Bacterial Identification
Bacterial Identification - Related Videos
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.
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.
09:34
Identification of Growth Inhibition Phenotypes Induced by Expression of Bacterial Type III Effectors in Yeast
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Cited by 33 •
2010
In this video, we describe a procedure for the expression of bacterial type III effectors in yeast and the identification of effector-induced growth inhibition phenotypes. Such phenotypes can be subsequently exploited to elucidate effector functions and targets.
05:19
Isolation and Identification of Bacterial Strains from Skin of Terrestrial Amphibians
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2025
This is a method for sampling and isolating culturable bacteria from the cutaneous microbiota of European plethodontid salamanders (Speleomantes genus). Here, we present a protocol for sampling salamander skin with swabs and processing them using culturable approaches. We describe sampling, isolation, and establishment of axenic culture with bacterial strain characterization.
14:12
Rodent Identification II
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2015
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Animal records must be accurately maintained to ensure that data collection is correct. Records range from maintaining information on cage cards to having a detailed database with all of the relevant information on each animal. The primary component of recordkeeping is the individual identification of research animals. There are a variety of methods suitable for identifying mice and rats. This...
FAQs
Colony morphology and cellular features provide visible characteristics that help researchers compare bacterial isolates before interpreting results from differential staining, culture-based tests, biochemical reactions, or molecular methods. These observations are especially useful as part of a combined evidence base: using several kinds of characteristics helps distinguish closely related organisms more reliably than relying on a single observation.
Differential staining and biochemical reactions contribute different kinds of evidence. Staining helps characterize bacterial cells, while biochemical testing examines reactions associated with their biological properties. When interpreted with colony morphology, cellular features, and culture-based findings, these results can separate organisms that appear similar and strengthen the basis for identifying a bacterial species.
Molecular methods become particularly valuable when researchers need to distinguish closely related organisms or add evidence beyond culture and visible features. Nucleic acid amplification and sequencing provide molecular information that can support identification alongside staining, biochemical reactions, and culture-based tests. In biology, this evidence also helps connect bacterial identity with physiology, evolution, disease, or environmental interactions.
A combined workflow examines bacterial characteristics at several levels. Researchers may consider colony morphology and cellular features, apply differential staining, use culture-based tests and biochemical reactions, and then incorporate nucleic acid amplification or sequencing when molecular evidence is needed. The resulting profile supports comparisons among organisms and helps link an identified bacterium to a biological or practical question.
Identifying bacteria can associate a microorganism with an infection and help investigators examine whether bacterial findings are relevant during an outbreak investigation. The information is not limited to naming an organism: it can also support antimicrobial susceptibility testing and contribute to targeted strategies for controlling bacteria. These uses make accurate identification important in disease-related and public-health research.
In environmental studies, identification helps link particular bacteria to ecological functions and interactions. The same approach supports food and water safety monitoring by determining which bacterial identities are present in tested settings. These applications extend identification beyond disease research, allowing biologists to investigate microbial diversity and develop targeted strategies for controlling or using bacterial species.