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Related Concept Videos

Lytic Cycle of Bacteriophages01:30

Lytic Cycle of Bacteriophages

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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...
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Microorganisms in Medicine and Therapeutics01:29

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
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DNA Bacteriophages01:26

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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...
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Lysogenic Cycle of Bacteriophages00:43

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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...
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Viral Replication: Lysogenic Cycle01:16

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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...
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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
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Related Experiment Video

Updated: Aug 23, 2025

Bacteriophage Effectiveness for Biocontrol of Foodborne Pathogens Evaluated via High-Throughput Settings
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Phage Therapy Takes on Broad Applications.

Leslie Mertz

    IEEE Pulse
    |October 27, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Bacteriophages (phages) are viruses that infect bacteria. Once promising for treating infections, they are now seeing renewed interest due to rising antibiotic resistance, with recent successes against drug-resistant strains.

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    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Bacteriology

    Background:

    • Antibiotics were once the primary treatment for bacterial infections.
    • The rise of antibiotic resistance has created a need for alternative therapies.
    • Bacteriophages were previously explored as antimicrobial agents.

    Purpose of the Study:

    • To review the historical context and recent resurgence of bacteriophage therapy.
    • To highlight the potential of phages in combating antibiotic-resistant bacteria.
    • To discuss the expanding applications of phage therapy in treating various infections.

    Main Methods:

    • Review of historical scientific literature on bacteriophages.
    • Analysis of recent case studies and clinical trials involving phage therapy.
    • Examination of emerging research on phage applications beyond bacterial infections.

    Main Results:

    • Bacteriophage therapy has demonstrated efficacy against severe antibiotic-resistant bacterial strains.
    • Several last-resort treatments utilizing phages have shown successful outcomes.
    • Ongoing research indicates broader potential applications for phage therapy.

    Conclusions:

    • Bacteriophage therapy is re-emerging as a viable treatment option for bacterial infections.
    • The ability of phages to overcome antibiotic resistance is driving renewed interest.
    • Phage therapy holds promise for expanded use in treating a range of diseases and infections.