Subtopic Deep Dive

Plasmid-Mediated Resistance
Research Guide

What is Plasmid-Mediated Resistance?

Plasmid-mediated resistance is the transfer of antibiotic resistance genes via conjugative plasmids among bacterial populations, enabling rapid horizontal dissemination of determinants like carbapenemases.

Plasmids carry mobile resistance genes such as those encoding carbapenemases in Enterobacteriaceae (Nordmann et al., 2011, 2241 citations). Tools like ResFinder identify these acquired genes in sequenced isolates (Zankari et al., 2012, 4974 citations). This mechanism contributes to global spread of multidrug resistance across species.

Curated Papers

Key Challenges

Why It Matters

Plasmid-mediated resistance accelerates outbreaks like NDM-1 producers in India, Pakistan, and UK, complicating treatment of infections (Kumarasamy et al., 2010, 2887 citations). It drives endemic carbapenemase spread in the US and Greece via Klebsiella pneumoniae (Nordmann et al., 2011). Containment failures amplify threats, with 48,700 annual US deaths linked to resistance (CDC, 2019, 5814 citations).

Key Research Challenges

Detecting Plasmid Genes

Identifying acquired resistance genes on plasmids requires sequencing and bioinformatics tools amid genome complexity. ResFinder addresses this but needs updates for novel determinants (Zankari et al., 2012). False negatives occur in low-abundance plasmids.

Tracking Transmission

Horizontal transfer dynamics via conjugation evade containment in clinical and environmental settings. Plasmids disseminate carbapenemases globally (Nordmann et al., 2011). Epidemiological models struggle with rapid evolution (Levy and Marshall, 2004).

Evolutionary Containment

Natural and acquired resistance determinants co-evolve, complicating interventions. Contamination by plasmids represents a post-antibiotic era phase (Martínez, 2012). Strategies fail against cross-species transfer.

Essential Papers

Antibiotic resistance threats in the United States, 2019

Centers for Disease Control and Prevention (U.S.) · 2019 · 5.8K citations

This report is dedicated to the 48,700 families who lose a loved one each year to antibiotic resistance or Clostridioides difficile, and the countless healthcare providers, public health experts, i...

Identification of acquired antimicrobial resistance genes

Ea Zankari, Henrik Hasman, Salvatore Cosentino et al. · 2012 · Journal of Antimicrobial Chemotherapy · 5.0K citations

A web server providing a convenient way of identifying acquired antimicrobial resistance genes in completely sequenced isolates was created. ResFinder can be accessed at www.genomicepidemiology.org...

Antibacterial resistance worldwide: causes, challenges and responses

Stuart B. Levy, Bonnie Marshall · 2004 · Nature Medicine · 4.0K citations

Global increase and geographic convergence in antibiotic consumption between 2000 and 2015

Eili Klein, Thomas P. Van Boeckel, Elena Martínez et al. · 2018 · Proceedings of the National Academy of Sciences · 3.0K citations

Significance Antibiotic resistance, driven by antibiotic consumption, is a growing global health threat. Our report on antibiotic use in 76 countries over 16 years provides an up-to-date comprehens...

Emergence of a new antibiotic resistance mechanism in India, Pakistan, and the UK: a molecular, biological, and epidemiological study

Kanimozhi Kumarasamy, Mark A. Toleman, Timothy R. Walsh et al. · 2010 · The Lancet Infectious Diseases · 2.9K citations

Antibiotic resistance in the environment

D. G. Joakim Larsson, Carl‐Fredrik Flach · 2021 · Nature Reviews Microbiology · 2.5K citations

Antibiotic resistance: a rundown of a global crisis

Bilal Aslam, Wei Wang, Muhammad Arshad et al. · 2018 · Infection and Drug Resistance · 2.4K citations

The advent of multidrug resistance among pathogenic bacteria is imperiling the worth of antibiotics, which have previously transformed medical sciences. The crisis of antimicrobial resistance has b...

Reading Guide

Foundational Papers

Start with Zankari et al. (2012, 4974 citations) for ResFinder detection tool; Levy and Marshall (2004, 4006 citations) for worldwide causes; Nordmann et al. (2011) for carbapenemase plasmid spread.

Recent Advances

CDC (2019, 5814 citations) on US threats; Larsson and Flach (2021, 2465 citations) on environmental roles.

Core Methods

Bioinformatics like ResFinder for gene identification (Zankari et al., 2012); epidemiological tracking of outbreaks (Kumarasamy et al., 2010); sequence analysis of conjugative plasmids.

How PapersFlow Helps You Research Plasmid-Mediated Resistance

Discover & Search

Research Agent uses searchPapers and citationGraph to map plasmid resistance spread from Zankari et al. (2012) ResFinder tool to Nordmann et al. (2011) carbapenemase papers, revealing 2241-citation clusters. exaSearch uncovers environmental plasmid dynamics linked to Larsson and Flach (2021).

Analyze & Verify

Analysis Agent applies readPaperContent on Kumarasamy et al. (2010) for NDM-1 plasmid details, then verifyResponse with CoVe to cross-check transfer claims against Levy and Marshall (2004). runPythonAnalysis statistically verifies conjugation rates from sequence data using pandas; GRADE scores evidence strength for ResFinder reliability.

Synthesize & Write

Synthesis Agent detects gaps in plasmid containment strategies across Nordmann et al. (2011) and Martínez (2012), flagging contradictions in evolutionary models. Writing Agent uses latexEditText and latexSyncCitations to draft reviews citing 4974-citation Zankari paper, with latexCompile for publication-ready output and exportMermaid for transfer diagrams.

Use Cases

"Analyze conjugation frequency of carbapenemase plasmids from sequence data in Nordmann 2011."

Research Agent → searchPapers('carbapenemase plasmids') → Analysis Agent → runPythonAnalysis(pandas on readPaperContent data) → statistical frequency plot and p-values.

"Write a review section on ResFinder detection of plasmid resistance genes."

Synthesis Agent → gap detection(Zankari 2012) → Writing Agent → latexEditText('draft') → latexSyncCitations(Levy 2004) → latexCompile → PDF with citations.

"Find code for plasmid gene annotation similar to ResFinder."

Research Agent → paperExtractUrls(Zankari 2012) → paperFindGithubRepo → githubRepoInspect → executable scripts for resistance gene detection.

Automated Workflows

Deep Research workflow scans 50+ papers from citationGraph of Zankari et al. (2012), generating structured reports on plasmid gene prevalence with GRADE scores. DeepScan applies 7-step CoVe to verify NDM-1 transmission claims from Kumarasamy et al. (2010). Theorizer builds models of plasmid evolution integrating Martínez (2012) natural resistance data.

Try Doxa for Plasmid-Mediated Resistance Research

Frequently Asked Questions

What defines plasmid-mediated resistance?

Transfer of resistance genes via self-replicating plasmids through conjugation, enabling rapid spread like carbapenemases (Nordmann et al., 2011).

What methods detect plasmid resistance genes?

ResFinder web server identifies acquired genes in sequenced isolates (Zankari et al., 2012, 4974 citations).

What are key papers on this topic?

Zankari et al. (2012, 4974 citations) on ResFinder; Nordmann et al. (2011, 2241 citations) on carbapenemase spread; Kumarasamy et al. (2010, 2887 citations) on NDM-1 emergence.

What open problems exist?

Tracking real-time plasmid transmission dynamics and developing inhibitors for conjugation amid evolutionary pressures (Levy and Marshall, 2004; Martínez, 2012).