Transendothelial migration of the Lyme disease spirochete involves spirochete internalization as an intermediate step through a transcellular pathway that involves Cdc42 and Rac1.

Unlabelled: Despite its importance in pathogenesis, the hematogenous dissemination pathway of is still largely uncharacterized. To probe the molecular details of transendothelial migration more easily, we studied this process using cultured primary or telomerase-immortalized human microvascular endothelial cells in a medium that maintains both the human cells and the spirochetes. In infected monolayers we observed ∼55% of wild-type spirochetes crossing the monolayer.

sequence type 410 with carbapenemases: a paradigm shift within toward multidrug resistance.

sequence type ST410 is an emerging carbapenemase-producing multidrug-resistant (MDR) high-risk One-Health clone with the potential to significantly increase carbapenem resistance among . ST410 belongs to two clades (ST410-A and ST410-B) and three subclades (ST410-B1, ST410-B2, and ST410-B3). After a switch between clades ST410-A and ST410-B1, ST410-B2 and ST410-B3 subclades showed a stepwise progression toward developing MDR.

CRISPR-Cas9-mediated IncF plasmid curing in extraintestinal pathogenic .

Understanding the role of IncF plasmids in the success of drug-resistant bacteria has far-reaching implications for tackling antibiotic resistance. The study's use of a novel CRISPR-Cas9-mediated plasmid-curing system provides a precision tool for dissecting the specific impact of IncF plasmids on ExPEC clones, especially high-risk, multidrug-resistant strains like ST131, ST1193, and ST410. The study offers a crucial stepping stone for future research into understanding how these plasmids influence more complex aspects of bacterial behavior, such as cell invasion and fitness.

The contributions of multidrug resistant clones to the success of pandemic extra-intestinal Pathogenic .

Introduction: High-risk multidrug (MDR) clones have played essential roles in the global emergence and spread of antimicrobial resistance (AMR), especially among Extra-intestinal (ExPEC).

Areas Covered: Successful global ExPEC MDR clones are linked with the acquisition of fluoroquinolone resistance, CTX-M enzymes, and with carbapenemases. This article described the underlying mechanisms of fluoroquinolone resistance, the acquisition of CTX-M and carbapenemase genes among three global ExPEC high-risk MDR clones, namely i) ST1193 as being an example of a fluoroquinolone resistant clone.

Acquisition of genomic elements were pivotal for the success of Escherichia coli ST410.

Background: Escherichia coli ST410 is an emerging MDR clone linked to blaCTX-M-15 and blaOXA-181. Limited comprehensive data about the global distribution of ST410 clades and mobile genetic elements associated with different β-lactamases are available.

Methods: Short- and long-read WGS were performed on a collection of ST410 producing carbapenemases (n = 45) obtained from 11 countries.

Escherichia coli ST1193: Following in the Footsteps of E. coli ST131.

Escherichia coli ST1193 is an emerging global multidrug (MDR) high-risk clone and an important cause of community-onset urinary and bloodstream infections. ST1193 is imitating E. coli ST131, the most successful MDR clone of all time.

Genomic Epidemiology of Global Carbapenemase-Producing Escherichia coli, 2015-2017.

We describe the global molecular epidemiology of 229 carbapenemase-producing Escherichia coli in 36 countries during 2015-2017. Common carbapenemases were oxacillinase (OXA) 181 (23%), New Delhi metallo-β-lactamase (NDM) 5 (20%), OXA-48 (17%), Klebsiella pneumoniae carbapenemase 2 (15%), and NDM-1 (10%). We identified 5 dominant sequence types (STs); 4 were global (ST410, ST131, ST167, and ST405), and 1 (ST1284) was limited to Turkey.

Population-based epidemiology of Escherichia coli ST1193 causing blood stream infections in a centralized Canadian region.

Escherichia coli ST1193 is an emerging global clone associated with fluoroquinolone resistance. A population-based study described genomics, clinical factors, susceptibility patterns, and incidence rates of ST1193 (n = 69) causing incident blood stream infections in a centralized Canadian region 2016-18. ST1193 was responsible for community-acquired upper urinary tract infections among the elderly.

