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A biological indicator is also the name given to a process for assessing the sterility of an environment through the use of resistant microorganism strains (e.g. Bacillus or Geobacillus). [5] Biological indicators can be described as the introduction of a highly resistant microorganisms to a given environment before sterilization , tests are ...
In biomedical contexts, a biomarker, or biological marker, is a measurable indicator of some biological state or condition. Biomarkers are often measured and evaluated using blood, urine, or soft tissues [1] to examine normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention. [2]
Many different types of indicators have been developed. They can be used to reflect a variety of aspects of ecosystems, including biological, chemical and physical. Due to this variety, the development and selection of ecological indicators is a complex process.
In medicine, a biomarker is a measurable indicator of the severity or presence of some disease state. It may be defined as a "cellular, biochemical or molecular alteration in cells, tissues or fluids that can be measured and evaluated to indicate normal biological processes, pathogenic processes, or pharmacological responses to a therapeutic intervention."
Indicator bacteria themselves may not be pathogenic but their presence in waste may indicate the presence of other pathogens. [1] Similar to how there are various types of indicator organisms, there are also various types of indicator bacteria. The most common indicators are total coliforms, fecal coliforms, E. coli, and enterococci. [2]
Numerous biotic indices have been created to account for the indicator species found in each region of study. The concept of the biotic index was developed by Cherie Stephens in an effort to provide a simple measurement of stream pollution and its effects on the biology of the stream. [citation needed]
The scientists looked at a bunch of biomarkers, and found that people who took 1 gram of omega-3 fatty acids daily slowed down their biological aging across several areas by up to four months.
A Biological Indicator Evaluation Resistometer (BIER) vessel is a piece of equipment used to determine the time taken to reduce survival of a given organism by 90% (also known as a log 1 reduction). The name derives from how the equipment is used. A BIER vessel evaluates the resistance of biological indicators to moist heat sterilization. [1]