Close Contact
Close Contact - Related Videos
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.
03:55
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.
01:29
Close Relationships and Culture
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2025
Culture shapes how people approach attraction, choose partners, and build long-term relationships. While some preferences in mate selection appear consistent across cultures, such as men valuing physical attractiveness and women emphasizing financial resources, cultural contexts influence how these preferences are expressed and prioritized. Marriage extends beyond romantic ideals in many societies and is deeply embedded in social, economic, and religious frameworks.The Role of Culture in Mate...
08:28
Development of an In Vitro Ocular Platform to Test Contact Lenses
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Cited by 14 •
2016
Current in vitro models for evaluating contact lenses (CLs) and other eye-related applications are severely limited. The presented ocular platform simulates physiological tear flow, tear volume, air exposure and mechanical wear. This system is highly versatile and can be applied to various in vitro analyses with CLs.
FAQs
Risk is shaped by the combination of proximity, duration, and ventilation rather than by a single factor. Being nearer to an infected person, spending more time in the interaction, or experiencing different ventilation conditions can alter the likelihood of exposure, depending on how the pathogen spreads. Clinicians therefore evaluate these circumstances together when assessing an encounter.
Transmission route determines which features of an interaction matter most. Inhalation of respiratory particles makes the interaction and ventilation conditions relevant, whereas infectious secretions point to contact with those secretions; direct skin-to-skin spread emphasizes physical contact. Identifying the plausible route helps clinicians interpret whether an encounter represents meaningful exposure and select appropriate follow-up.
Close-contact criteria cannot be transferred unchanged from one infection to another. Pathogens differ in how they spread, so the relevant exposure features and criteria may need adjustment. The setting also matters, as does the public health guidance currently in force. This flexibility allows clinicians and public health teams to interpret an encounter according to the transmission pattern they are evaluating.
An exposure assessment characterizes the interaction in relation to the infected person and the suspected pathogen. Clinical or public health teams consider proximity, duration, ventilation, transmission route, and setting, then apply criteria adapted to that infection. The resulting assessment supports contact tracing and helps determine whether testing, monitoring, isolation, or preventive treatment should be considered.
Close-contact criteria turn an encounter into an actionable public health assessment. Teams can use them to identify people who may need contact tracing, recommend testing, monitor for relevant developments, or make decisions about isolation and preventive treatment. The response is not necessarily universal; follow-up is matched to the infection, setting, and current public health guidance.
Clinical teams should not treat a close-contact designation as independent of context. The same type of interaction may be evaluated differently when the pathogen, setting, or applicable public health guidance changes. Reviewing those conditions keeps testing, monitoring, isolation, and preventive-treatment decisions aligned with the exposure framework being used at that time.