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Related Concept Videos

Microbiome of the Eye01:22

Microbiome of the Eye

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The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
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The Skin Microbiota01:27

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The human skin serves as a complex ecosystem inhabited by a diverse community of microorganisms, including bacteria, fungi, and viruses. This microbiome plays a critical role in maintaining skin health and defending against pathogenic invaders. The composition of microbial communities varies significantly across different regions of the body, influenced primarily by the local levels of moisture and sebum.Regional Variation in Skin MicrobiotaCutibacterium acnes predominantly colonizes sebaceous...
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Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

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The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
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Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

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Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
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Surface Membrane Barriers01:18

Surface Membrane Barriers

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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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Bacterial Phylum Bacteroidota01:26

Bacterial Phylum Bacteroidota

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The phylum Bacteroidota includes over 700 species classified into four primary orders: Bacteroidales, Cytophagales, Flavobacteriales, and Sphingobacteriales. These gram-negative, non-sporulating rods exhibit saccharolytic capabilities and can be aerobic or fermentative, encompassing obligate aerobes, facultative aerobes, and obligate anaerobes. Many species display gliding motility, though some are nonmotile or use flagella. The genus Bacteroides is well-studied due to its significant role in...
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Related Experiment Video

Updated: Apr 12, 2026

In Vivo Confocal Microscopy: A Standard Operating Procedure for the Detection of Demodex Mites at the Eyelid Margin
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In Vivo Confocal Microscopy: A Standard Operating Procedure for the Detection of Demodex Mites at the Eyelid Margin

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[Bacterial flora in blepharitis].

I Bezza Benkaouha1, C Le Brun2, P-J Pisella1

  • 1Service d'ophtalmologie, hôpital Bretonneau, 2, boulevard Tonnellé, 37044 Tours cedex 9, France.

Journal Francais D'Ophtalmologie
|May 19, 2015
PubMed
Summary
This summary is machine-generated.

Bacterial overgrowth, particularly Corynebacterium species, is linked to blepharitis. This study found higher bacterial loads in blepharitis patients, suggesting a role for these microbes in the condition.

Keywords:
Bacterial floraBlepharitisBlépharitesC. macginleyiCorynebacterium sp.CorynébactériesFlore bactérienne

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Area of Science:

  • Ophthalmology
  • Microbiology
  • Dermatology

Context:

  • Blepharitis is an inflammatory eye condition with unclear causes.
  • Bacterial infections are suspected contributors to blepharitis.

Purpose:

  • To investigate the bacterial flora in blepharitis patients compared to healthy individuals.
  • To determine the role of specific bacteria in the development of blepharitis.

Summary:

  • Patients with blepharitis showed significantly higher bacterial culture positivity (81% vs. 38%) and colony counts compared to controls.
  • Corynebacterium species, especially C. macginleyi, were most prevalent in blepharitis patients.
  • Staphylococcus epidermidis and Staphylococcus aureus were also found more frequently in blepharitis cases.

Impact:

  • Identifies specific bacterial species associated with blepharitis.
  • Provides evidence for the role of bacterial etiologies in blepharitis pathogenesis.
  • Informs potential therapeutic strategies targeting bacterial involvement in blepharitis.