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Colonisation of Pathogens01:25

Colonisation of Pathogens

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Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...
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Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
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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...
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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Quantification of Cytosolic vs. Vacuolar Salmonella in Primary Macrophages by Differential Permeabilization
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Space: A Final Frontier for Vacuolar Pathogens.

Elizabeth Di Russo Case1, Judith A Smith2, Thomas A Ficht3

  • 1Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, TX, USA.

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|February 5, 2016
PubMed
Summary
This summary is machine-generated.

Intracellular pathogens manipulate host cell space by altering vesicular traffic and membrane fusion. This review examines how pathogens create tight or spacious vacuoles for replication, offering insights into cellular biology.

Keywords:
BrucellaChlamydiaCoxiellaLegionellaMycobacteriumintracellular pathogensmembrane fusionvesicular trafficking

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Area of Science:

  • Cell Biology
  • Pathogen-Host Interactions
  • Molecular Mechanisms

Background:

  • Eukaryotic cells have limited internal space, crucial for function.
  • Intracellular pathogens compete with host cells for this space upon infection.
  • Pathogen manipulation of cellular resources reveals host-pathogen dynamics.

Purpose of the Study:

  • To explore how intracellular pathogens modulate subcellular space.
  • To understand the mechanisms of vesicular traffic and membrane fusion exploited by pathogens.
  • To compare pathogen strategies for creating replication compartments.

Main Methods:

  • Comparative analysis of various intracellular pathogens.
  • Review of molecular mechanisms regulating pathogen-containing vacuoles.
  • Examination of trafficking pathways involved in space allocation.

Main Results:

  • Pathogens employ distinct strategies to form either tight or spacious pathogen-containing vacuoles.
  • These strategies involve modulation of host cell vesicular transport and membrane dynamics.
  • Different vacuole types offer potential advantages for pathogen survival and replication.

Conclusions:

  • Pathogen-induced alterations in cellular space provide insights into fundamental cell biology.
  • Understanding pathogen strategies can reveal novel host-pathogen interactions.
  • Further research can uncover new therapeutic targets and cellular mechanisms.