Environmental Toxicant
Environmental Toxicant - Related Videos
11:26
Ecotoxicological Method with Marine Bacteria Vibrio anguillarum to Evaluate the Acute Toxicity of Environmental Contaminants
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Cited by 10 •
2017
This work describes a new protocol to assess the ecotoxicity of pollutants, including emerging contaminants such as nanomaterials, using the marine bacterium Vibrio anguillarum. This method allows for the determination of the LC50, or mortality, the concentration that causes a 50% decrease in bacteria culturability, after a 6 h exposure.
14:40
Long-term Lethal Toxicity Test with the Crustacean Artemia franciscana
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Cited by 34 •
2012
This study concerns the development and standardization of a valuable methodological protocol to determine long-term (14 days) lethal toxicity exerted by chemical substances, industrial wastewater or sewage and liquid environmental samples on the saltwater crustacean, Artemia franciscana.
08:12
Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
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Cited by 7 •
2018
Understanding enamel formation and possible alterations requires the study of ameloblast activity. Here, we describe a reliable and consistent method to micro-dissect enamel organs containing secretion- and maturation-stage ameloblasts that may be used for further quantitative and qualitative experimental procedures.
08:49
Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
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Cited by 4 •
2017
This article summarizes the design attributes and the effectiveness of treatment systems that treat urban stormwater and agriculture irrigation runoff to remove pesticides and other contaminants associated with aquatic toxicity.
13:59
Assaying β-amyloid Toxicity using a Transgenic C. elegans Model
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Cited by 76 •
2010
The intensely studied nematode worm Caenorhabditis elegans can be transgenically engineered to express the human β-amyloid peptide (Aβ). Induced expression of Aβ in C. elegans muscle leads to a rapid, reproducible paralysis phenotype that can be used to monitor treatments that modulate Aβ toxicity.
FAQs
Health effects depend on dose, duration, and individual susceptibility rather than on the substance’s presence alone. A brief, high-level exposure and repeated lower-level exposure may create different clinical concerns, while susceptibility can modify vulnerability. These variables help clinicians interpret risk and prioritize prevention without assuming that every exposure produces the same outcome.
Different cellular targets can produce different patterns of injury. Oxidative stress can disturb cellular balance, receptor disruption can alter signaling, enzyme inhibition can interfere with biochemical reactions, and DNA damage can affect genetic material. Developmental interference adds concern when normal growth is disrupted. Identifying the likely mechanism helps connect exposure with clinical findings.
Route of exposure is an important part of interpreting toxicant risk. Inhalation, ingestion, and skin contact provide distinct entry pathways, so clinicians need to consider how contact occurred alongside dose and duration. This context supports more accurate exposure assessment and helps distinguish an isolated poisoning concern from risks associated with continuing contact.
Assessment begins by relating a patient’s circumstances to possible contact through air, water, soil, food, or a workplace. Clinicians consider the route, dose, duration, and individual susceptibility, then use clinical recognition and, when appropriate, biomonitoring to clarify the exposure. The resulting picture can guide patient care and prevention.
Biomonitoring adds an exposure-focused component to medical evaluation. Used alongside clinical recognition and information about where, how, and for how long contact occurred, it can support exposure assessment rather than relying only on suspected environmental sources. This is especially relevant when clinicians evaluate possible poisoning or longer-term disease risks.
Medical use extends beyond recognizing injury after exposure. Clinicians can apply knowledge of routes, mechanisms, dose, duration, and susceptibility to identify preventable contact and guide strategies that reduce exposure. This approach supports patient care and efforts to limit chronic disease risks linked to ongoing environmental or workplace contact.