Bacterial Recovery
Bacterial Recovery - Related Videos
00:13
A Precise Pathogen Delivery and Recovery System for Murine Models of Secondary Bacterial Pneumonia
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Cited by 2 •
2019
Here, we present methods to improve secondary bacterial pneumonia studies by providing a non-invasive route of instillation into the lower respiratory tract followed by pathogen recovery and transcript analysis. These procedures are reproducible and can be performed without specialized equipment such as cannulas, guide wires, or fiber optic cables.
03:57
Bacterial Endophthalmitis Mouse Model: A Method for Generating Bacterial Endophthalmitis via Intravitreal Injection of Bacterial Suspension into Eye of Mouse
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2025
This video describes a method for generating a mouse model that mimics bacterial endophthalmitis – an intraocular infection resulting from a bacterial invasion into the eye’s vitreous cavity – via intravitreal injection of a bacterial suspension into the eye. This mouse model helps study the disease mechanism and evaluate therapeutics for it.
02:40
Amplification and Recovery of Infectious Bacteriophages
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2026
Source: Rustad, M. et al. Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System. J. Vis. Exp. (2017)This video demonstrates the amplification and recovery of infectious bacteriophages from E. coli cultures. It outlines the steps for plaque isolation, phage replication, controlled lysis, and purification.
09:50
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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Cited by 33 •
2015
We demonstrate the extraction of ammonium from an ammonium-rich stream using an electrochemical and a bioelectrochemical system. The reactor setup, operation and data analysis are discussed.
05:21
Bacterial Transformation - Student Protocol
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2019
Bacterial Transformation ExpandIMPORTANT: In addition to wearing the appropriate personal protective equipment, be sure to take care to keep your face away from suspension cultures, and to avoid inhaling reagents. Do not touch your face while performing the experiment. Always wash your hands before and after every experiment. When you are ready to safely begin, check to make sure you have a tube or tubes of competent E. coli cells in your ice bucket. Then, transfer 50 µL from one of these tubes...
FAQs
Recovery depends on repairing damaged cellular components and restoring membrane and metabolic activity. Once these functions improve, cells can resume macromolecule synthesis, allowing normal growth-related processes to restart. The extent and speed of recovery therefore depend on how severely conditions such as nutrient limitation, temperature change, desiccation, or antimicrobial stress disrupted cellular function.
Membrane and metabolic activity are central indicators of whether stressed cells can regain function. A damaged membrane can interfere with essential cellular processes, while reduced metabolic activity limits the energy and biosynthesis needed for repair. Restoration of both helps cells progress from stress toward renewed macromolecule synthesis and eventual colony formation under favorable conditions.
A cell may remain living even when it temporarily fails to grow under routine culture conditions. Providing suitable nutrients, temperature, osmotic conditions, and sufficient incubation time can reveal whether it resumes activity and forms a colony. This approach helps separate living but nonculturable cells from cells that cannot recover, supporting more accurate interpretation of viability.
Recovery outcomes reflect the type and intensity of prior stress, including nutrient limitation, temperature change, desiccation, and antimicrobial exposure. The return to favorable conditions must address the cells’ need for nutrients, suitable temperature, appropriate osmotic conditions, and adequate time. If these conditions are unsuitable or insufficient, viable cells may remain inactive or fail to form colonies.
A recovery procedure commonly supplies nutrients, an appropriate temperature, suitable osmotic conditions, and enough incubation time. These factors support repair, renewed membrane and metabolic activity, and resumed macromolecule synthesis. Researchers then assess whether cells regain viability and produce colonies, using the resulting growth to evaluate recovery under the selected conditions.
The method is useful when stress may have reduced culturability without eliminating all living cells. Applying recovery conditions before assessing colony formation can improve enumeration of environmental and clinical bacteria by allowing temporarily inactive cells to resume growth. This reduces the risk of interpreting a failure to grow immediately as proof that all cells are dead.
Recovery testing can show whether antimicrobial exposure caused irreversible loss of viability or only temporary impairment. After exposure, suitable nutrients, temperature, osmotic conditions, and incubation time provide an opportunity for surviving cells to repair and form colonies. The outcome helps researchers interpret antimicrobial effectiveness alongside the possibility of persistence among stressed bacterial populations.
Measuring recovery contributes to research on bacterial persistence, sterilization, and antimicrobial effectiveness. It can reveal whether cells withstand unfavorable conditions in a recoverable state, whether a treatment prevents later colony formation, and how culture conditions influence detection. These observations connect cellular repair and resuscitation with broader questions about survival and accurate viability assessment.