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Related Concept Videos

Infection01:20

Infection

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...
Analysis of Population Pharmacokinetic Data01:12

Analysis of Population Pharmacokinetic Data

Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

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 temporal or...
Reservoir of Infection01:30

Reservoir of Infection

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,...
Transmission of Pathogens01:24

Transmission of Pathogens

Pathogens spread from their reservoirs to susceptible hosts through three main routes: contact transmission, vehicle transmission, and vector transmission. Each route involves distinct mechanisms of transfer.Contact TransmissionThis category includes direct contact, indirect contact, and droplet transmission:Direct contact involves immediate physical interaction between individuals—such as a handshake—which can spread pathogens like Streptococcus pyogenes, the bacterium responsible for...
Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...

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Metapopulation Model from Pathogen's Perspective: A Versatile Framework to Quantify Pathogen Transfer and Circulation

Shi Chen1, Cristina Lanzas2, Chihoon Lee3

  • 1Department of Public Health Sciences, University of North Carolina Charlotte, Charlotte, North Carolina, 28223, USA. schen56@uncc.edu.

Scientific Reports
|February 10, 2019
PubMed
Summary
This summary is machine-generated.

Metapopulation models unify host, pathogen, and environment to track pathogen transfer. This framework quantifies environmental pathogen spread and evaluates control strategies for healthcare-associated infections (HAIs).

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Area of Science:

  • Epidemiology
  • Mathematical Modeling
  • Environmental Health

Background:

  • Metapopulation models are crucial for understanding host movements and contacts in infectious disease epidemiology.
  • These models have the potential to analyze pathogen transfer within the environment.
  • Unifying host, pathogen, and environment is fundamental to epidemiology (the epidemiological triad).

Purpose of the Study:

  • To demonstrate metapopulation models as an ideal framework for characterizing and quantifying pathogen transfer between hosts and the environment.
  • To develop a generalized, customizable model for pathogen transfer dynamics.
  • To analyze pathogen circulation and evaluate control strategies for healthcare-associated infections (HAIs).

Main Methods:

  • Development of a generalized pathogen-transferring metapopulation model.
  • Analysis of three case studies: pure pathogen transfer, source-sink dynamics, and disinfection-based control.
  • Mathematical derivation of system equilibria for quantifying pathogen distribution.

Main Results:

  • Pathogen circulation between environmental and host compartments was demonstrated.
  • Complete pathogen eradication is achievable through source-sink dynamics and disinfection.
  • The rate of convergence to system equilibria varies with model parameterization.

Conclusions:

  • Metapopulation models effectively unify host, pathogen, and environmental factors for studying disease transmission.
  • The developed model provides a quantitative framework for analyzing pathogen dynamics and control.
  • Future extensions can incorporate host-to-host transmission and within-host pathogen dynamics.