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Updated: Jan 19, 2026

Methodology for the Study of Horizontal Gene Transfer in Staphylococcus aureus
Published on: March 10, 2017
Horizontal Gene Transfer and Its Association with Antibiotic Resistance in the Genus Aeromonas spp
J Manuel Bello-López1, Omar A Cabrero-Martínez2, Gabriela Ibáñez-Cervantes3,4
1Unidad de Investigación, Hospital Juárez de México, Av. Instituto Politécnico Nacional 5160, Magdalena de las Salinas, Gustavo A. Madero, Mexico 07360, Mexico. juanmanuelbello81@hotmail.com.
Abstract:
The evolution of multidrug resistant bacteria to the most diverse antimicrobials known so far pose a serious problem to global public health. Currently, microorganisms that develop resistant phenotypes to multiple drugs are associated with high morbidity and mortality. This resistance is encoded by a group of genes termed 'bacterial resistome', divided in intrinsic and extrinsic resistome. The first one refers to the resistance displayed on an organism without previous exposure to an antibiotic not involving horizontal genetic transfer, and it can be acquired via mutations. The latter, on the contrary, is acquired exclusively via horizontal genetic transfer involving mobile genetic elements that constitute the 'bacterial mobilome'. This transfer is mediated by three different mechanisms: transduction, transformation, and conjugation. Recently, a problem of public health due to implications in the emergence of multi-drug resistance in Aeromonas spp. strains in water environments has been described. This is derived from the genetic material transfer via conjugation events. This is important, since bacteria that have acquired antibiotic resistance in natural environments can cause infections derived from their ingestion or direct contact with open wounds or mucosal tissue, which in turn, by their resistant nature, makes their eradication complex. Implications of the emergence of resistance in Aeromonas spp. by horizontal gene transfer on public health are discussed.
Insights
Multidrug resistant bacteria pose a global health threat. Horizontal gene transfer, particularly conjugation in *Aeromonas* spp. from water, accelerates the spread of antibiotic resistance, complicating infections.
Area of Science:
- Microbiology
- Genetics
- Public Health
Background:
- Multidrug resistant bacteria present a significant global public health challenge, linked to increased morbidity and mortality.
- Bacterial resistance is encoded by the 'bacterial resistome', comprising intrinsic (mutation-based) and extrinsic (horizontal gene transfer-based) resistance.
- Horizontal gene transfer, mediated by transduction, transformation, and conjugation, involves the 'bacterial mobilome'.
Purpose of the Study:
- To discuss the public health implications of multidrug resistance emergence in *Aeromonas* spp.
- To highlight the role of horizontal gene transfer, specifically conjugation, in spreading resistance in aquatic environments.
- To examine the complex challenges posed by resistant bacterial infections originating from natural environments.
Main Methods:
- Review of existing literature on bacterial resistance mechanisms.
- Analysis of genetic material transfer via conjugation in *Aeromonas* spp.
- Discussion of public health impacts of resistant bacterial infections.
Main Results:
- *Aeromonas* spp. in water environments are implicated in the emergence of multidrug resistance.
- Conjugation events facilitate the transfer of genetic material, contributing to resistance spread.
- Acquisition of antibiotic resistance in natural environments poses risks through ingestion or direct contact.
Conclusions:
- Horizontal gene transfer significantly contributes to the spread of multidrug resistance in bacteria like *Aeromonas* spp.
- Resistant *Aeromonas* spp. from water environments represent a growing public health concern.
- The complexity of eradicating infections caused by multidrug-resistant bacteria necessitates further research and intervention strategies.
Related Concept Videos
Types of Genetic Transfer Between Organisms
Types of Genetic Transfer Between Organisms
Conjugation
Horizontal Gene Transfer
Transduction
Development of Antibiotic Resistance

