Environmental Pathogen Exposure
Environmental Pathogen Exposure - Related Videos
09:08
Developing a Salivary Antibody Multiplex Immunoassay to Measure Human Exposure to Environmental Pathogens
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Cited by 11 •
2016
In the current climate of scarce resources, new technologies are emerging that allow researchers to conduct studies cheaper, faster and with more precision. Here we describe the development of a bead-based salivary antibody multiplex immunoassay to measure human exposure to multiple environmental pathogens simultaneously.
10:48
Aseptic Technique in Environmental Science
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Luisa Ikner Aseptic technique is a fundamental skill widely practiced in the field of environmental microbiology that requires a balance of mindfulness and practice in the laboratory. Proper use of this technique reduces the likelihood of bacterial or fungal contamination of reagents, culture media, and environmental samples. Aseptic technique is also vital to ensure data integrity and...
10:39
Single Cell Measurements of Vacuolar Rupture Caused by Intracellular Pathogens
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Cited by 22 •
2013
We describe a method for tracking the endomembrane rupture elicited by the intracellular bacteria Shigella flexneri and Mycobacterium tuberculosis upon host cell invasion. Our assay makes use of CCF4, a host cytoplasmic FRET probe in live or fixed cells. This reporter is degraded by an enzyme activity present on the bacterial surface.
09:17
Detection of Bacteriophages in Environmental Samples
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Alex Wassimi Viruses are a unique group of biological entities that infect both eukaryotic and prokaryotic organisms. They are obligate parasites that have no metabolic capacity, and in order to replicate, rely on host metabolism to produce viral parts that self-assemble inside host cells. Viruses are ultramicroscopic—too small to be viewed with the light microscope, visible only with...
10:11
Whole-Body Nanoparticle Aerosol Inhalation Exposures
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Cited by 51 •
2013
A whole-body nanoparticle aerosol inhalation exposure facility was constructed for nano-sized titanium dioxide (TiO2) inhalation toxicology studies. This system provides nano-TiO2 aerosol test atmospheres that have: 1) a steady mass concentration; 2) a homogenous composition free of contaminants; and 3) a stable particle size distribution during aerosol generation.
FAQs
Initial protection comes from physical barriers and innate immune defenses, which respond before antigen-specific adaptive immunity develops. This early stage helps determine whether contact remains limited or progresses toward infection and inflammation. In immunology, examining this sequence clarifies how the host responds immediately and how early protection relates to later, more targeted immune activity.
These factors can shift the outcome from limited exposure to infection and disease. A greater pathogen dose, a particular route of entry, higher virulence, or increased host susceptibility may alter the interaction between the organism and host defenses. Considering all four variables helps researchers interpret why similar environmental contacts can produce different health outcomes.
The route of entry helps determine how a pathogen first encounters the host and which protective systems respond at that interface. Inhalation, ingestion, skin contact, and mucous-membrane contact represent distinct exposure pathways that researchers can compare when assessing infection risk. Linking route to outcome supports more precise analysis of transmission and host protection.
Innate defenses act first and can produce inflammation while the immune system responds to the invading organism. Antigen-specific adaptive responses develop afterward, providing a more targeted stage of protection. Studying both phases helps immunologists distinguish immediate host reactions from later immune protection and evaluate how exposure may shape the overall infection outcome.
Investigations connect the exposure setting with transmission risk, host immune responses, and infection outcomes. Researchers examine interactions between pathogens and hosts, consider inflammation and immune protection, and evaluate how factors such as dose, entry route, virulence, and susceptibility affect results. This framework supports assessment of prevention strategies without treating exposure as a single uniform event.
Such research can identify transmission risks, clarify how inflammation and immune protection develop, and assess whether prevention strategies address important exposure conditions. These findings can inform public health measures intended to reduce infection. The work is therefore relevant beyond laboratory immunology, connecting host-pathogen mechanisms with decisions about reducing contact with environmental sources of disease.