant problem for the treatment of infectious diseases caused by resistant bacteria worldwide. Specifically, resistance to carbapenems, the antibiotics of last resort for life-threatening bacterial infections, has significantly increased mortality and morbidity in patients hospitalized in intensive care units or in long-term care facilities (2). As an example, mortality in patients suffering from bacteriemia or pulmonary infections caused by carbapenem-resistant Kpn strains ranges between ~30 and 70% (3). A clinically relevant Kpn clone has been genetically classified as multilocus sequence type 258 (ST258), which is a hyper-epidemic clone responsible for the global dispersion of carbapenem resistance. This resistance is conferred by an enzyme known as Kpn-Carbapenemase (KPC) (3), and the strains belonging to the ST258 are also resistant to all β-lactam antibiotics and generally contain additional resistance genes...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research

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Source: BMJ Comments - Category: General Medicine Source Type: forums
Publication date: Available online 19 February 2020Source: The Brazilian Journal of Infectious DiseasesAuthor(s): Valéria Cataneli Pereira, Letícia Calixto Romero, Luiza Pinheiro-Hubinger, Adilson Oliveira, Katheryne Benini Martins, Maria de Lourdes Ribeiro de Souza da CunhaAbstractThe increasing rates of nosocomial infection associated with coagulase–negative staphylococci (CoNS) were the rationale for this study, aiming to categorize oxacillin–resistant CoNS species recovered from blood culture specimens of inpatients at the UNESP Hospital das Clínicas in Botucatu, Brazil, over a 20&ndash...
Source: The Brazilian Journal of Infectious Diseases - Category: Infectious Diseases Source Type: research
Publication date: Available online 19 February 2020Source: Microbial PathogenesisAuthor(s): Ali Dalir Ghaffari, Abdolhossein Dalimi, Fatemeh Ghaffarifar, Majid PirestaniAbstractToxoplasmosis, caused by Toxoplasma gondii, is a common parasitic disease, affecting almost one-third of the world's population. Currently, there are no effective treatments for inhibiting the formation of chronic tissue cysts in infected hosts. Thus, the production of appropriate vaccines against this pathogen is an important goal to avoid toxoplasmosis. considering the role of rhoptry antigens like ROP16 in virulence and satisfactory immunogenicit...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
Publication date: Available online 19 February 2020Source: Journal of Global Antimicrobial ResistanceAuthor(s): Zhenwei Yu, Lingyan Yu, Jianping Zhu
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
ConclusionsA. baumannii ST2 producing 16S rRNA methylase ArmA has been spreading in medical settings in Myanmar.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
ConclusionOverexpression in efflux pump transporter genes together with mutations in ERG11 pave the way to fluconazole resistance among C. tropicalis. To the best of our knowledge this is the first study on C. tropicalis fluconazole resistance mechanism from North India region.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
ConclusionTigcycline induced changes in the expression of some related genes in A. baumannii, which may be the main reason for its increased drug resistance.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
Publication date: Available online 18 February 2020Source: Journal of Global Antimicrobial ResistanceAuthor(s): Rayane Rafei, Malaik Hawli, Marwan Osman, Fouad Dabboussi, Monzer HamzeAbstractThis review aimed to provide an updated scenario of the Group A Streptococcus (GAS) epidemiology in the Middle Eastern and North African (MENA) region with a special spotlight on the most prevalent emm types and macrolide resistance profiles. While the burden of invasive GAS infections is elusive to assess in the MENA region, the GAS prevalence ranged from 2.5% to up 42.4% in pharyngitis patients and from 2.4% to up 35.4% in healthy ca...
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
ConclusionsThe findings showed the presence of antibiotic resistance in probiotic bacteria isolated from commercially available dietary supplements. As multidrug resistance is a serious emerging issue and the risk of drug resistant gene transfer to commensals or pathogens of the gut is inevitable, the safety of probiotics has become a major criterion of interest. The findings of this study would serve as a platform for further screening and characterization of the determinants of antibiotic resistance and the genetic mechanisms of resistance.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
ConclusionThe corresponding treatment effect estimate for nitrofurantoin was 26.8%, which supports a conservative non-inferiority margin of 12.5% and is consistent with the recently published draft FDA guidance. The findings from this systematic review and meta-analysis inform future antibacterial trials by providing non-inferiority margin justification.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
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