Related Experiment Video
Updated: Jun 27, 2026

09:01
Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi
Published on: September 28, 2022
Generalized transduction by lytic bacteriophages.
Thomas E Waddell1, Kristyn Franklin, Amanda Mazzocco
1Pro-Lab Diagnostics, Richmond Hill, Ontario, Canada.
Methods in Molecular Biology (Clifton, N.J.)
|December 11, 2008
Summary
Researchers developed methods to test if lytic phages, like rV5, can transfer bacterial genes. This is important for understanding risks associated with using phages to fight infections and contamination.
Area of Science:
- Microbiology
- Bacteriology
- Virology
Background:
- Lytic phages are explored as antimicrobials and for reducing bacterial contamination.
- Concerns exist about potential gene transfer (transduction) by lytic phages, similar to temperate phages.
- Generalized transduction could disseminate bacterial virulence factors.
Purpose of the Study:
- To develop and present simple methods for detecting generalized transduction mediated by lytic phages.
- To determine if the lytic phage rV5 can mediate generalized transduction in Escherichia coli O157:H7.
Main Methods:
- Development of sensitive assays to detect generalized transduction.
- Application of these methods to the lytic phage rV5 and Escherichia coli O157:H7.
Main Results:
- The study presents methods capable of detecting generalized transduction.
- These methods are adaptable for studying transduction between various bacterial strains.
Conclusions:
- The developed methods are effective for assessing transduction potential of lytic phages.
- These techniques can be applied to evaluate risks of virulence factor dissemination by lytic phages in different bacterial contexts.
Related Concept Videos
Transduction
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
Lysogenic Cycle of Bacteriophages
In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
Lytic Cycle of Bacteriophages
Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the lytic replication...
Viral Replication: Lysogenic Cycle
The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects its...
Viral Replication: Lytic Cycle
Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
DNA Bacteriophages
Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...

