Intracellular Bacteria
Intracellular Bacteria - Related Videos
01:33
Investigating Autophagy-Mediated Clearance of Intracellular Bacteria In Vitro
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2026
Take pig kidney cell cultures, with one culture pre-treated with an inhibitor that increases lysosomal pH, impairing autophagic-lysosomal degradation.Add pathogenic bacteria and centrifuge to enhance host-pathogen contact.Incubate to allow bacterial invasion and internalization into endocytic vesicles.The internalized bacteria consume host nutrients to replicate, triggering metabolic stress.This stress activates autophagy, where an autophagic membrane expands around the vesicle, forming an...
01:10
Intracellular Movement of Viruses and Bacteria
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2023
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
03:41
Isolation of Intracellular Pathogenic Bacteria from Infected Host Cells
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2026
Source: Sigal, N., et al. RNA Purification from Intracellularly Grown Listeria monocytogenes in Macrophage Cells. J. Vis. Exp. (2016).This video demonstrates the isolation of internalized pathogenic bacteria from infected bone marrow-derived macrophages (BMDMs). Bacteria are allowed to attach to host cells, and unattached bacteria are washed away. After internalization, an antibiotic is added to eliminate non-internalized bacteria. The host cells are lysed, centrifuged, and the supernatant is...
04:04
Lysostaphin-Based Enzyme Protection Assay: An In Vitro Method to Quantify Intracellular Staphylococcus aureus Load by Enzyme-Mediated Selective Killing of Extracellular Bacteria
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2025
In this video, we demonstrate a lysostaphin-based in vitro enzyme protection assay to quantify the Staphylococcus aureus internalization in A549 cells. The assay helps in qualitative, quantitative, and characterization studies of the intracellular bacterial load in the host cells.
11:38
Application of Fluorescent Nanoparticles to Study Remodeling of the Endo-lysosomal System by Intracellular Bacteria
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Cited by 3 •
2015
This article describes methods for the synthesis and fluorescent labeling of nanoparticles (NPs). The NPs were applied in pulse-chase experiments to label the endo-lysosomal system of eukaryotic cells. Manipulation of the endo-lysosomal system by activities of the intracellular pathogen Salmonella enterica were followed by live cell imaging and quantified.
FAQs
The intracellular location creates a protected niche that can shape both bacterial persistence and disease. After entering a host cell, bacteria may remain within membrane-bound vacuoles or reach the cytosol, and each location determines how they access host nutrients and encounter cellular defenses. Comparing these destinations helps explain differences in intracellular survival and infection outcomes.
This distinction reflects different growth requirements. Obligate intracellular pathogens depend on host-cell resources for replication, whereas facultative species can alternate between intracellular and extracellular growth. That contrast helps researchers interpret how bacterial life cycles relate to infection, persistence, and the conditions required to study growth inside host cells.
Intracellular bacteria must persist while exposed to cellular defenses and limited access to resources. Their ability to occupy a vacuole or the cytosol, use host nutrients, and adapt to the cellular environment influences whether they remain within host cells and alter host biology. These interactions are central to understanding bacterial survival and disease development.
Research on intracellular bacteria reveals how pathogens enter cells, persist in protected cellular environments, evade immune responses, and alter host biology. These findings clarify host-pathogen interactions, meaning the reciprocal effects between microbes and host cells. The resulting knowledge can guide studies of infection mechanisms and the biological changes associated with disease.
Bacteria located inside host cells occupy a protected niche, so studying antibiotic activity in that context addresses whether antibacterial effects can be examined where the organisms persist. This research connects bacterial location with treatment-related questions and can help clarify how intracellular infection should be considered when investigating strategies to treat bacterial disease.
Their ability to persist within host cells makes intracellular bacteria relevant to diagnostic methods and to strategies for preventing or treating infection. Research can connect cellular persistence and altered host biology with efforts to detect bacterial disease, understand its progression, and identify approaches that address pathogens protected within host-cell environments.