Contact Transmission
Contact Transmission - Related Videos
01:17
Transmission-based Precautions I: Contact, Enteric, and Droplets
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2025
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: Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
01:13
Contact Angle
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2023
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces. The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
08:25
Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Cited by 2 •
2022
Contact hypersensitivity (CHS) is a murine experimental model of allergic contact dermatitis (ACD). CHS is based on sensitization with reactive hapten by painting the shaved skin of the chest and abdomen, with a subsequent ear skin challenge with a diluted hapten, causing a swelling reaction that is assessed in various ways.
03:42
Fluorescence Fluctuation Spectroscopy to Study Protein Interaction at Cell Contacts
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2025
This video demonstrates the use of fluorescence fluctuation spectroscopy to detect the interaction among cell surface proteins at cell-cell contacts. By expressing the transmembrane adhesion receptor of interest labeled with a fluorescent protein and mixing two different cell populations harboring two spectrally separated fluorescent labels, the trans-interaction between the receptors of two neighboring cells with different-colored fluorescence is assessed via cross-correlation in the...
03:55
Larval Contact Assay: A Procedure to Evaluate Mosquito Larval Mortality following Direct Contact with Test Larvicidal Compound
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2025
In this video, we describe the larval contact assay to evaluate the toxicity of the dopamine receptor antagonist amitriptyline on the third instar stage larvae of mosquitoes, known vectors of several human infectious diseases. Assessing the larval mortality upon incubation with different amitriptyline concentrations over different time intervals helps determine its lethal concentration 50.
FAQs
Transmission does not by itself guarantee infection; the infectious agent must reach a susceptible host and enter through a suitable site. The overview identifies mucous membranes, the respiratory tract, and breaks in the skin as relevant entry points. This makes exposure assessment biologically important, because the location and condition of contact can influence whether the pathogen gains access to the host.
Each reservoir represents a possible source from which a pathogen can move toward a susceptible host. An infected person or animal may provide direct exposure, whereas an environmental reservoir can involve contaminated objects or surfaces. Recognizing these different sources broadens infection-control planning beyond the visibly ill individual and helps identify where transmission may be occurring.
The key distinction is whether transfer occurs through direct physical contact or through an intermediate contaminated material. Touching an infected host represents direct contact, while equipment, shared materials, and other fomites support indirect contact. This comparison matters because controlling spread may require both measures directed at interactions between people and measures directed at contaminated surfaces or objects.
The principal measures identified for this route are hand hygiene, surface disinfection, protective equipment, isolation, and contact tracing. They address different points in the transmission process: hands and surfaces, personal exposure, interaction with infected individuals, and identification of potentially connected cases. Used in healthcare, community, and research settings, these measures help reduce the likelihood of continued spread.
They should consider it when possible links include physical interactions, shared equipment or materials, contaminated surfaces, or exposure to an infected person, animal, or environmental reservoir. Contact tracing is especially relevant because it helps identify people connected to a potential source. This information supports targeted infection-control actions in healthcare facilities, communities, and research environments.
Studying this route connects pathogen movement with practical control decisions. Investigators can examine the source reservoir, the type of contact, the possible entry site, and the susceptible host, then select measures such as hygiene, disinfection, protective equipment, isolation, or tracing. Understanding these links supports efforts to limit outbreaks rather than treating transmission as a single undifferentiated event.