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Related Concept Videos

Microbial Interactions: Parasitism01:22

Microbial Interactions: Parasitism

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Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
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Colonisation of Pathogens01:25

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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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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Microbial Interactions: Cooperation01:26

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Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
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The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
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Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through...
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Studying Microbial Communities In Vivo: A Model of Host-mediated Interaction Between Candida Albicans and Pseudomonas Aeruginosa in the Airways
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Polymicrobial-Host Interactions during Infection.

Wei Hong Tay1, Kelvin Kian Long Chong1, Kimberly A Kline2

  • 1Singapore Centre for Environmental Life Sciences Engineering, School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore; Singapore Centre for Environmental Life Sciences Engineering, Interdisciplinary Graduate School, Nanyang Technological University, 60 Nanyang Drive,637551, Singapore.

Journal of Molecular Biology
|May 13, 2016
PubMed
Summary
This summary is machine-generated.

Polymicrobial infections, involving multiple microbes, often lead to severe disease and poor outcomes. Understanding microbe-microbe and microbe-host interactions is crucial for developing effective treatments for these complex infections.

Keywords:
SMGUTIimmune modulationmicrobial synergywound infection

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Host-Pathogen Interactions

Background:

  • Historically, microbial pathogenesis research focused on single-organism infections.
  • Advanced sequencing reveals most infections are polymicrobial, increasing severity and impacting patient outcomes.
  • Polymicrobial infections involve synergistic interactions that enhance virulence and alter host immunity.

Purpose of the Study:

  • To review the literature on microbe-microbe and microbe-host interactions in polymicrobial infections.
  • To highlight key themes contributing to polymicrobial pathogenesis, including metabolite exploitation, immune modulation, niche optimization, and virulence induction.
  • To emphasize the need for a comprehensive understanding of microbial communities throughout infection progression for better therapeutic strategies.

Main Methods:

  • Review of recent scientific literature on polymicrobial infections.
  • Analysis of studies focusing on synergistic interactions between multiple microbes and between microbes and the host.
  • Synthesis of findings related to metabolite exchange, immune system modulation, niche adaptation, and virulence factor expression.

Main Results:

  • Polymicrobial infections are driven by complex interactions, including synergistic virulence and immune evasion.
  • Metabolite exploitation, immune modulation, niche optimization, and virulence induction are key mechanisms.
  • The presence of native microbiota or multiple pathogens at inoculation can influence infection progression.
  • Understanding these interactions is vital for predicting and managing infection outcomes.

Conclusions:

  • Polymicrobial infections represent a significant challenge in clinical settings due to their complexity and severity.
  • Interventions targeting specific microbe-microbe or microbe-host interactions hold promise for novel therapeutic approaches.
  • A holistic view of the microbial community dynamics is essential for advancing the field of infectious disease research.