Bacterial Species Identification
Bacterial Species Identification - Related Videos
09:15
DNA-based Fish Species Identification Protocol
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Cited by 9 •
2010
This publication describes how to use the Agilent Fish Species Identification System to identify the species of a fish by extracting DNA and performing PCR and RFLP analysis.
05:02
A 1.5 Hour Procedure for Identification of Enterococcus Species Directly from Blood Cultures
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Cited by 15 •
2011
A rapid protocol for the direct identification of Enterococcus faecalis and other Enterococcus species from a positive blood culture using a Peptide Nucleic Acid fluorescent in situ hybridization assay (PNA FISH).
10:03
Isolation, Propagation, and Identification of Bacterial Species with Hydrocarbon Metabolizing Properties from Aquatic Habitats
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2021
We present the process of isolating, propagating, and characterizing hydrocarbon-degrading bacteria from aquatic habitats. The protocol outlines bacterial isolation, identification by the 16S rRNA method, and testing of their hydrocarbon-degrading potential. This article would help researchers in characterizing microbial biodiversity in environmental samples, and specifically screen for microbes with bioremediation potential.
06:34
Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
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Cited by 29 •
2016
Matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) and molecular techniques (16S rRNA gene sequencing) permit the identification of rare bacterial pathogens in routine diagnostics. The goal of this protocol lies in the combination of both techniques which leads to more accurate and reliable data.
09:30
Bacterial Detection & Identification Using Electrochemical Sensors
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Cited by 6 •
2013
We describe an electrochemical sensor assay method for rapid bacterial detection and identification. The assay involves a sensor array functionalized with DNA oligonucleotide capture probes for ribosomal RNA (rRNA) species-specific sequences. Sandwich hybridization of target rRNA with the capture probe and a horseradish peroxidase-linked DNA oligonucleotide detector probe produces a measurable amperometric current.
FAQs
Marker-gene analysis provides a molecular route to resolving bacterial identity in environmental samples. Researchers amplify and sequence a taxonomic marker such as the 16S rRNA gene, then compare the resulting sequence with entries in reference databases. This comparison supports assignment to a bacterial species and complements observations that may not distinguish closely related environmental organisms.
Observable traits and molecular evidence answer different parts of the identification problem. Cell morphology, growth behavior, and biochemical reactions describe how an organism appears and behaves under tested conditions, whereas marker-gene sequencing supplies sequence-based taxonomic evidence. Combining these lines of evidence makes environmental characterization more informative than relying on a single trait or reaction.
Reference databases are central because a sequence becomes taxonomically useful through comparison with previously characterized reference entries. The quality of that comparison affects how confidently an environmental bacterium can be assigned. In practice, database-supported identification helps separate a simple detection result from ecological interpretation, such as recognizing organisms associated with nutrient cycling, contamination, or environmental stress.
A workflow can begin with an environmental sample and assessment of cell morphology, growth behavior, and biochemical reactions. Researchers can then amplify and sequence a taxonomic marker gene, such as 16S rRNA, and compare the sequence with reference databases. Using both observational and molecular results supports a more complete characterization of the bacterial community.
The same overall approach can characterize microbial communities in soil, freshwater, marine, and engineered ecosystems. Results may support biodiversity surveys, reveal changes in community composition, and help track contamination. Because the findings connect detected bacteria with ecological context, they can also inform environmental monitoring and evidence-based management.
Identifying particular bacteria allows researchers to examine possible links between organisms and nutrient cycling or environmental stress. In contamination studies, the results can help track which bacterial taxa are present as conditions change. This organism-level information adds ecological meaning to community surveys and can support decisions about monitoring priorities and environmental management.