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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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Colonisation of Pathogens01:25

Colonisation of Pathogens

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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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Reservoir of Infection01:30

Reservoir of Infection

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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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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

Transmission-based Precautions I: Contact, Enteric, and Droplets

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Viral Recombination00:57

Viral Recombination

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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Related Experiment Video

Updated: Apr 3, 2026

Transsynaptic Tracing from Peripheral Targets with Pseudorabies Virus Followed by Cholera Toxin and Biotinylated Dextran Amines Double Labeling
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Multiroute pathogen transmission is different.

Samuel V Scarpino1,2,3,4,5,6

  • 1Department of Public Health and Health Sciences, Northeastern University, Boston, MA 02115, USA.

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This summary is machine-generated.

Pathogens spread through various routes, leading to complex disease patterns. Understanding these transmission dynamics is key to predicting and controlling outbreaks effectively.

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Propagation of Homalodisca coagulata virus-01 via Homalodisca vitripennis Cell Culture
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Area of Science:

  • Epidemiology
  • Infectious disease dynamics

Background:

  • Pathogen transmission occurs through diverse routes.
  • Understanding these routes is crucial for public health.

Purpose of the Study:

  • To explore the complex dynamics of pathogen spread.
  • To analyze counterintuitive epidemiological patterns.

Main Methods:

  • Modeling pathogen transmission routes.
  • Analyzing epidemiological data.

Main Results:

  • Multiple transmission routes create complex disease dynamics.
  • Epidemiology can exhibit unexpected patterns.

Conclusions:

  • Pathogen spread is multifaceted.
  • Epidemiological complexity requires advanced analysis.