Pathogenic Bacterial Infection
Pathogenic Bacterial Infection - Related Videos
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.
14:05
Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes
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Cited by 7 •
2013
Listeria monocytogenes is a Gram positive bacterial pathogen frequently used as a major model for the study of intracellular parasitism. Imaging late L. monocytogenes infection stages within the context of small-interfering RNA screens allows for the global study of cellular pathways required for bacterial infection of target host cells.
02:13
Generating an Ex Vivo Ovine Wounded Skin Model Infected with a Bacterial Pathogen
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2025
The video demonstrates the generation of an ex vivo ovine skin model infected with Staphylococcus aureus. This entails treating a lamb's forehead skin biopsy section with antibiotics, establishing a wound bed, positioning it on a permeable membrane in a multiwell plate with antibiotic-free medium, and establishing bacterial infection in the skin wound.
04:00
A Murine Skin Wound Infection Model to Study the Immune Response against a Bacterial Pathogen
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2025
This video demonstrates a technique to generate a murine model of skin wound infection. Upon infecting mice — engineered to express a fluorescent protein in neutrophils — with a genetically modified bioluminescent Staphylococcus aureus — a pathogenic bacteria. The bacterial burden at the infection site and the neutrophil recruitment dynamics can be studied using whole animal imaging.
02:29
Establishing Bacterial Infection in Drosophila Larvae
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2026
Source: Hiroyasu, A., D et. al., Extraction of Hemocytes from Drosophila melanogaster Larvae for Microbial Infection and Analysis. J. Vis. Exp. (2018)This video demonstrates the procedure for establishing a bacterial infection in Drosophila larvae by placing them into a bacterial droplet and pricking them with a tungsten needle. The larvae are then incubated on a grooved, nutrient-rich agar plate to study host-pathogen interactions.
FAQs
Adherence allows bacteria to remain associated with host cells rather than being removed immediately. This positioning can support continued access to nutrients, multiplication, and interaction with host defenses. Because attachment is linked to later stages of infection, studying how bacteria associate with tissues helps explain why some infections persist and how interventions might limit early colonization.
Bacterial toxins can directly damage host cells or alter their normal activities, whereas inflammation reflects the host response to infection and can disrupt tissue function as it develops. These mechanisms may act together, so biological studies examine both bacterial products and immune reactions when evaluating disease progression and identifying possible treatment or prevention strategies.
Bacteria must obtain resources while encountering host defenses that can restrict their survival. Nutrient acquisition supports bacterial multiplication, while evasion or resistance to immune defenses can prolong their presence in tissues. Examining these opposing processes helps biologists connect bacterial behavior with infection severity and understand how host immune responses shape disease outcomes.
A useful investigation considers bacterial adherence, access to nutrients, resistance to immune defenses, toxin production, and the resulting effects on tissue function. Researchers can relate these features to disease progression and host immune responses rather than studying bacterial growth in isolation. This framework also helps identify biological targets for diagnostics, antimicrobials, or vaccines.
Investigations of bacterial-host interactions reveal features associated with infection, including bacterial factors that support persistence or damage and the host responses triggered during disease. Such information can guide the search for measurable indicators of infection. In biology and public health, better diagnostic approaches can support recognition of disease and inform subsequent infection-control decisions.
This research is relevant whenever the goal is to interrupt bacterial persistence, reduce tissue damage, prevent disease, or limit transmission. Findings about bacterial strategies and host responses can inform antimicrobial treatments and vaccine development, while surveillance of transmission and antimicrobial resistance supports infection-control planning. Together, these applications connect laboratory biology with broader public health efforts.