Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

[Rapid urease test].

Mototsugu Kato1, Yuichi Shimizu, Takahiko Kobayashi

  • 1Department of Endoscopy, Hokkaido University Graduate School of Medicine.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|February 28, 2003
PubMed
Summary

This study examines a diagnostic test for detecting Helicobacter pylori infection. The test uses gastric biopsy samples to detect urea-splitting activity. Color change in a pH indicator shows bacterial presence. The test is fast and inexpensive but requires endoscopy. It works well before treatment but has lower accuracy after treatment completion. False negative results occur in 15-20% of cases within six months post-treatment. The study suggests using this test in specific clinical situations. The findings help guide appropriate use of this diagnostic method.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Congenital Kir6.2 deficiency, but not acute K<sub>ATP</sub> channel blockade, attenuates apomorphine-induced locomotor activity in mice.

Pharmacology, biochemistry, and behavior·2026
Same author

SirT2 Inhibition is Associated with Improvements in Depression-like Behavior and Memory Impairment in Olfactory Bulbectomized Mice.

Molecular neurobiology·2026
Same author

AICAR improves depression-like behaviors and is associated with hippocampal AMPK activation and modulation of neurogenesis and neuroinflammation in a microbiota disruption model.

Neurochemistry international·2026
Same author

Effects of sacubitril/valsartan according to daily salt intake and comparison with thiazide add-on treatment in patients with uncontrolled hypertension.

Hypertension research : official journal of the Japanese Society of Hypertension·2025
Same author

Comparison of renal effects between sacubitril/valsartan and thiazide diuretics among patients with uncontrolled hypertension and chronic kidney disease in Japan.

Clinical and experimental nephrology·2025
Same author

Neuronal dysfunction in the amygdala is involved in anxiety-like behaviors accompanying ulcerative colitis.

Neuroscience letters·2025

Area of Science:

  • Gastroenterology diagnostic techniques
  • Infectious disease detection methods
  • Clinical microbiology testing

Background:

Detecting Helicobacter pylori infection remains a clinical challenge. Current diagnostic approaches include non-invasive and invasive techniques. Non-invasive methods like breath tests and stool antigen detection have limitations in accessibility and cost. Invasive methods require endoscopic procedures to obtain biopsy samples. Prior research has shown that urea-based tests can detect H. pylori activity in gastric tissue. However, uncertainty remains about the optimal timing for these tests after treatment. This gap motivated investigation into the reliability and limitations of urea-splitting assays. No prior work had resolved the relationship between test timing and detection accuracy. That uncertainty drove this analysis of a specific diagnostic tool's performance characteristics.

Purpose Of The Study:

This analysis focuses on a single diagnostic method for H. pylori infection detection. The study aims to clarify the practical advantages and limitations of this technique. The specific problem addressed is the diagnostic accuracy of the method in different clinical scenarios. The motivation stems from the need to understand when this test provides reliable results. The study seeks to determine the test's utility before and after treatment. It also examines why the test may fail to detect active infection in certain cases. The goal is to inform clinical decision-making about diagnostic timing. This clarification helps guide appropriate use of the test in patient care.

Keywords:
Helicobacter pylori testinggastrointestinal diagnosticsendoscopic biopsy methodsurea-splitting assays

Frequently Asked Questions

The test detects H. pylori by measuring urea-splitting activity in biopsy samples. Color change in the pH indicator reflects ammonia production from urea breakdown.

The test has reduced sensitivity within six months post-treatment. False negative results occur in 15-20% of cases during this period.

The test requires gastric biopsy samples collected via endoscopy. These samples are necessary for the urea-splitting reaction to occur in the test container.

Color change indicates pH elevation from ammonia production. This occurs when H. pylori splits urea in the test container.

Related Experiment Videos

Main Methods:

The study describes a diagnostic procedure involving gastric biopsy samples. The method uses a pH-sensitive indicator in a test container. Urea is introduced to the biopsy specimen for bacterial activity detection. Color changes in the indicator reflect pH elevation from ammonia production. The test requires endoscopic biopsy collection for sample processing. No specialized equipment beyond standard endoscopy is needed. The procedure measures the time between sample placement and color change. The method evaluates test outcomes in both pre- and post-treatment settings.

Main Results:

The test detects H. pylori by measuring urea-splitting activity. Color change in the indicator occurs when pH rises above 6.5. The procedure provides results within minutes of sample placement. Test sensitivity is reported as lower after six months post-treatment. False negative results occur in 15-20% of cases during this period. The test remains useful for initial infection detection before treatment. Its accuracy declines significantly after treatment completion. The method's cost-effectiveness supports its clinical use despite limitations.

Conclusions:

The study confirms the test's value in initial infection detection. The authors note limitations in post-treatment detection accuracy. They propose that the test remains suitable for pre-treatment use. The researchers suggest that alternative methods may be needed after treatment. The study highlights the need for careful timing in test administration. They acknowledge the test's low cost and rapid results as advantages. The authors caution against relying on this test alone after treatment completion. Their findings support using the test in specific clinical scenarios only.

The test provides results within minutes of sample placement. Color change in the pH indicator signals test completion.

The authors suggest the test is suitable for pre-treatment detection. They caution against relying on it alone after treatment completion.