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Related Concept Videos

The Oral Microbiota01:27

The Oral Microbiota

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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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Development of the Oral Microbiota01:28

Development of the Oral Microbiota

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The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
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Microbiota of the Urogenital Tract01:28

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The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...
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Hand hygiene01:23

Hand hygiene

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Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...
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Development of Human Microbiota01:30

Development of Human Microbiota

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The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from...
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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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A specific hygiene hypothesis.

Cliff Shunsheng Han1

  • 1Los Alamos National Laboratory, Bioscience Division and Quality Performance Assurance Division, MS, M888, Los Alamos, NM 87545, USA.

Medical Hypotheses
|July 4, 2016
PubMed
Summary

The hygiene hypothesis may not fully explain rising allergies. A new hypothesis suggests poor oral hygiene practices contribute to hay fever, prompting further research into prevention strategies.

Area of Science:

  • Immunology
  • Epidemiology
  • Public Health

Background:

  • Allergic diseases, particularly hay fever, have increased significantly in Western countries.
  • The traditional hygiene hypothesis offers insights but lacks effective translational prevention measures.
  • Recent research on immigrant allergies and oral infections suggests a need for revised hypotheses.

Purpose of the Study:

  • To propose a specific oral hygiene hypothesis for the rise in allergic diseases, focusing on hay fever.
  • To explore the link between historical oral hygiene standards and the increasing prevalence of allergies.
  • To identify potential new avenues for allergy prevention based on oral health.

Main Methods:

  • Review of epidemiological data on allergic diseases and oral hygiene trends.

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  • Analysis of studies concerning immigrant allergies and oral infections.
  • Formulation of a novel hypothesis linking oral hygiene practices to allergic disease development.
  • Main Results:

    • The traditional hygiene hypothesis has limitations in explaining the allergy epidemic.
    • A correlation is observed between historical oral hygiene levels in the US and the emergence of allergic diseases.
    • Oral infections and hygiene practices are proposed as significant contributing factors to hay fever.

    Conclusions:

    • A specific oral hygiene hypothesis offers a new perspective on the allergy epidemic.
    • Further research is essential to validate the proposed link between oral health and allergies.
    • Verifying this hypothesis could lead to novel and effective allergy prevention strategies.