The importance of Escherichia coli clonal complex 10 and ST131 among Tanzanian patients on antimicrobial resistance surveillance programs.

The objective of this study was to characterize antimicrobial resistance (AMR) of WHO priority 1 critical pathogen (extrapathogenic Escherichia coli (ExPEC), sequence types (STs), and ST131 clades from patients in Tanzania so as to guide specific antimicrobial therapies and preventive measures. A total of 143 ExPEC strains (128 from pregnant women with urinary tract infections and 15 from children with blood stream infections) were collected between March 2016 and October 2017. These were characterized into ST-fimH clones by a 7-single nucleotide polymorphism quantitative polymerase chain reaction (7-SNP qPCR) and gene sequencing, and to ST131 clades by multiplex PCR.

The Lyme disease spirochete can hijack the host immune system for extravasation from the microvasculature.

Lyme disease is the most common tick-transmitted disease in the northern hemisphere and is caused by the spirochete Borrelia burgdorferi and related Borrelia species. The constellation of symptoms attributable to this malady results from vascular dissemination of B. burgdorferi throughout the body to invade various tissue types.

Spatial distribution of Escherichia coli ST131 C subclades in a centralized Canadian urban region.

Introduction: Escherichia coli ST131 is the most common multidrug-resistant (MDR) E. coli clone causing bloodstream infections (BSIs) in Calgary. This study describes patient characteristics and spatial distribution of ST131 subclades C1 and C2 causing BSIs in Calgary.

Trends in Population Dynamics of Escherichia coli Sequence Type 131, Calgary, Alberta, Canada, 2006-2016.

Global expansion of antimicrobial drug-resistant Escherichia coli sequence type (ST) 131 is unrivaled among human bacteria. Understanding trends among ST131 clades will help with designing prevention strategies. We screened E.

A Comprehensive Account of Escherichia coli Sequence Type 131 in Wastewater Reveals an Abundance of Fluoroquinolone-Resistant Clade A Strains.

In the ten years since its discovery, the clone sequence type 131 (ST131) has become a major international health threat, with the multidrug-resistant and extended-spectrum β-lactamase (ESBL)-producing clade C emerging as the globally dominant form. ST131 has previously been isolated from wastewater; however, most of these studies selectively screened for ESBL-producing organisms, thereby missing the majority of remaining ST131 clades. In this study, we used a high-throughput PCR-based screening strategy to comprehensively examine wastewater for the presence of ST131 over a 1-year period.

CKD quality improvement intervention with PCMH integration: health plan results.

Objectives: To execute a chronic kidney disease (CKD) intervention to assess feasibility and preliminary outcomes for a health plan.

Study Design: This CKD quality improvement study was incorporated into an existing CareFirst primary care patient-centered medical home cohort with a pre- and postintervention assessment from July 1, 2015, to June 30, 2017.

Methods: The study targeted the population at risk for CKD with diabetes and/or hypertension by implementing a care plan according to the stratification by estimated glomerular filtration rate (eGFR) and urinary albumin-creatinine ratio (uACR) or CKD heat map class.

Deciphering risk factors for blood stream infections, bacteria species and antimicrobial resistance profiles among children under five years of age in North-Western Tanzania: a multicentre study in a cascade of referral health care system.

Background: Blood stream infections (BSIs) cause a complex cascade of inflammatory events, resulting in significant morbidity and mortality in children in Tanzania. This study was designed to delineate circulating bacterial species, antimicrobial resistance (AMR) profiles and risk factors for BSIs and mortality among children in the cascade of referral health care facilities so as to guide comprehensive BSIs management.

Methods: A multiple cross sectional analytical study was conducted between July 20, 2016 to October 04, 2017 involving 950 children less than five years of age in the North-western part of Tanzania.

Multicentre evaluation of significant bacteriuria among pregnant women in the cascade of referral healthcare system in North-western Tanzania: Bacterial pathogens, antimicrobial resistance profiles and predictors.

