Bradley J Langford

Dr. Bradley J Langford


Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 December 2020 in Clinical Microbiology and Infection
Verified
Journal Article
Closed access
BLBradley J Langford
Bradley J Langford
MSMiranda So
Miranda So
SRSumit Raybardhan
Sumit Raybardhan
VLValerie Leung
Valerie Leung
DWDuncan Westwood
Duncan Westwood
NDNick Daneman
Nick Daneman

1 April 2021 in Clinical Microbiology and Infection
Verified
Journal Article
Closed access
BLBradley J Langford
Bradley J Langford
MSMiranda So
Miranda So
SRSumit Raybardhan
Sumit Raybardhan
VLValerie Leung
Valerie Leung
JSJean-Paul R. Soucy
Jean-Paul R. Soucy
DMDerek R. MacFadden
Derek R. MacFadden

9 December 2022 in Clinical Microbiology and Infection
Verified
Journal Article
Open access
BLBradley J Langford
Bradley J Langford
JSJean-Paul R. Soucy
Jean-Paul R. Soucy
VLValerie Leung
Valerie Leung
MSMiranda So
Miranda So
AKAngela T.H. Kwan
Angela T.H. Kwan
NDNick Daneman
Nick Daneman
COVID-19 and antimicrobial resistance (AMR) are two intersecting global public health crises. We aimed to describe the impact of the COVID-19 pandemic on AMR across health care settings. A search was conducted in December 2021 in WHO COVID-19 Research Database with forward citation searching up to June 2022. Studies evaluating the impact of COVID-19 on AMR in any population were included and influencing factors were extracted. Reporting of enhanced infection prevention and control and/or antimicrobial stewardship programs was noted. Pooling was done separately for Gram-negative and Gram-positive organisms. Random-effects meta-analysis was performed. Of 6036 studies screened, 28 were included and 23 provided sufficient data for meta-analysis. The majority of studies focused on hospital settings (n = 25, 89%). The COVID-19 pandemic was not associated with a change in the incidence density (incidence rate ratio 0.99, 95% CI: 0.67–1.47) or proportion (risk ratio 0.91, 95% CI: 0.55–1.49) of methicillin-resistant Staphylococcus aureus or vancomycin-resistant enterococci cases. A non-statistically significant increase was noted for resistant Gram-negative organisms (i.e. extended-spectrum beta-lactamase, carbapenem-resistant Enterobacterales, carbapenem or multi-drug resistant or carbapenem-resistant Pseudomonas aeruginosa or Acinetobacter baumannii, incidence rate ratio 1.64, 95% CI: 0.92–2.92; risk ratio 1.08, 95% CI: 0.91–1.29). The absence of reported enhanced infection prevention and control and/or antimicrobial stewardship programs initiatives was associated with an increase in gram-negative AMR (risk ratio 1.11, 95% CI: 1.03–1.20). However, a test for subgroup differences showed no statistically significant difference between the presence and absence of these initiatives (p 0.40). The COVID-19 pandemic may have hastened the emergence and transmission of AMR, particularly for Gram-negative organisms in hospital settings. But there is considerable heterogeneity in both the AMR metrics used and the rate of resistance reported across studies. These findings reinforce the need for strengthened infection prevention, antimicrobial stewardship, and AMR surveillance in the context of the COVID-19 pandemic.

31 January 2023 in The Lancet Microbe
Verified
Journal Article
Open access
BLBradley J Langford
Bradley J Langford
MSMiranda So
Miranda So
MSMarina Simeonova
Marina Simeonova
VLValerie Leung
Valerie Leung
JLJennifer Lo
Jennifer Lo
SBSilvia Bertagnolio
Silvia Bertagnolio
Frequent use of antibiotics in patients with COVID-19 threatens to exacerbate antimicrobial resistance. We aimed to establish the prevalence and predictors of bacterial infections and antimicrobial resistance in patients with COVID-19. We did a systematic review and meta-analysis of studies of bacterial co-infections (identified within ≤48 h of presentation) and secondary infections (>48 h after presentation) in outpatients or hospitalised patients with COVID-19. We searched the WHO COVID-19 Research Database to identify cohort studies, case series, case-control trials, and randomised controlled trials with populations of at least 50 patients published in any language between Jan 1, 2019, and Dec 1, 2021. Reviews, editorials, letters, pre-prints, and conference proceedings were excluded, as were studies in which bacterial infection was not microbiologically confirmed (or confirmed via nasopharyngeal swab only). We screened titles and abstracts of papers identified by our search, and then assessed the full text of potentially relevant articles. We reported the pooled prevalence of bacterial infections and antimicrobial resistance by doing a random-effects meta-analysis and meta-regression. Our primary outcomes were the prevalence of bacterial co-infection and secondary infection, and the prevalence of antibiotic-resistant pathogens among patients with laboratory-confirmed COVID-19 and bacterial infections. The study protocol was registered with PROSPERO (CRD42021297344). We included 148 studies of 362 976 patients, which were done between December, 2019, and May, 2021. The prevalence of bacterial co-infection was 5·3% (95% CI 3·8-7·4), whereas the prevalence of secondary bacterial infection was 18·4% (14·0-23·7). 42 (28%) studies included comprehensive data for the prevalence of antimicrobial resistance among bacterial infections. Among people with bacterial infections, the proportion of infections that were resistant to antimicrobials was 60·8% (95% CI 38·6-79·3), and the proportion of isolates that were resistant was 37·5% (26·9-49·5). Heterogeneity in the reported prevalence of antimicrobial resistance in organisms was substantial (I2=95%). Although infrequently assessed, antimicrobial resistance is highly prevalent in patients with COVID-19 and bacterial infections. Future research and surveillance assessing the effect of COVID-19 on antimicrobial resistance at the patient and population level are urgently needed. WHO.

26 November 2021 in Clinical Microbiology and Infection
Verified
Journal Article
Closed access
BLBradley J Langford
Bradley J Langford
MSMiranda So
Miranda So
VLValerie Leung
Valerie Leung
SRSumit Raybardhan
Sumit Raybardhan
JLJennifer Lo
Jennifer Lo
JSJean-Paul R. Soucy
Jean-Paul R. Soucy

20 September 2020 in JACCP: Journal of the American College of Clinical Pharmacy
Verified
Journal Article
Open access
PDF file
DGDebra A. Goff
Debra A. Goff
Diane Ashiru-OredopeDiane Ashiru-Oredope
Diane Ashiru-Oredope
KCKelly A. Cairns
Kelly A. Cairns
KEKhalid Eljaaly
Khalid Eljaaly
TGTimothy P. Gauthier
Timothy P. Gauthier
NSNatalie Schellack
Natalie Schellack
Throughout the SARS‐CoV‐2 (COVID‐19) global pandemic, pharmacists were rarely mentioned as essential frontline health care providers by the news media, the public, or politicians. Around the world, pharmacists are working on the frontlines of health care every day providing essential health care services during the pandemic. Pharmacists are medication experts providing patient care in a variety of settings including hospitals, clinics, community pharmacies, long‐term care, physician offices, and national and public health. In this paper, we describe how pharmacists from high and low‐middle income countries contributed to essential patient care and well‐being of the public during the COVID‐19 pandemic. While the news media, the public, and politicians often overlooked pharmacists as essential frontline health care providers, we hope that this list of contributions by pharmacists from nine countries in this article can help to change this perspective.