Bacterial Infection Model
Bacterial Infection Model - Related Videos
03:16
Processing of Infected Tissues for Bacterial Enumeration in a Mouse Co-Infection Model
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2026
Source: Lenhard, A., et al. A Mouse Model for the Transition of Streptococcus pneumoniae from Colonizer to Pathogen upon Viral Co-Infection Recapitulates Age-Exacerbated Illness. J. Vis. Exp. (2022)This video demonstrates the processing of lungs from a mouse co-infected with a pathogenic bacterium and a virus. Mincing, homogenizing, and plating the lung tissue allows quantification of bacterial load, indicating bacterial spread to the lungs and disease severity.
03:57
Bacterial Infection Quantitation Assay: A Method to Quantify Intraocular Bacterial Load in Mouse Model of Bacterial Endophthalmitis
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2025
This video describes the technique of quantifying bacterial infection from eye homogenates obtained from a murine model of bacterial endophthalmitis caused by Bacillus cereus. This technique helps study the host immune response and its dependency on the host and ocular bacterial gene expression in murine models.
11:40
Humanized Mouse Model to Study Bacterial Infections Targeting the Microvasculature
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Cited by 7 •
2014
Neisseria meningitidis is a human specific pathogen that infects blood vessels. In this protocol human microvessels are introduced into a mouse by grafting human skin onto immunocompromised mice. Bacteria adhere extensively to the human vessels, leading to vascular damage and development of the purpuric rash typically observed in human cases.
02:52
A Technique to Establish a Bacterial Infection Model in an Ex Vivo Organ Culture
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2025
This video demonstrates a method to establish an infection model in placental tissues to study infection propagation. An ex vivo placental organ culture is infected with Listeria monocytogenes, a facultative intracellular parasite. The bacteria invade extravillous trophoblasts (EVTs) to enter the placental tissue and then propagate to other cells via cell-to-cell spread.
11:18
Infection of Zebrafish Embryos with Intracellular Bacterial Pathogens
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Cited by 234 •
2012
Transparent zebrafish embryos have proved useful model hosts to visualize and functionally study interactions between innate immune cells and intracellular bacterial pathogens, such as Salmonella typhimurium and Mycobacterium marinum. Micro-injection of bacteria and multi-color fluorescence imaging are essential techniques involved in the application of zebrafish embryo infection models.
FAQs
A useful assessment follows several linked outcomes: bacterial growth, colonization, host-cell damage, and immune responses. Tracking these changes over time helps distinguish bacterial persistence from effects on host cells and reveals how infection develops within the selected biological environment. Together, the measurements provide a broader view of disease progression than bacterial abundance alone.
A defined bacterial strain gives researchers a consistent starting point for examining infection-related outcomes. When the same strain is introduced under controlled conditions, differences in bacterial growth, colonization, host-cell damage, or immune responses can be compared more reliably. This consistency supports reproducible experiments and helps investigators evaluate how strains or interventions differ in their effects.
The model level determines which parts of the host-pathogen interaction can be examined. Cell cultures can support studies of host-cell effects, tissues provide a more organized biological setting, and whole organisms allow infection to be considered across the organism. Selecting among these systems helps align the experiment with questions about damage, colonization, immune responses, or disease processes.
Patterns of bacterial growth, colonization, host-cell damage, and immune response provide evidence about how a bacterium causes disease. Examining these outcomes together helps connect bacterial behavior with host effects, rather than treating virulence as a single measurement. Such analysis supports investigation of virulence mechanisms and the broader interaction between bacterial pathogens and their hosts.
A general workflow begins by selecting a bacterial strain and a biological environment, then introducing the bacteria under controlled conditions. Researchers subsequently monitor infection-related outcomes over time, including bacterial growth, colonization, host-cell damage, and immune responses. The resulting measurements can be compared across bacterial strains or experimental interventions to identify consistent biological effects.
These models are used when investigators need controlled comparisons of antimicrobial treatments, vaccine candidates, or infection-control strategies. By monitoring how infection-related outcomes change after an intervention, researchers can assess effects on bacterial growth, colonization, host-cell damage, or immune responses. The models therefore connect experimental manipulation with measurable changes in disease-related processes.
Researchers can introduce different defined bacterial strains into comparable biological environments and monitor the same outcomes over time. Differences in growth, colonization, host-cell damage, or immune responses may then indicate distinct effects on the host or differences in disease-related behavior. Controlled comparisons are especially useful for investigating virulence mechanisms and host-pathogen interactions in biology.