Objectives: The aim of this multicentre study was to evaluate the magnitude of significant bacteriuria (SB) as well as the implicated bacterial pathogens, antimicrobial resistance (AMR) profiles and risk factors for SB among pregnant women attending different levels of healthcare facilities (HCFs) in Tanzania in order to guide antimicrobial therapy and preventive measures.

Methods: Information on sociodemographic and clinical characteristics, midstream urine culture and antimicrobial susceptibility testing was collected from 1828 pregnant women between March 2016 and May 2017. Data were analysed using STATA v.

Sex-hormone-driven innate antibodies protect females and infants against EPEC infection.

Females have an overall advantage over males in resisting Gram-negative bacteremias, thus hinting at sexual dimorphism of immunity during infections. Here, through intravital microscopy, we observed a sex-biased difference in the capture of blood-borne bacteria by liver macrophages, a process that is critical for the clearance of systemic infections. Complement opsonization was indispensable for the capture of enteropathogenic Escherichia coli (EPEC) in male mice; however, a faster complement component 3-independent process involving abundant preexisting antibodies to EPEC was detected in female mice.

Genomic characterization of IMP and VIM carbapenemase-encoding transferable plasmids of Enterobacteriaceae.

Objectives: IMP and VIM carbapenemases, in association with class 1 integrons, have spread globally among multiple Enterobacteriaceae species. We characterized IMP- and VIM-encoding transferable plasmids of clinical Enterobacteriaceae collected from two global surveillance programmes.

Methods: We performed conjugation and transformation experiments for 38 IMP and 89 VIM producers.

The population structure of clinical extra-intestinal Escherichia coli in a teaching hospital from Nigeria.

Limited information is available regarding the population structure of extra-intestinal pathogenic Escherichia coli (ExPEC) in Africa. Antimicrobial resistance profiles, sequence types (STs) and fimH types were determined on 60 clinical ExPEC from Nigeria using a 7-single nucleotide polymorphism quantitative PCR and sequencing of certain genes. Different ST131 clades were identified with a multiplex PCR.

Preliminary insights into the occurrence of similar clones of extended-spectrum beta-lactamase-producing bacteria in humans, animals and the environment in Tanzania: A systematic review and meta-analysis between 2005 and 2016.

The emergence and spread of extended-spectrum beta-lactamase producing Enterobacteriaceae (ESBL-PE) are complex and of the public health concern across the globe. This review aimed at assessing the ESBL-PE clones circulating in humans, animals and the environment to provide evidence-based insights for combating ESBL-PE using One Health approach. Systematic search from Medline/PubMed, Google Scholar and African Journals Online was carried out and retrieved nine eligible articles (of 131) based on phenotypic and genotypic detection of ESBL-PE between 2005 and 2016 in Tanzania.

Genomic epidemiology of global VIM-producing Enterobacteriaceae.

Background: International data on the molecular epidemiology of Enterobacteriaceae with VIM carbapenemases are limited.

Methods: We performed short read (Illumina) WGS on a global collection of 89 VIM-producing clinical Enterobacteriaceae (2008-14).

Results: VIM-producing (11 varieties within 21 different integrons) isolates were mostly obtained from Europe.

ST131: a multidrug-resistant clone primed for global domination.

A single extra-intestinal pathogenic (ExPEC) clone, named sequence type (ST) 131, is responsible for millions of global antimicrobial-resistant (AMR) infections annually. Population genetics indicate that ST131 consists of different clades (i.e.

Urinary Tract Infections among HIV-Positive Pregnant Women in Mwanza City, Tanzania, Are High and Predicted by Low CD4+ Count.

. Urinary tract infection (UTI) among pregnant women can lead to adverse maternal and foetal outcomes. UTI has been widely studied in the general obstetric population in Tanzania; the present study evaluated the magnitude, antimicrobial resistance, and predictors of UTI among HIV-positive pregnant women.

Global Molecular Epidemiology of IMP-Producing Enterobacteriaceae.

International data on the molecular epidemiology of with IMP carbapenemases are lacking. We performed short-read (Illumina) whole-genome sequencing on a global collection of 38 IMP-producing clinical (2008 to 2014). IMP-producing (7 varieties within 11 class 1 integrons) were mainly present in the South Pacific and Asia.