Rapid Urease Test
Rapid Urease Test - Related Videos
09:10
Combination of Adhesive-tape-based Sampling and Fluorescence in situ Hybridization for Rapid Detection of Salmonella on Fresh Produce
0 Views •
Cited by 17 •
2010
This protocol describes a simple adhesive-tape-based approach for sampling of tomato and other fresh produce surfaces, followed by rapid whole cell detection of Salmonella using fluorescence in situ hybridization (FISH).
09:44
Rapid Amplification of cDNA Ends
0 Views •
2023
Source: Pablo Sanchez Bosch2, Sean Corcoran2 and Katja Brückner1,2,3 1Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research 2Department of Cell and Tissue Biology, 3Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA Rapid Amplification of cDNA Ends (RACE) is a technique that allows amplification of full-length cDNA from mRNA by extending to the 3’ or 5’ end, even without prior knowledge of the sequence (Frohman et al.,...
11:19
Novel RNA-Binding Proteins Isolation by the RaPID Methodology
0 Views •
2016
RNA-protein interactions lie at the heart of many cellular processes. Here, we describe an in vivo method to isolate specific RNA and identify novel proteins that are associated with it. This could shed new light on how RNAs are regulated in the cell.
01:25
Rapid Identification of Pathogens
0 Views •
2026
MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...
01:24
Rapidly Varying Flow
0 Views •
2025
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
FAQs
The visible color change is driven by an alkaline shift, not by direct detection of the organism’s cells. Urease hydrolyzes urea and generates ammonia; the resulting increase in pH activates the pH-sensitive indicator in the test medium. This chemical sequence links bacterial enzyme activity to an interpretable visual signal, allowing a tissue specimen to be assessed quickly.
A positive Rapid Urease Test indicates urease activity in the clinical specimen, most commonly from H. pylori, but the signal is not an exclusive identification of that organism. The test therefore connects the specimen with a urease-producing bacterium rather than independently establishing species identity. This distinction matters when interpreting the result in the context of suspected H. pylori infection.
Recent antibiotic or acid-suppressing treatment can reduce bacterial activity, leaving less urease available to hydrolyze urea and raise the pH. The medium may therefore show no color change even when H. pylori is present. Treatment history is consequently important when interpreting a negative result, because reduced bacterial activity can produce a false-negative finding.
During upper gastrointestinal endoscopy, a clinician obtains tissue and places it directly into prepared test medium containing urea and a pH-sensitive indicator. The specimen remains in contact with the medium while any urease activity produces the chemical change used for reading. This workflow combines endoscopic sampling with a simple visual assessment of enzyme activity.
The method’s practical value comes from pairing straightforward specimen placement with a visible endpoint. Because the result can often be assessed rapidly, it may support timely diagnostic evaluation rather than requiring a prolonged process before an initial indication is available. Its simplicity also permits direct assessment of urease activity in sampled tissue.
When H. pylori infection or related peptic ulcer disease is being evaluated, the test provides a rapid way to look for urease-producing bacteria in tissue obtained during endoscopy. Its role is especially useful when an upper gastrointestinal examination is already being performed, because the same procedure supplies the specimen needed for testing. Results can support diagnosis in this clinical setting.