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Related Concept Videos

Infection01:20

Infection

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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.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
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Reservoir of Infection01:30

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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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Infectious Diseases and Their Occurrence01:28

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Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable...
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What is Biodiversity?01:19

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Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
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Gene Flow02:39

Gene Flow

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Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
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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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Oral Bacterial Infection and Shedding in Drosophila melanogaster
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Behavioural differences: a link between biodiversity and pathogen transmission.

Laurie Dizney1, M Denise Dearing1

  • 1Department of Biology, University of Utah, Salt Lake City, Salt Lake, UT, U.S.A.

Animal Behaviour
|January 12, 2016
PubMed
Summary

Higher biodiversity may reduce zoonotic disease spread by influencing animal behavior. In this study, deer mice in diverse areas showed less risky behavior, lowering Sin Nombre virus (SNV) transmission risk.

Keywords:
Peromyscus maniculatusSin Nombre virusbehaviourbiodiversitybold–shy phenotypedeer mousedilution effectpathogen transmission

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Area of Science:

  • Ecology
  • Epidemiology
  • Behavioral Ecology

Background:

  • Biodiversity can decrease zoonotic pathogen prevalence, a phenomenon known as the dilution effect.
  • The mechanisms underlying the dilution effect, particularly how biodiversity influences host behavior and pathogen transmission, remain largely unexplored.
  • Sin Nombre virus (SNV) is a zoonotic pathogen transmitted by deer mice (Peromyscus maniculatus).

Purpose of the Study:

  • To investigate the hypothesis that increased biodiversity alters host behaviors critical for pathogen transmission.
  • To elucidate the mechanisms behind the dilution effect in the context of Sin Nombre virus (SNV) and deer mice.
  • To compare host behaviors between high- and low-diversity ecological communities.

Main Methods:

  • Utilized a novel surveillance system with infrared cameras and passive integrated transponder (PIT) tag readers to observe deer mouse behavior.
  • Compared behaviors of deer mice in high- and low-biodiversity sites.
  • Quantified time spent in behaviors related to SNV transmission and characterized behavioral phenotypes (bold vs. shy).

Main Results:

  • Deer mice in more diverse sites exhibited reduced time spent in behaviors associated with SNV transmission compared to those in less diverse sites.
  • Behavioral differences were linked to the prevalence of distinct behavioral phenotypes: 'bold' and 'shy' deer mice.
  • Bold deer mice were more abundant (4.6x) and more frequently infected with SNV (3x) in less diverse environments.

Conclusions:

  • Biodiversity influences zoonotic pathogen transmission by altering the relative abundance of different behavioral phenotypes within host populations.
  • Findings suggest that shifts in biodiversity can impact disease dynamics through behavioral mechanisms, with implications for human health and conservation strategies.
  • The study highlights the role of behavioral ecology in understanding disease dilution effects.